First Day Vitamins Review

Are these vitamins for kids, teens, and adults the right choice for your family? We researched their ingredients and tried them ourselves.

by
Last updated: Dec 20th, 2024
Innerbody is independent and reader-supported. When you buy through links on our site, we will earn commission.   .
First Day Vitamins Review Lineup

Photo by Innerbody Research

It can be tough to ensure your child is getting all the nutrients they need — especially when nearly 40% of kids between the ages of two and 11 may be considered “picky eaters,” according to researchers. To try and fill in those gaps, a multivitamin may seem like the perfect solution. But with so many on the market, how can you know which is right for your family?

One such option is First Day, a company that believes it’s better to give your child — along with the teens and adults in your household — only what they need instead of regularly exceeding the recommended percent Daily Values (%DV).

In this review, we cover First Day’s efficacy, safety, cost, taste, and more to help you determine whether this brand of vitamins and probiotics is right for your family’s needs.

Our Findings

Editor's Rating4.65

When it comes to effectiveness and safety, First Day's gummy vitamins positively stand out. Multiple layers of third-party testing and German regulations ensure that you're consuming a safe product, and the company's formulation of its gummies is very thoughtful in its philosophy of providing only what data indicates we're likeliest to need at different life stages (avoiding oversupplementation). First Day's synbiotic supplement is similarly well-conceived, opting for strains that are supported by human studies. The biggest downside here is cost; some people won't be able to afford these supplements. But if they're within your budget, First Day vitamins are very much worth your consideration.

Pros

  • Doesn’t overload vitamins; gives kids, teens, and adults only what they need
  • Vegan, non-GMO, Halal, Kosher, gluten-free, and free from common allergens
  • Vitamins include a mix of 12 organic fruits and vegetables
  • Probiotic products are actually a mix of prebiotics, probiotics, and postbiotics
  • Supplements are third-party tested at least three times during manufacturing
  • Bottle you receive with your first order is reusable; you get a refill pouch each month
  • Gummies are fruit-flavored and enjoyable but not “candy-like”
  • Subscriptions take off 15% and ship for free, and bundles can reduce costs
  • 45-day money-back guarantee available

Cons

  • Vitamins contain sunflower oil, which may be a (rare) allergen for some people
  • Quite a bit more expensive than many other multivitamins and probiotics
  • Gummies melt quickly; may require refrigeration
  • Products for men and women are often sold out

Why you should trust us

Over the past two decades, Innerbody Research has helped tens of millions of readers make more informed decisions involving staying healthy and living healthier lifestyles.

For our review of First Day, we read through nearly 50 scientific papers, journals, articles, and reviews on the topics of proper vitamin and mineral supplementation, nutrition, probiotics, and more to ensure our recommendations are accurate and up-to-date. We also interacted with the First Day website, purchased the products ourselves, communicated with customer service, and tried the supplements out to provide you with first-hand details.

Additionally, like all health-related content on this website, this review was thoroughly vetted by one or more members of our Medical Review Board for accuracy.

How we evaluated First Day

When evaluating First Day’s vitamins, we carefully considered what consumers likely care about most: safety, effectiveness, cost, convenience, and taste.

Since First Day makes vitamins and probiotics — things you or your child will be consuming — safety comes first. Then, if you’re going to be taking something, you more than likely want it to actually be effective. After that comes the cost; it’s difficult to consistently use something if it’s too expensive to keep up with. And, finally, the convenience and taste of the product are more subjective than the other criteria, but they still can make a big impact on your overall customer experience.

Let’s go over how First Day fared in each criterion.

Safety

Rating: 9.5 / 10

First Day’s gummy vitamins and probiotics should be generally safe for most healthy children, teens, and adults. (However, we always recommend getting approval from your doctor before starting a new supplement.)

All of the company’s products are third-party tested for potency and contaminants. They’re also vegan, non-GMO, and free of common allergens like gluten, milk, eggs, and peanuts. However, it’s worth mentioning that the multivitamins do contain sunflower oil, which can be an allergen for some.

First Day’s supplements are made in a Good Manufacturing Practice (GMP) certified facility in Germany, where supplements are regulated as strictly as food for safety, with random sample checks by official monitoring bodies. In contrast, the U.S. Food and Drug Administration (FDA) only gets hands-on with supplements already on the market when there are adverse reaction reports.

First Day follows the philosophy that “more isn’t always better” with multivitamins. This is in contrast to competitor Hiya’s products, which contain several nutrients that meet or exceed a child’s percent Daily Value (%DV).

Insider Tip: First Day vitamins are only intended for kids age 4+, so they're not suitable for younger children. For them, you may want to look for an option made with toddlers in mind.

Hiya’s method may be risky with certain nutrients, like vitamin A. Now, vitamin A is important for kids to have, as they often get an inadequate amount, but exceeding the amount recommended of this vitamin can have dangerous consequences — like toxicity or Hypervitaminosis A, which children are at higher risk for due to their smaller body sizes. In comparison to First Day’s 130mcg (14% DV) of vitamin A, Hiya gives kids 360mcg (120% DV for kids 2-3, or 40% DV for kids four and up). Because of the risks, we prefer First Day’s approach.

None of the nutrients in First Day’s kids’ or teens’ vitamins come close to 100% DV, ensuring they remain well below the Tolerable Upper Intake Level (UL). Some of the adult nutrients hit the 100% DV mark, but only a handful of them — and none exceed 100%. And these, too, are well below the UL.

Effectiveness

Rating: 9.4 / 10

The effectiveness of First Day, or any multivitamin or supplement, ultimately depends on its ingredients. As noted above, First Day follows a less-is-more philosophy when it comes to the nutrient amounts in its multivitamins — but this doesn’t make it any less effective than a vitamin that’s packed with multiple 100% DVs, like Hiya. In fact, we gave both companies similar effectiveness scores because they both offer products that have necessary nutrients and other ingredients with good amounts of scientific support.

We’ll delve further into the science behind First Day’s vitamin content under the “How does First Day work?” section later on, but, for a quick example of efficacy, let’s take a closer look at the probiotic.

First off, First Day’s probiotic isn’t just a probiotic — it’s a prebiotic, probiotic, and a postbiotic. (But calling it a probiotic keeps things simple.) These all have different ways of helping you maintain a healthy gut. Prebiotics feed the organisms in your gastrointestinal system, probiotics deposit “good” living organisms into your gut microbiome, and postbiotics are the beneficial “leftovers” from when your body digests the former two (often vitamins, amino acids, and peptides).

First Day makes probiotics for kids, teens, men, and women, and each has a different collection of strains. Most of these particular strains have a nice amount of human research behind them, such as the following:

  • Bacillus coagulans SNZ 1969 (found in the teens’ and kids’ probiotics) may be able to boost gut motility after a few months, as demonstrated in a small 2021 trial.
  • Bacillus coagulans Unique IS-2 (in the women’s and men’s probiotics) appears to reduce the symptoms of irritable bowel syndrome (IBS) and reduce the risk of forming dental plaque.
  • IMMUSE Lactococcus lactis strain Plasma (found only in the men’s probiotic) helped athletes in a 2023 placebo-controlled study feel less fatigue after extensive physical training.

In comparison, Hiya’s probiotic strains may also help promote oral health or relieve digestive symptoms. But Hiya’s product does contain sorbitol, which might actually cause stomach upset in some kids.

However, Hiya’s probiotic — only available for kids — does contain 10 billion colony-forming units (CFU), while First Day’s kids’ probiotic only delivers one billion. (First Day’s teens’ probiotic gives 1.5 billion CFU, the women’s offers two billion CFU, and the men’s has five billion CFU.) As we’ve noted before, deciding which is ideal for your child will depend on what you and your family doctor feel is best.

Cost

Rating: 8.4 / 10

Compared to other vitamins on the market, First Day runs rather expensive at $39 for a one-time purchase of its multi. The probiotic isn’t priced as high, though; in fact, it’s less than some others (like Ritual’s Synbiotic+), but roughly $50 is still a rather large amount to pay for a daily supplement.

Here’s a breakdown of First Day’s costs (which are all the same, no matter which variety you choose — kids’, teens’, women’s, or men’s):

MultivitaminProbioticMulti and probiotic bundle
One-time $$39$49$79
One-time $ per serving$1.30$1.63$1.32 (per serving of each supplement)
Subscription $$33.15$41.65$67.15
Subscription $ per serving$1.11$1.39$1.12 (per serving of each supplement)

The price per serving can make the cost feel not as bad, especially when you subscribe. But, when you consider the low price of the 100-count OLLY’s Kids Multi Gummy Worms — $17.99 — it definitely shows how expensive First Day can be. Even Hiya’s high-nutrient vitamin is less expensive at $30 per month.

First Day, unlike OLLY and Hiya, offers a 45-day money-back guarantee on your first order. So, if you or your child aren’t fans of the products, you can contact customer service and request a refund. Ritual offers a similar guarantee, but only for 30 days.

Convenience

Rating: 8.9 / 10

In general, First Day is a convenient service. You can choose to purchase the supplements once or on a subscription basis, the latter of which means you’ll get fresh vitamins delivered to your door each month. This delivery frequency is important because gummy vitamins can lose their potency quicker than other types of vitamins, so too long of an interval could reduce their effectiveness.

Ordering is quick and painless, and canceling a subscription is as easy as clicking a button in your customer dashboard (in comparison, Hiya requires you to email customer support). First Day’s customer service is also friendly and responsive, at least in our experience; some customers report otherwise.

The only real inconvenience we experienced with First Day’s supplements came from the supplements themselves — not the service. Now, two gummies a day isn’t the inconvenient part; it’s the fact that the gummies melt extremely quickly and become a big, gelatinous mass. The company claims that the included sunflower oil in the multivitamins is to prevent this, but it doesn’t work very well at all. It’s not a terrible inconvenience, but it was frustrating to try and pick apart sticky, melted gummies.

To try and remedy this, we figured a little bit of time in the fridge would help — and it did. But, within a couple hours of being out of the fridge again (in a room that wasn’t anywhere near hot), they were melting again. What this all boils down to is that First Day vitamins and probiotics need constant refrigeration. This removes the melting frustration entirely, but it does mean sacrificing a bit of fridge space.

Taste

Rating: 9.1 / 10

For vitamins and supplements, First Day’s gummies are surprisingly tasty. The fruity mix of the vitamins is pleasant and palatable, but it doesn’t cross the border into “candy” territory. We feel this is an important achievement, especially since gummy vitamins can be easier to take too much of due to their candy-like taste and texture.

In comparison, OLLY’s Multivitamin Gummy Worms are perhaps too close to candy — if you put them in a mix of other similar gummy worms, you’d very likely not be able to tell which is which. While this can make it easier for kids to actually take their vitamins, it can be tempting for a child to sneak more and wind up overdosing. (This is also why it’s important to keep vitamins out of the reach of young children.)

Pivoting back to First Day’s taste, the probiotics have a distinct tropical, kiwi-like flavor, most likely due to the fact that they include kiwifruit powder as a prebiotic. Even one of our testers who isn’t a big fan of kiwi found these to be rather enjoyable to eat.

Overall, none of our testers had a single complaint about any of the flavors (or textures) they came across in First Day’s supplements. In contrast, Hiya’s chewable tablets were hit or miss, with only the probiotic being generally enjoyed.

What is First Day?

First Day Vitamins Review Kids

Photo by Innerbody Research

First Day is a company specializing in vitamins and probiotic supplements for kids (ages four and up), teens, women, and men. The company cites a few different goals it keeps in mind when creating its products:

  • Fighting hidden hunger (nutrient deficiencies)
  • Avoiding vitamin overconsumption (detrimental impacts of excess vitamins and minerals)
  • Ensuring bioavailability (making sure the nutrients can actually be used by the body)

The second one appears to be of great importance to First Day, as the company notes several times across the website that “more isn’t always better” when it comes to a multivitamin and its nutrients. Whether it's for kids, teens, or adults, First Day aims to only provide what you need (similar to competitor Ritual).

First Day’s probiotics also include pre- and postbiotics in an attempt to help your gut benefit from the entire cycle of beneficial microorganisms.

We cover how all of First Day’s products work under the “How does First Day work?” section later on in this review.

First Day company standing

First Day has a Better Business Bureau (BBB) page and a Trustpilot one, but neither has many reviews. Still, this information can be valuable.

On the accredited BBB page, First Day has an A rating with 4.92 stars out of a possible 5 based on 204 reviews, and there have only been six complaints within the last three years. The majority of the complaints are about difficulties taking advantage of the 45-day money-back guarantee, with customers claiming First Day gave them advice on how to sneak the vitamins into smoothies instead of actually giving them the refund. To get the refund, customers report having to refuse the advice and repeatedly ask for their money back over the course of a few days.

At the time of this writing, the Trustpilot page has a similar number of reviews — 225, culminating in an average of 4.5 out of 5 stars or “Excellent” by Trustpilot’s standards. The profile is claimed and the company has replied to 100% of negative reviews within 24 hours of receiving them. Most 1-star complaints on Trustpilot revolve around the vitamins arriving melted (which we also experienced) or difficulties canceling subscriptions.

Overall, this information can be valuable, as we stated, but we feel that a total of less than 500 reviews isn’t enough to completely judge a company.

Who are First Day vitamins for?

First Day Vitamins Review Teens

Photo by Innerbody Research

First Day vitamins and probiotics can be suitable for almost anyone — healthy children (ages 4+), teens, and adults — as long as your family doctor gives the okay.

First Day’s multivitamin may be a good choice if you want a multi that isn’t packed with “too many” nutrients and would prefer it to be more of a backup instead of the main driver of your healthy nutrition. (Technically, a healthy diet is the best way to go about getting proper nutrients — and supplements shouldn’t replace that — but something is better than nothing at all.)

First Day’s products are vegan, non-GMO, and free from common allergens and gluten. However, if you or your child have a sunflower allergy, these multivitamins would not be safe to take (though the probiotics are free from sunflower ingredients).

There are some situations, though, where First Day may not be the best choice for you or your family, including:

  • Cost: First Day supplements can be pricey, so a more affordable option, like OLLY’s Multi Gummy Worms, might be better.
  • Nutrient needs: If your child’s doctor feels that they need more nutrients than First Day provides, something like Hiya could be ideal.
  • Vitamin form: If you’re not a fan of gummies, then Ritual (capsules) for teens and adults or Hiya (chewable tablets) for kids are some other viable alternatives.

Are First Day vitamins safe?

Yes, First Day vitamins and probiotics should be safe for most healthy children, teens, and adults. They’re third-party tested at least three times during the production process for potency and contaminants. And all First Day supplements are non-GMO, vegan, Kosher, Halal, and free from gluten, milk, eggs, fish, crustaceans, shellfish, tree nuts, wheat, peanuts, and soybeans. (The multivitamins, however, do contain sunflower oil, which may be an allergen for some people.)

The company’s products are produced in an allergen-free, GMP-certified facility in Germany — a country that considers “food supplements” (like vitamins and probiotics) to be equivalent to food and, therefore, need to be as safe as food.

The German Federal Institute for Risk Assessment (BfR) states, “As food supplements are foods, they are covered by the basic provisions of the German Food and Feed Code of Law (LFGB) as well as all other legislation of the European Union in the area of food law. Amongst other things, foods must be safe, consumers may not be misled by the information on the package, and disease-related claims are prohibited.”

Similar to the FDA, however, the BfR notes, “In contrast to medicinal products, food supplements do not undergo any official authorization procedure, during which actual health safety must be proven, prior to placing on the market.” But, unlike the FDA, the official food monitoring bodies in Germany do conduct “random sample checks.” The FDA, in contrast, does monitor the market, but really only gets involved once adverse event reports are submitted about a product.

Pivoting back to the supplement contents, First Day maintains the philosophy that “more isn’t always better” when it comes to a multivitamin. Unlike Hiya’s kids’ vitamin, none of the percent Daily Values (%DV) in First Day’s Kids’ Daily Enrichment or Teens’ Daily Kickstart goes over 100%.

The adult vitamins include a handful of nutrients that meet your full daily requirement — vitamins C, D3, and B12, folate, and biotin — but again, nothing goes over that 100% mark. Additionally, no nutrient comes anywhere close to the Tolerable Upper Intake Level (UL).

The probiotics should also generally be safe for most healthy individuals. However, probiotics shouldn’t be taken by anyone with a central line or port, or those who are critically ill or immunocompromised.

Ultimately, while First Day should be safe, we do recommend getting the okay from your family doctor or pediatrician before adding a new vitamin or supplement to your or your child’s daily routine.

How does First Day work?

First Day’s supplements — the vitamins and probiotics — are powered by their individual ingredients. To start off, let’s examine the way the multivitamins work.

How First Day vitamins work

First Day Vitamins Review Kids Multivitamin Ingredients

Photo by Innerbody Research

Before delving into deeper detail, let’s first examine what nutrients are in each of First Day’s available vitamins — Kids’ Daily Enrichment, Teens’ Daily Kickstart, Women’s Daily Supercharge, and Men’s Daily Provisions. The chart below covers each nutrient available in these vitamins and whether or not it’s present in a specific variety.

Kids’Teens’Women’sMen’s
Vitamin A
Vitamin C
Vitamin D3
Vitamin E
Vitamin K
Vitamin B1
Vitamin B2
Vitamin B6
Folate (B9)
Vitamin B12
Biotin
Magnesium
Zinc

As you can see, there aren’t too many differences between the four options, and the women’s and men’s vitamins are the same — except for their dosing of some nutrients. The different doses and percent Daily Values (%DV) that each vitamin fulfills for that specific age group (kids, teens, and adults) are listed in the next chart down below.

Kids’Teens’Women’sMen’s
Vitamin A130mcg (14%)230mcg (26%)250mcg (28%)390mcg (43%)
Vitamin C20mg (22%)65mg (72%)90mg (100%)90mg (100%)
Vitamin D310mcg (50%)12mcg (60%)20mcg (100%)20mcg (100%)
Vitamin EN/A7mg (47%)10mg (67%)10mg (67%)
Vitamin K25mcg (21%)32mcg (27%)40mcg (33%)45mcg (38%)
Vitamin B10.3mg (25%)380mcg (32%)450mcg (38%)650mcg (54%)
Vitamin B20.333mg (26%)450mcg (35%)550mcg (42%)750mcg (58%)
Vitamin B60.38mg (22%)800mcg (47%)1mg (59%)1.25mg (74%)
Folate (B9)80mcg (20%)344mcg (86%)400mcg (100%)400mcg (100%)
Vitamin B121.8mcg (75%)2.1mcg (88%)2.4mcg (100%)2.4mcg (100%)
BiotinN/AN/A30mcg (100%)30mcg (100%)
MagnesiumN/A65mg (15%)78mg (19%)78mg (19%)
ZincN/A2mg (18%)2mg (18%)5mg (45%)

First Day (similar to one of our favorite vitamins for adults, Ritual) tries to only offer what you or your kids need. The company has information on its website dedicated to things like vitamin overconsumption awareness, and the FAQ explains that “more isn’t always better” when it comes to a multivitamin. The FAQ goes on to say that “we already get most of our nutritional needs from our diet,” which is true according to both Cleveland Clinic pediatrician Dr. Laura O’Connor, MD, and the director of the Pediatric and Adolescent Medicine Clinic at Johns Hopkins All Children’s Hospital, Dr. Rachel Dawkins, MD.

Dr. Dawkins states that “Even picky eaters get all of the nutrients they need from food,” but she recommends speaking with your doctor or pediatrician. Dr. O’Connor says something similar, noting, “It’s like having an insurance policy. You don’t need [a multivitamin], but it’s a good idea.”

With that being said, here’s how the vitamins and minerals in First Day’s supplements help to maintain your family’s health and well-being:

  • Vitamin A: This vitamin promotes better immune system, skin, reproductive, and vision health.
  • Vitamin B1 (Thiamin): Thiamin, or vitamin B1, helps your body convert glucose from what you eat into energy, and it also plays a role in proper nerve function.
  • Vitamin B2 (Riboflavin): Like vitamin A, riboflavin promotes better vision and skin health, but it also supports energy production.
  • Vitamin B6 (Pyridoxine): This vitamin helps your body metabolize protein and carbohydrates and create red blood cells. It also impacts your immune system, brain, and hormones.
  • Vitamin B9 (Folate): Folate is essential for the formation of red blood cells, and it plays a major role in the development of a baby’s nervous system, cells, and DNA when they’re in the womb. This is why it’s important for pregnant people to get adequate amounts of vitamin B9, folate, or folic acid.
  • Vitamin B12 (Cyanocobalamin): Vitamin B12 helps to create and maintain the myelin sheath surrounding nerve cells, as well as support red blood cell formation and energy production. Vitamin B12 also helps folate (B9) work properly.
  • Vitamin C: This vitamin supports collagen formation and iron absorption, and it can also boost the immune system and aid in fighting oxidative-stress-causing free radicals.
  • Vitamin D3: Vitamin D is important for the formation and maintenance of strong muscles and bones. Supplementation may also lower the risk of dental caries (cavities).
  • Vitamin E: Similar to vitamin C, vitamin E is an antioxidant that can help fight free radicals. It can also support the health of your vision, immune system, and skin.
  • Vitamin K: This vitamin is essential for blood clotting, but it also promotes healthy bones.
  • Biotin: Biotin is sometimes also referred to as “vitamin H,” but no matter what you call it, this vitamin helps turn the food you eat into energy.
  • Magnesium: This important mineral supports your immune system, blood pressure, lung function, and bone health. It also plays a role in your body’s ability to use glucose.
  • Zinc: Zinc promotes proper growth, development, and immune function. It also helps create an active form of vitamin A and moves it throughout the body.

Now that we’ve covered how First Day’s vitamins work, let’s turn to its probiotics.

How First Day’s probiotics work

First Day Vitamins Review Kids Probiotics Ingredients

Photo by Innerbody Research

Just like the multivitamins, First Day’s probiotics work due to their ingredients, both the similar and unique ones among them. Before covering the differences between the four probiotics — Kids’ Belly-Biotic, Teens’ Gut Sustainer, Women’s Good Gut, and Men’s Gut Guardian — let’s go over what they all have in common.

First off, these aren’t just “probiotics;” they’re pre-, pro-, and postbiotics. (To keep things simple, however, we’ll still keep referring to them as probiotics.) Here’s how the differences between the three break down:

Prebiotic

Experts define prebiotics as “a group of nutrients that are degraded by gut microbiota.” Basically, they’re food for probiotics. Prebiotics are often found in foods rich in fiber, like beans, whole grains, and certain vegetables.

Probiotic

Probiotics are living organisms that can be found in certain foods like yogurt, pickles, sauerkraut, some cheeses, kombucha, and other fermented foods. You can also get probiotics from supplements. These organisms promote a healthy balance in your gut microbiome, may improve digestion, and can boost your overall health.

Postbiotic

According to Dr. Toni Golen, MD, a member of the Harvard Health Publishing Editorial Advisory Board, postbiotics are “the waste left behind after your body digests both prebiotics and probiotics.” However, this “waste” can be beneficial for your gut health. Some postbiotics include vitamins B and K, amino acids, and certain peptides that can, as Dr. Golen says, “slow down the growth of harmful bacteria.”

Each First Day probiotic delivers 1-5 billion CFU (colony-forming units) per dose, depending on the probiotic — kids get less, while adults get more.

In comparison, though it only caters to children, Hiya’s probiotic offers kids 10 billion CFU per dose. This may make it a more potent probiotic, but it also includes some ingredients, like sorbitol, that can actually cause stomach upset and may negatively alter the gut microbiome with long-term use. So, the choice between First Day and Hiya’s probiotics really depends on what you and your child’s doctor feel is the better option — a relatively low-dose option or a high-dose one that contains some potentially stomach-upsetting ingredients. (In fairness to Hiya, sorbitol isn’t guaranteed to cause stomach problems in every child, it just has the potential to do so.)

Moving back to the similarities between First Day probiotics, all of them contain the same prebiotic — Livaux brand New Zealand Gold Kiwifruit powder. Various studies on kiwifruit powder as a prebiotic (both as Livaux and unbranded) have found the following:

  • Kiwifruit positively affects the gut microbiota for as long as it’s consumed, but the positive effects decline or cease once consumption stops.
  • Gold kiwifruit, specifically, promotes an abundance of the bacteria species Bacteroides, which can metabolize polysaccharides and oligosaccharides. Experts note that this ability helps them provide “nutrition and vitamins to the host and other intestinal microbial residents.”
  • A supplement containing Livaux increased the abundance of Faecalibacterium prausnitzii when consumed over a month by participants with constipation. F. prausnitzii is a producer of butyrate and, as noted by researchers, “has also been shown to exert anti-inflammatory effects in many studies.”

With the main similarities covered, let’s take a look at how each of First Day’s probiotics differs from each other. (The differences are all in the strains used to power each supplement.)

Kids’ Belly-Biotic

This probiotic for children contains Lactobacillus paracasei MCC1849 and Bacillus coagulans SNZ 1969.

In a 2023 study of 200 healthy adults experiencing cold-like symptoms, those who took L. paracasei MCC1849 experienced fewer days with symptoms than the placebo group — meaning it may be able to modulate the immune system. And B. coagulans SNZ 1969 improved gut motility compared with a placebo when taken for two months by healthy adults with mild constipation in a small 2021 trial.

Teens’ Gut Sustainer

First Day’s probiotic for teens includes the strains FloraSMART (Lactobacillus casei 327) and Bacillus coagulans SNZ 1969. Along with B. coagulans SNZ 1969, L. casei may also have motility-boosting potential. And the strain L. casei 327, specifically, also appears to improve the regularity of bowel movements.

Women’s Good Gut

The women’s probiotic has three different strains: Immuno-LP20 (Lactobacillus plantarum L-137), Bacillus coagulans Unique IS-2, and Bacillus subtilis OPTIBIOME BS50.

The first strain, L. plantarum Immuno-LP20, may be able to reduce the incidence of upper respiratory tract infections by modulating the immune system. The second strain, B. coagulans Unique IS-2, appears to be able to reduce the symptoms of irritable bowel syndrome (IBS) and lower the risk of forming dental plaque. And taking the final strain, B. subtilis OPTIBIOME BS50, may be a “well-tolerated and safe strategy” to relieve gas-related GI symptoms in healthy adults, according to researchers.

Men’s Gut Guardian

Like the kids’ and teens’ probiotics, the men’s probiotic only has two strains: Bacillus coagulans Unique IS-2 and IMMUSE Lactococcus lactis strain Plasma. Since this probiotic also contains Bacillus coagulans Unique IS-2, it may also alleviate IBS symptoms and lower your risk of dental plaque.

The other strain in this probiotic, IMMUSE L. lactis strain Plasma, activates plasmacytoid dendritic cells (pDCs), which play a key role in your immune system’s antiviral response. A placebo-controlled study on athletes taking this strain after two weeks of “continuous exercise load” resulted in the treatment group experiencing “significantly lower” autonomic fatigue parameters. This means that this strain could reduce feelings of fatigue after intense physical training.

First Day pricing, subscription, and guarantee

Perhaps the biggest drawback of First Day is its price; these vitamins are rather expensive, even with subscription discounts. And even though it’s safer for vitamins to have only the nutrients you may need in them, it can feel a bit strange paying more for First Day’s lower %DVs than Hiya’s multiple 100% DV vitamins. But, perhaps increased safety is worth more in the long run.

No matter how you look at it, though, these vitamins are more expensive than most competitors. Let’s break down the costs of individual vitamins and probiotics along with their bundles (one of each).

Note: All varieties (kids’, teens’, men’s, and women’s) cost the same. And one-time purchases tack on a $5 shipping fee if you don’t hit the $45 free shipping threshold; shipping is free for subscriptions.

MultivitaminProbioticMulti and probiotic bundle
One-time $$39$49$79
One-time $ per serving$1.30$1.63$1.32 (per serving of each supplement)
Subscription $$33.15$41.65$67.15
Subscription $ per serving$1.11$1.39$1.12 (per serving of each supplement)

Additionally, you can purchase in bulk (up to four probiotics and eight multivitamins) to save some money per unit, but we don’t recommend this. Gummy vitamins lose their potency quicker than other forms of vitamins (like tablets or pills), so you may end up spending more upfront to actually lose money in the end.

If you want to save, subscribing or opting for the bundles appears to be the best way to reduce costs over time. Thankfully, in the event that you or your children don’t like First Day’s supplements, the company offers a 45-day money-back guarantee on your first purchase. Neither Hiya nor OLLY offer money-back guarantees. Ritual does, but it’s only for 30 days, in comparison.

Our experience with First Day

Our experience trying First Day was generally positive — purchasing is straightforward and simple, subscription management was uncomplicated (you can cancel with the click of a button in your customer dashboard), and customer support was friendly, knowledgeable, and responsive.

The only real difficulty we encountered was the vitamins, themselves, melting very easily. It may be frustrating to have to give up a bit of space, but we found that keeping the supplements in the refrigerator stops them from becoming a big blob of vitamin goo. (Pictured below is how First Day’s vitamins look when melted.)

First Day Vitamins Review Gummies

Photo by Innerbody Research

Other vitamin gummies we have on hand, like OLLY’s, haven’t gone through the same slimy “metamorphosis” that First Day’s did. The “other ingredients” between the two brands’ multivitamins aren’t all that different, either; there doesn’t appear to be some preservative that OLLY uses and First Day doesn’t. In fact, First Day notes that it includes sunflower oil in its multivitamins to prevent the exact thing we experienced.

Melting aside, these vitamins taste very good but don’t get too close to being candy-like, which we appreciate. Using OLLY as a comparison again, its multivitamin gummy worms are nearly indistinguishable from actual gummy worms. And while that can be great to get kids to eat them, it does raise the risk of overdose from eating (or sneaking) too many. So, we like the fact that First Day’s vitamins and probiotics are tasty without being mistaken for candy.

Alternatives to First Day

First Day is far from the only vitamin company on the market. And, while our alternatives only cover a very small portion of the options out there, they may be better fits for your or your family’s needs.

Hiya

If the idea of First Day’s lower nutrients doesn’t thrill you, or your family doctor has recommended your child take something more potent, then Hiya’s multivitamin may be the option for your child. While First Day’s kids’ products are only intended for children four and up, Hiya makes its supplements for children two and older. Since the nutrition needs of kids vary by age group, on each Hiya product you’ll be able to find two sets of nutrition facts: one for kids 2-3 and one for kids 4+.

Several of Hiya’s multivitamin nutrients come close to or exceed the recommended Daily Value, especially for kids ages 2-3. Here are the vitamins and minerals that go over 100% for each age group:

  • Hiya (ages 2-3): vitamins A, C, and D, thiamin, riboflavin, folate, vitamin B12, biotin, pantothenic acid, zinc, manganese
  • Hiya (ages 4+): vitamin D

These higher nutrient amounts may pose a hazard for younger kids, but they may also make the vitamin more “effective” in filling in the nutrient gaps for the pickiest of eaters.

Additionally, Hiya’s other supplements — an iron supplement, probiotic, and Bedtime Essentials — have their merits, too. For example, Hiya uses carbonyl iron, which helped kids with iron deficiency more than treatment with ferrous sulfate in a 2009 study.

Cost-wise, Hiya isn’t all that much cheaper than First Day. For example, the multivitamin and probiotic are both $30 per month — and you can only subscribe. The company also doesn’t offer a money-back guarantee, unlike First Day.

To learn more about Hiya, check out our full review.

Ritual

Though Ritual vitamins are currently only available for teens and adults, the company takes a similar approach to First Day. However, instead of offering lower amounts of a wider variety of vitamins and minerals, several of Ritual’s inclusions do go well over 100% DV but there are only a handful of nutrients in each supplement.

Ritual is only available as a subscription, and its pricing is slightly less ($33 per month) than First Day’s — at least for the multivitamin. The company’s Synbiotic+ is around $10 more expensive ($54) than First Day’s probiotics.

One of the most interesting — and fairly unique — things about Ritual is that its products are “Made Traceable,” meaning that the source, supplier, and final place of manufacture for each ingredient are publicly available. And, like First Day, Ritual is vegan, gluten-free, and free of major allergens.

OLLY Kids Multi Gummy Worms

OLLY’s gummies can be a budget-friendly alternative to First Day due to their lower price and greater serving size. For $17.99, you get 100 servings for kids ages 2-3 or 50 servings for children four and up.

There are multiple nutrients in high concentrations with OLLY’s Multi Gummy Worms, however, like vitamin B12, biotin, and pantothenic acid. But, these vitamins are all water-soluble, meaning that any excess will be excreted in the urine and won’t build up in your child’s system.

As we’ve mentioned previously, there are a couple of drawbacks to OLLY’s gummy worm vitamins:

  • They’re almost too candy-like and may be tempting for kids to eat more
  • The larger quantity means that there’s a higher chance of them losing their potency before your child has a chance to take them all

Overall, though, these can be a good, far less expensive alternative to First Day if price is your main concern.

First Day FAQ

48

Sources

Innerbody uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

  1. Mascola, A. J., Bryson, S. W., & Agras, W. S. (2010). Picky eating during childhood: A longitudinal study to age 11-years. Eating Behaviors, 11(4), 253.

  2. Ramazzotti, M., Mulinacci, N., Pazzagli, L., Moriondo, M., Manao, G., Vincieri, F. F., & Degl’Innocenti, D. (2008). Analytic investigations on protein content in refined seed oils: Implications in food allergy. Food and Chemical Toxicology, 46(11), 3383-3388.

  3. Ukleja-Sokołowska, N., Gawrońska-Ukleja, E., Żbikowska-Gotz, M., Bartuzi, Z., & Sokołowski, Ł. (2016). Sunflower seed allergy. International Journal of Immunopathology and Pharmacology, 29(3), 498-503.

  4. U.S. Food and Drug Administration. (2024). Facts About the Current Good Manufacturing Practice (CGMP). FDA.

  5. German Federal Institute for Risk Assessment. (2018). Frequently Asked Questions on food supplements. BfR.

  6. U.S. Food and Drug Administration. (2022). FDA 101: Dietary Supplements. FDA.

  7. Linus Pauling Institute. (2018). Micronutrient Inadequacies in the US Population: an Overview. Oregon State University.

  8. National Library of Medicine. (2024). Hypervitaminosis A. MedlinePlus.

  9. Olson, J., Ameer, M., & Goyal, A. (2023). Vitamin A Toxicity. StatPearls Publishing.

  10. Food and Nutrition Board, Institute of Medicine, & National Academies. (2000). Dietary Reference Intakes (DRIs): Tolerable Upper Intake Levels for Vitamins. National Academy of Sciences.

  11. Davani-Davari, D., Negahdaripour, M., Karimzadeh, I., Seifan, M., Mohkam, M., Masoumi, S. J., Berenjian, A., & Ghasemi, Y. (2019). Prebiotics: Definition, Types, Sources, Mechanisms, and Clinical Applications. Foods, 8(3).

  12. Golen, T. (2021). What are postbiotics? Harvard Health Publishing.

  13. Ji, J., Jin, W., Liu, J., Jiao, Z., & Li, X. (2023). Probiotics, prebiotics, and postbiotics in health and disease. MedComm, 4(6).

  14. Kang, S., Park, M. Y., Brooks, I., Lee, J., Kim, S. H., Kim, J. Y., Oh, B., Kim, J. W., & Kwon, O. (2021). Spore-forming Bacillus coagulans SNZ 1969 improved intestinal motility and constipation perception mediated by microbial alterations in healthy adults with mild intermittent constipation: A randomized controlled trial. Food Research International, 146, 110428.

  15. Sudha, M. R., Jayanthi, N., Aasin, M., Dhanashri, R. D., & Anirudh, T. (2018). Efficacy of Bacillus coagulans Unique IS2 in treatment of irritable bowel syndrome in children: a double blind, randomised placebo controlled study. Beneficial Microbes, 9(4), 563–572.

  16. Sudha, M. R., Neelamraju, J., Reddy, M. S., & Kumar, M. (2020). Evaluation of the Effect of Probiotic Bacillus coagulans Unique IS2 on Mutans Streptococci and Lactobacilli Levels in Saliva and Plaque: A Double-Blind, Randomized, Placebo-Controlled Study in Children. International Journal of Dentistry, 2020.

  17. Komano, Y., Fukao, K., Shimada, K., Naito, H., Ishihara, Y., Fujii, T., Kokubo, T., & Daida, H. (2023). Effects of Ingesting Food Containing Heat-Killed Lactococcus lactis Strain Plasma on Fatigue and Immune-Related Indices after High Training Load: A Randomized, Double-Blind, Placebo-Controlled, and Parallel-Group Study. Nutrients, 15(7).

  18. Teanpaisan, R., Piwat, S., Tianviwat, S., Sophatha, B., & Kampoo, T. (2015). Effect of Long-Term Consumption of Lactobacillus paracasei SD1 on Reducing Mutans streptococci and Caries Risk: A Randomized Placebo-Controlled Trial. Dentistry Journal, 3(2), 43-54.

  19. Segers, M. E., & Lebeer, S. (2014). Towards a better understanding of Lactobacillus rhamnosus GG - host interactions. Microbial Cell Factories, 13(Suppl 1), S7.

  20. Liauw, S., & Saibil, F. (2019). Sorbitol: Often forgotten cause of osmotic diarrhea. Canadian Family Physician, 65(8), 557-558.

  21. UCLA Health. (2022). Should you take gummy vitamins? UCLA Health.

  22. Buechner, M. (2019). To Improve Kids’ Nutrition, a Little Sprinkle Goes a Long Way. UNICEF USA.

  23. Environmental Working Group. (2014). How Much is Too Much? EWG.

  24. National Cancer Institute. (n.d.). Bioavailable. NIH.

  25. Wooltorton, E. (2003). Health and Drug Alerts: Too much of a good thing? Toxic effects of vitamin and mineral supplements. CMAJ: Canadian Medical Association Journal, 169(1), 47-48.

  26. Harvard Medical School. (2021). Do you need a daily supplement? Harvard Health Publishing.

  27. Hojsak, I., Fabiano, V., Pop, T. L., Goulet, O., Zuccotti, G. V., Çokuğraş, F. C., & Kolaček, S. (2018). Guidance on the use of probiotics in clinical practice in children with selected clinical conditions and in specific vulnerable groups. Acta Paediatrica (Oslo, Norway: 1992), 107(6), 927-937.

  28. Dawkins, R. (n.d.). Do Kids Need Vitamin Supplements? Johns Hopkins Medicine.

  29. Cleveland Clinic. (2022). Vitamins for Kids: Do Children Really Need Supplements? Cleveland Clinic Health Essentials.

  30. BetterHealth Channel. (n.d.). Vitamins and minerals. Victoria State Government.

  31. BetterHealth Channel. (n.d.). Vitamin B. Victoria State Government.

  32. Cleveland Clinic. (2024). Oxidative Stress Cleveland Clinic.

  33. Botelho, J., Machado, V., Proença, L., Delgado, A. S., & Mendes, J. J. (2020). Vitamin D Deficiency and Oral Health: A Comprehensive Review. Nutrients, 12(5).

  34. Mount Sinai. (n.d.). Vitamin H (Biotin). Icahn School of Medicine at Mount Sinai.

  35. National Institutes of Health. (2023). Probiotics - Fact Sheet for Consumers. NIH.

  36. Li, C., Wang, C., Lin, Y., Kuo, H., Wu, J., Hong, T., Chang, C., & Wu, H. (2022). Long-term consumption of the sugar substitute sorbitol alters gut microbiome and induces glucose intolerance in mice. Life Sciences, 305, 120770.

  37. Lee, Y. K., Low, K. Y., Siah, K., Drummond, L. M., & Gwee, A. (2012). Kiwifruit (Actinidia deliciosa) changes intestinal microbial profile. Microbial Ecology in Health and Disease, 23.

  38. Blatchford, P., Stoklosinski, H., Walton, G., Swann, J., Gibson, G., Gearry, R., & Ansell, J. (2015). Kiwifruit fermentation drives positive gut microbial and metabolic changes irrespective of initial microbiota composition. Bioactive Carbohydrates and Dietary Fibre, 6(1), 37-45.

  39. Zafar, H. (2021). Gut Bacteroides species in health and disease. Gut Microbes, 13(1).

  40. Blatchford, P., Stoklosinski, H., Eady, S., Wallace, A., Butts, C., Gearry, R., Gibson, G., & Ansell, J. (2017). Consumption of kiwifruit capsules increases Faecalibacterium prausnitzii abundance in functionally constipated individuals: A randomised controlled human trial. Journal of Nutritional Science, 6.

  41. Sato, S., Arai, S., Iwabuchi, N., Tanaka, M., Hase, R., & Sakane, N. (2023). Effects of Heat-Killed Lacticaseibacillus paracasei MCC1849 on the Maintenance of Physical Condition in Healthy Adults: A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study. Nutrients, 15(15).

  42. Dimidi, E., Christodoulides, S., Scott, S. M., & Whelan, K. (2017). Mechanisms of Action of Probiotics and the Gastrointestinal Microbiota on Gut Motility and Constipation. Advances in Nutrition, 8(3), 484-494.

  43. SAITO, Y., MIHARA, T., OKI, M., & KUMAGAI, T. (2018). Effects of heat-killed Lactobacillus casei subsp. Casei 327 intake on defecation in healthy volunteers: A randomized, double-blind, placebo-controlled, parallel-group study. Bioscience of Microbiota, Food and Health, 37(3), 59-65.

  44. Hirose, Y., Yamamoto, Y., Yoshikai, Y., & Murosaki, S. (2013). Oral intake of heat-killed Lactobacillus plantarum L-137 decreases the incidence of upper respiratory tract infection in healthy subjects with high levels of psychological stress. Journal of Nutritional Science, 2.

  45. Garvey, S. M., Mah, E., Blonquist, T. M., Kaden, V. N., & Spears, J. L. (2022). The probiotic Bacillus subtilis BS50 decreases gastrointestinal symptoms in healthy adults: A randomized, double-blind, placebo-controlled trial. Gut Microbes, 14(1).

  46. Swiecki, M., & Colonna, M. (2015). The multifaceted biology of plasmacytoid dendritic cells. Nature Reviews Immunology, 15(8), 471-485.

  47. Farias, I., Colpo, E., Botton, S., & Silveira, R. (2009). Carbonyl iron reduces anemia and improves effectiveness of treatment in under six-year-old children. Revista Brasileira de Hematologia e Hemoterapia, 31(3).

  48. National Library of Medicine. (2023). Vitamins. MedlinePlus.