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Natural Supplements for Hormone Balance: What the Research Actually Shows

How diet influences estrogen and hormone balance.

By the Ration Editorial Team · Reviewed against primary research · Updated July 14, 2026

Key takeaways

  • Several popular supplements, including ashwagandha, fenugreek, and Tribulus terrestris, have been studied for effects on testosterone or cortisol, with mixed and often modest results
  • Ashwagandha appears to lower cortisol fairly consistently, but its effect on how stressed people actually feel is less clear[11]
  • Phytoestrogens like genistein and daidzein, and compounds like DIM, are being studied as options related to estrogen metabolism, particularly around menopause[10][7]
  • Evidence for deer antler velvet, shilajit, and maca remains early, mostly small trials or animal and lab studies

What do we mean by 'hormone' supplements?

Hormones are chemical messengers made by glands like the thyroid, adrenal glands, and gonads.

When people search for hormone supplements, they usually mean one of a few things.

No supplement replaces hormone therapy or addresses a diagnosed hormonal disorder. The research below looks at over-the-counter ingredients studied in healthy adults, not clinical hormone treatment.

Can supplements raise testosterone?

Testosterone-boosting supplements are among the most heavily marketed hormone products, and also among the most studied.

Ashwagandha (Withania somnifera) and fenugreek (Trigonella foenum-graecum) are two of the most common ingredients in these blends. A review looking at both noted possible increases in testosterone in some trials, but also flagged inconsistent study quality and potential clinical implications that deserve more scrutiny before drawing firm conclusions[4].

Fenugreek extract has also been studied in an animal model of benign prostatic hyperplasia, where it appeared to counter some effects of testosterone propionate on prostate tissue, hinting at a hormone-modulating role beyond simple testosterone boosting[5].

Tribulus terrestris is another long-standing folk remedy for low libido and erectile dysfunction. A systematic review of clinical trials found that Tribulus supplementation showed some benefit for erectile dysfunction symptoms in certain trials, but effects on measured testosterone levels were inconsistent across studies[6].

Maca (Lepidium meyenii), particularly black maca, has been studied for effects on semen quality and testosterone. One study in dogs found effects on sperm parameters and storage stability, though this is an animal model and cannot be directly generalized to humans[8].

Does ashwagandha actually lower cortisol?

Cortisol is the hormone most associated with stress, and ashwagandha is the supplement most associated with lowering it.

A systematic review and meta-analysis pooling multiple trials found a fairly consistent reduction in cortisol levels with ashwagandha supplementation[11].

Interestingly, the same analysis found no significant effect on perceived stress, meaning people's cortisol numbers dropped without a matching change in how stressed they said they felt[11].

This disconnect is worth sitting with. It suggests ashwagandha may have a real biochemical effect on the hypothalamic pituitary adrenal axis, even if it does not translate into people feeling noticeably calmer.

What about estrogen and menopause?

Phytoestrogens are plant compounds that loosely mimic estrogen in the body, and they are a major focus of research into natural menopause support.

Daidzein and genistein, two soy-derived isoflavones, have been reviewed for their potential role in hormone replacement therapy, with researchers exploring whether they could offer estrogen-like benefits with a different risk profile than conventional hormone therapy[10].

Separately, 3,3'-diindolylmethane (DIM), a compound derived from cruciferous vegetables like broccoli, has been studied in postmenopausal women using a transdermal estradiol patch. The study looked at how DIM affects estradiol and estrogen metabolism, an area of interest for people trying to influence how the body processes estrogen[7].

These are active research areas rather than settled science, and none of these compounds are interchangeable with prescribed hormone therapy.

What does the evidence say, ingredient by ingredient?

Beyond the major categories above, a handful of other ingredients show up often in hormone-focused supplements, with evidence at various early stages.

Are these supplements safe?

Safety data on hormone-related supplements is generally thinner than efficacy data, and much of what exists comes from short pilot studies rather than long-term trials.

The shilajit pilot study was specifically designed to check safety and blood biomarkers alongside performance outcomes, reflecting how early this research still is for many popular ingredients[2].

A few general safety points are worth keeping in mind.

Who might consider these supplements?

Given the state of the evidence, these ingredients are best thought of as areas of ongoing research rather than established treatments.

Bottom line

The science on hormone-related supplements is a mixed bag.

Ashwagandha's cortisol-lowering effect is one of the more consistent findings, even though it does not clearly reduce felt stress[11].

Testosterone-focused herbs like fenugreek and Tribulus terrestris show some promising signals in specific trials, but the overall evidence remains inconsistent[4][6].

Estrogen-related compounds like genistein, daidzein, and DIM are genuinely interesting research areas for menopause support, but they are being studied as topics of scientific inquiry, not as replacements for medical hormone therapy[10][7].

Newer entries like shilajit and deer antler velvet have the least human data of the group, resting mostly on small pilot studies or compositional analyses[2][1][3].

Frequently asked questions

Does ashwagandha lower testosterone or raise it?

Research has focused more on ashwagandha's effect on cortisol than testosterone directly, and reviews of testosterone-boosting blends note inconsistent evidence across studies that include ashwagandha[4][11].

Can supplements really lower cortisol?

A meta-analysis found that ashwagandha supplementation was associated with a fairly consistent reduction in cortisol levels, though it did not clearly reduce how stressed people felt[11].

Is Tribulus terrestris proven to boost testosterone?

A systematic review of clinical trials found inconsistent effects of Tribulus on measured testosterone levels, even though some trials showed benefits for erectile dysfunction symptoms[6].

Are phytoestrogens like genistein safe for menopause symptoms?

Genistein and daidzein are being actively studied as possible components of hormone replacement approaches, but this remains an area of ongoing research rather than a settled recommendation[10].

What is DIM and does it affect estrogen?

DIM (3,3’-diindolylmethane) is a compound from cruciferous vegetables studied in postmenopausal women using estradiol patches for its effects on estrogen metabolism, though research is still early[7].

Sources

  1. Data of small molecule compounds and insulin-like growth factor-1 (IGF-1) detected in Deer Antler Velvet of Malayan Deer (Cervus timorensis) · PMID 41459385
  2. Safety and Efficacy of TruBlk™ Shilajit Resin Supplementation on Physical Performance and Blood Biomarkers in Healthy Adults: A 28-Day Open-Label Pilot Study · PMID 41613504
  3. Deer antler velvet as a multifunctional natural resource for biomedical and nutraceutical applications · PMID 41925970
  4. Withania somnifera and Trigonella foenum-graecum as ingredients of testosterone-boosting supplements: Possible clinical implications · PMID 38628109
  5. Effect of Fenugreek Extract on Testosterone Propionate-Induced Benign Prostatic Hyperplasia · PMID 39941027
  6. Effects of Tribulus (Tribulus terrestris L.) Supplementation on Erectile Dysfunction and Testosterone Levels in Men-A Systematic Review of Clinical Trials · PMID 40219032
  7. The impact of 3,3'-diindolylmethane on estradiol and estrogen metabolism in postmenopausal women using a transdermal estradiol patch · PMID 40298801
  8. Effects of oral black Maca (Lepidium meyenii) supplementation on semen quality and refrigerated storage stability in subfertile and normofertile dogs: a study on sperm parameters and testosterone levels · PMID 40315173
  9. Saw Palmetto Extract Ameliorates Benign Prostatic Hyperplasia by Regulating 5α-Reductase and Apoptosis In Vitro and In Vivo · PMID 40395126
  10. Daidzein and Genistein: Natural Phytoestrogens with Potential Applications in Hormone Replacement Therapy · PMID 40725220
  11. Dual impact of Ashwagandha: Significant cortisol reduction but no effects on perceived stress - A systematic review and meta-analysis · PMID 40746175
  12. Discovery of Personalized Treatment for Immuno-Metabolic Depression-Focus on 11beta Hydroxysteroid Dehydrogenase Type 2 (11betaHSD2) and Toll-like Receptor 4 (TLR4) Inhibition with Enoxolone · PMID 41155634

What the research points to

Compounds and supplements studied for hormones, ranked by evidence quality. Each links to the studies on PubMed. Research associations only, not medical advice.

Compounds to know

All compounds
GoitrogensCompounds that interfere with thyroid hormone synthesis by blocking iodine uptake. Highest in raw cruciferous vegetables (broccoli, kale, cabbage, Brussels sprouts), soy, and cassava. Largely deactivated by cooking. Critical for thyroid health monitoring.