Testosterone boosters are a popular category of dietary supplements, but the research surrounding their effectiveness is often inconclusive. If you’re experiencing symptoms like erectile dysfunction or depression, it’s crucial to consult with a healthcare professional before trying any testosterone boosters.
Understanding Testosterone Boosters
Testosterone is a vital hormone that plays a key role in male sexual health, muscle mass, bone density, and overall well-being. Testosterone boosters aim to improve the levels of this hormone, which naturally declines by about 1% per year after the age of 30[1]. While the idea of naturally boosting testosterone lost due to aging, obesity, or lifestyle choices like drinking alcohol has gained attention, the scientific evidence behind these supplements is often spotty.
A Note on Testosterone Booster Research
Despite many products on the market, viable research on proprietary blends is lacking. Most studies focus on the effects of individual ingredients rather than complete formulations. A 2019 review[2] identified several ingredients commonly found in these supplements, including:
- Tongkat ali extract
- Horny goat weed
- Saw palmetto extract
- Boron
- Nettle extract
- Maca root powder
- Ashwagandha root extract
- Fenugreek
- Bioperine
- DIIM
This same review noted that only 30% of testosterone booster supplements list clinical doses of their ingredients[2]. While these products may work for some individuals, more comprehensive research is needed to evaluate their safety and effectiveness for the larger population.
Why Do Healthy Testosterone Levels Matter?
Maintaining normal blood levels of testosterone, typically considered 300 nanograms per deciliter (ng/dL) or higher[3], may help prevent symptoms associated with low testosterone. These levels depend on your age, and experts recommend[3] that they be interpreted within the context of clinical symptoms.
Some nutrients and herbal extracts used as natural testosterone boosters have been linked to additional health benefits, including:
However, more research is still needed to fully understand the effectiveness and potential benefits of these supplements.
Key Ingredients in Testosterone Boosters
1. Ashwagandha
What it is: Ashwagandha is an adaptogenic herb used in Ayurvedic medicine that helps the body manage stress and anxiety[7].
Research: A 2022 study[8] found that men with normal testosterone levels who took 300 mg of ashwagandha root extract twice daily for 16 weeks experienced increased testosterone levels. A 2019 study[9] involving 40-70 year old men showed that 12 weeks of supplementation with a high-concentration ashwagandha root extract led to an 18% increase in DHEA-S (a precursor to testosterone) and a 15% increase in testosterone. However, these effects were not sustained over time[9], and researchers aren’t sure exactly how ashwagandha works to support hormonal health.
2. Vitamin D
What it is: Vitamin D is a fat-soluble vitamin that functions as a steroid hormone in the body and is essential for male sexual function[10]. Low vitamin D is extremely common and more likely[11] to affect older adults and people with darker skin.
Research: Some research[12] suggests that vitamin D supplementation may increase testosterone levels in people with vitamin D deficiency. A 2020 study[13] found that vitamin D supplementation increased testosterone levels in vitamin D-deficient men. However, other studies[14] have found no significant effects. Given vitamin D’s importance for bone health (preventing osteoporosis[15]) and mental health (potentially reducing depression[16]), maintaining adequate levels is beneficial for overall health.
Dosage: While research on the best dosage specifically for testosterone support is lacking, most guidelines recommend 400–2,000 international units (IU)[17] daily for maintenance. People with low or deficient levels may require[11] higher doses under medical supervision.
3. Fenugreek
What it is: Fenugreek is a popular herb used in cooking and alternative medicine that may support healthy testosterone levels.
Research: In a 2016 study[18], men who took 600 mg of fenugreek extract daily for 12 weeks experienced significant increases in testosterone levels and improvements in sexual function compared with those taking a placebo. A small 2017 study[19] found that 5 of 6 studies reviewed showed significant improvements in testosterone levels with fenugreek supplementation. The authors of a 2020 review[20] concluded that fenugreek may work by inhibiting enzymes[21] that convert testosterone to estrogen. Despite these promising findings, larger and longer-term studies are needed.
4. Zinc
What it is: Zinc is an essential mineral involved in more than 100 chemical processes within the body, including those related to male sexual health.
Research: The authors of a 2018 review[22] noted that zinc plays a critical role in men’s sexual health and fertility. A 2023 review[23] found that zinc supplementation increased testosterone levels in both men and women. Additionally, a 2021 study[24] involving men with low testosterone levels found that taking 30 mg of zinc daily for 60–90 minutes of exercise 3 times per week for 4 weeks increased testosterone levels.
Safety & Side Effects
While some natural testosterone boosters show promise, research on their long-term safety and effectiveness is limited. Many popular products contain a wide range of herbal ingredients or other compounds, some of which could interact with certain medications and health conditions.
It’s important to never self-diagnose low testosterone. Several health conditions share symptoms with low testosterone, and diseases like hypothyroidism and certain cancers can actually cause low testosterone. Always seek professional medical advice if you’re experiencing symptoms that may be related to low testosterone.
Dosage & How to Use
When considering testosterone boosters, it’s essential to:
- Consult with a healthcare professional before starting any supplement regimen
- Choose products with research-supported ingredients at clinical doses
- Look for third-party testing from organizations like NSF International, United States Pharmacopeia (USP), or Informed Choice
- Consider single-ingredient supplements rather than proprietary blends
The Bottom Line
A wide range of testosterone booster supplements is available, but only a few have significant research to support their use. Some ingredients like fenugreek seed extract and ashwagandha root[25] are better researched than others. These supplements may have noticeable benefits primarily in people with fertility issues or clinically low testosterone levels.
The most effective way to maintain healthy testosterone levels involves lifestyle modifications: following a nutritious diet rich in antioxidants, maintaining a moderate weight, avoiding smoking and heavy drinking, and managing stress. If you suspect you have low testosterone, consult with a healthcare professional for proper diagnosis and personalized treatment recommendations.
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References
Citations
[1] Age-related testosterone decline
[2] 2019 review of testosterone booster ingredients
[3] Testosterone Levels and Interpretation
[4] Improvements in sperm health
[6] Increased exercise performance
[10] Vitamin D and male sexual function
[11] Vitamin D deficiency risk factors
[12] Vitamin D and testosterone research
[13] 2020 vitamin D study
[14] Studies showing no vitamin D effect
[15] Vitamin D and osteoporosis
[17] Vitamin D dosage recommendations
[18] 2016 fenugreek study
[19] 2017 fenugreek study
[21] Fenugreek enzyme inhibition
[22] 2018 zinc review
[23] 2023 zinc review
[24] 2021 zinc study