Testosterone — a sex hormone found in both men and women — is intrinsically tied to masculinity. It’s the hormone responsible for the masculinization of boys entering puberty, and it’s associated with everything from sexual virility to muscle and strength.1 So it’s no wonder that men suffering from sexual symptoms like erectile dysfunction (ED) or low libido, as well as those dealing with a dropoff in energy or fitness, might consider a testosterone-boosting supplement.2
Unfortunately, as with so many markets hoping to capitalize on male insecurity, there are far too many inferior products out there claiming to solve the problem. Many of these are overpriced and often contain poor ingredients at low doses. That’s the bad news. The good news is that there are around a dozen respectable companies producing recommendable testosterone boosters that should provide some effect for most men.
So, do testosterone boosters really work? Yes, some of them do, but they’re in the minority. The best out there contain complex formulas of well-researched ingredients delivered at sufficient doses to make a real difference. We’ll show you how to cut through the noise and find them.
The cool thing about high-quality testosterone supplements is that they can combine ingredients that boost testosterone in different ways.
When you can combine all of these mechanisms, you end up with more testosterone production and more free testosterone available for use in the parts of your body where you want it — namely, muscles, sex organs, and other systems impacted most severely by low testosterone.
Now that we've established that testosterone boosters can work if they contain the right ingredients, we have to look at what ingredients out there might actually boost testosterone, and what doses have been successful in studies. There are a few dozen common ingredients that our team has seen in multiple testosterone boosters, but not all of them have the scientific support to justify their presence.
Here’s a quick look at ingredients with scientific research backing their ability to boost testosterone:
Multiple studies support ashwagandha’s ability to boost testosterone. For example, a 2023 study showed improvements in both free and total testosterone after eight weeks with 600mg of ashwagandha extract daily.4 Another study used a more concentrated form of the extract (equivalent to about 420mg of the extract used in the above study) and found a nearly 15% increase in testosterone.5
While older research looked more into the correlation between serum zinc levels and testosterone, more recent research has tested zinc supplementation’s potential to boost testosterone levels.6 Those studies showed that doses of elemental zinc as low as 2.3mg could get the job done.7 You could get that much elemental zinc from around 8mg of zinc citrate or 16mg of zinc gluconate.
Vitamin D and testosterone have been linked in several studies similar to those looking at zinc, but there are fewer studies examining how supplementation with vitamin D could affect testosterone levels.8 That said, one study providing the equivalent of about 1600IU per day showed increases in testosterone levels,9 and since the tolerable upper limit for D supplementation is 4000IU daily, that’s a reasonable dose to add to various fortified foods and remain safe.10
Tongkat ali is a botanical ingredient with some very promising research behind it, including one study looking at 100mg and 600mg doses.11 In that study, both doses were effective, with the smaller dose taking a few more weeks to show results and the results from the larger dose being more dramatic. Other research using similar doses pointed toward improvements in testosterone and stress markers like cortisol levels.12
Boron appears to boost free testosterone with relatively small doses between 5mg and 10mg per day.17 However, the daily upper limit per the NIH is just 20mg, so it’s important that you don’t overdo it.
If you can find a testosterone booster that contains most or all of these ingredients at or near the doses shown to be effective in clinical research, then there’s a good chance it will work for you.
But as the zinc and ashwagandha sections hinted at, ingredient quantity is only part of the picture. Finer details of an ingredient, beyond quantity, can make a huge difference in effect and safety. For instance, the form of a mineral can effect how much elemental mineral is delivered to you. The potency of a botanical extract, not just its overall quantity, ought to be consistent with what research demonstrates to be safe and effective.
You might come across some testosterone boosters that have many of these ingredients but provide them at much lower doses. And you'll also find supplements that contain impressive quantities of wise botanical extracts that are nonetheless unbranded with no indication of their potency. In such cases, the companies are banking on the hopes that their supplements will have an impact that’s greater than the sum of their parts — or worse, trying to appear more impressive to you than they actually are. There’s no evidence to support the idea that underdosing and over-combining ingredients will result in positive outcomes. It’s better to have a streamlined ingredient list delivering clinically relevant doses with full transparency about their potencies.
With so many testosterone boosters on the market that we’d explicitly recommend you avoid, we’d like to share some common red flags in the testosterone booster market that can help you steer clear of potentially dangerous or ineffective supplements.
Here’s a quick list of red flags:
Compared to testosterone supplements, testosterone replacement therapy (TRT) is both likely to be more effective and likely to have more severe side effects.
For most men, starting with a supplement is a preferable route for starters because:
That said, men who’ve exhausted their options trying the best testosterone supplements or those who need immediate results to alleviate severe symptoms of hypogonadism might want to try TRT. Replacement therapy often involves intramuscular injections of testosterone cypionate or another form of testosterone. These injections can cause significant spikes and drops in testosterone, however, which can create mood swings and a resurgence of symptoms in the days between shots, especially early in treatment.18 They’re also associated with potentially severe adverse effects, including major cardiovascular complications.19
Transdermal testosterone is an alternative to injections, but there’s always the risk of spreading it to others in the household if you aren’t very careful with it. And exposure to testosterone in women and children can cause undesirable complications like early puberty or hypertrichosis.20
At the end of the day, TRT is a viable path for many men with clinical hypogonadism, but for men whose testosterone levels have taken a natural but subclinical dip, supplementation is the far better choice.
For most men experiencing symptoms related to low testosterone, the best testosterone boosters on the market contain ingredients that can make a genuine difference. There are a lot of inferior options out there, but a few companies combine effective ingredients at clinically relevant doses to improve testosterone levels in as little as eight weeks. If you’re curious to see if they can work for you, they’re likely worth a try.
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.
Nassar, G.N., & Leslie, S.W. (2022, January 4). Physiology, testosterone. Treasure Island (FL): StatPearls Publishing.
Mulhall J.P., Trost L.W., Brannigan R.E., et al. (2018). Evaluation and management of testosterone deficiency: AUA guideline. The Journal of Urology, 200, 423.
Hammond, G., Avvakumov, G., & Antonetti, Y. (2003). Structure/function analyses of human sex hormone-binding globulin: Effects of zinc on steroid-binding specificity. The Journal of Steroid Biochemistry and Molecular Biology, 85, 195-200.
Verma, N., Gupta, S. K., Tiwari, S., Mishra, A. K., Thakare, V., & Patil, S. (2023). Effect of ashwagandha root extract on serum testosterone and muscle recovery in strength training. International Journal of Medical and Pharmaceutical Research, 4(5), 371-381.
Lopresti, A. L., Drummond, P. D., & Smith, S. J. (2019). A randomized, double-blind, placebo-controlled, crossover study examining the hormonal and vitality effects of ashwagandha (Withania somnifera) in aging, overweight males. American Journal of Men's Health, 13(2), 1557988319835985.
Prasad, A. S., Mantzoros, C. S., Beck, F. W., Hess, J. W., & Brewer, G. J. (1996). Zinc status and serum testosterone levels of healthy adults. Nutrition (Burbank, Los Angeles County, Calif.), 12(5), 344-348.
Hunt, C. D., Johnson, P. E., Herbel, J., & Mullen, L. K. (1992). Effects of dietary zinc depletion on seminal volume and zinc loss, serum testosterone concentrations, and sperm morphology in young men. The American Journal of Clinical Nutrition, 56(1), 148-157.
Wehr, E., Pilz, S., Boehm, B. O., März, W., & Obermayer-Pietsch, B. (2010). Association of vitamin D status with serum androgen levels in men. Clinical Endocrinology, 73(2), 243-248.
Pilz, S., Frisch, S., Koertke, H., Kuhn, J., Dreier, J., Obermayer-Pietsch, B., Wehr, E., & Zittermann, A. (2011). Effect of vitamin D supplementation on testosterone levels in men. Hormone and Metabolic Research, 43(3), 223-225.
National Institutes of Health. (2024, July 6). Vitamin D fact sheet for health professionals. U.S. Department of Health and Human Services
Chinnappan, S. M., George, A., Pandey, P., Narke, G., & Choudhary, Y. K. (2021). Effect of Eurycoma longifolia standardised aqueous root extract–Physta® on testosterone levels and quality of life in ageing male subjects: A randomised, double-blind, placebo-controlled multicentre study. Food & Nutrition Research, 65.
Talbott, S. M., Talbott, J. A., George, A., & Pugh, M. (2013). Effect of tongkat ali on stress hormones and psychological mood state in moderately stressed subjects. Journal of the International Society of Sports Nutrition, 10, 28.
Wankhede, S., Mohan, V., & Thakurdesai, P. (2015). Beneficial effects of fenugreek glycoside supplementation in male subjects during resistance training: A randomized controlled pilot study. Journal of Sport and Health Science, 5(2), 176.
Poole, C., Bushey, B., Foster, C., Campbell, B., Willoughby, D., Kreider, R., Taylor, L., & Wilborn, C. (2010). The effects of a commercially available botanical supplement on strength, body composition, power output, and hormonal profiles in resistance-trained males. Journal of the International Society of Sports Nutrition, 7, 34.
Roshanzamir, F., & Safavi, S. M. (2017). The putative effects of D-Aspartic acid on blood testosterone levels: A systematic review. International Journal of Reproductive Biomedicine, 15(1), 1.
Melville, G. W., Siegler, J. C., & Marshall, P. W. (2015). Three and six grams supplementation of d-aspartic acid in resistance trained men. Journal of the International Society of Sports Nutrition, 12, 15.
Naghii, M. R., Mofid, M., Asgari, A. R., Hedayati, M., & Daneshpour, M. S. (2011). Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokines. Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS), 25(1), 54-58.
Pope H.G., Kouri E.M., & Hudson J.I. (2000). Effects of supraphysiologic doses of testosterone on mood and aggression in normal men: A randomized controlled trial. Archives of General Psychiatry, 57(2), 133-140.
Grech, A., Breck, J., & Heidelbaugh, J. (2014). Adverse effects of testosterone replacement therapy: An update on the evidence and controversy. Therapeutic Advances in Drug Safety, 5(5), 190.
García García, E., & Jiménez Varo, I. (2017). Potential consequences in children of a testosterone gel used by their fathers. Posibles consecuencias en los niños del uso de gel de testosterona por sus padres. Endocrinologia, diabetes y nutricion, 64(5), 278-280.