What the evidence says. Graded mixed: the 2013 Cochrane review found no significant reduction in hot flushes, yet later meta-analyses report a small, marginally significant benefit at ≥80 mg/day — so any effect is modest, inconsistent, and clouded by large placebo responses and industry funding. (Mixed evidence: Conflicting results across studies; benefit uncertain.)
What is Red Clover?
Red Clover (Trifolium pratense) is a joint and skin supplement used for menopausal hot flushes. NutriDex grades the human evidence as Mixed. Red clover is a phytoestrogen-rich legume whose isoflavones (mainly biochanin A and formononetin) weakly bind estrogen receptors, which is why it is sold for menopause. Evidence is genuinely split. The 2013 Cochrane review of phytoestrogens found no significant difference between red clover (Promensil) and placebo for hot flushes, while later meta-analyses found a small reduction of roughly 1.7–2 fewer flushes per day, often only at the borderline of statistical significance and driven by higher doses (≥80 mg/day) and longer trials. More consistent are modest lipid effects: a 2020 meta-analysis of 12 RCTs reported total cholesterol down ~12 mg/dL and LDL down ~11 mg/dL. Effects on bone density and other symptoms are weak and inconsistent. Trials are frequently short, small, and industry-funded, with strong placebo responses, so red clover is best seen as a possible mild aid, not a reliable treatment.
Purported Benefits
✓Menopausal hot flushes
✓Lower LDL & total cholesterol
✓Slow menopausal bone loss
✓Skin & menopausal symptom support
Evidence by outcome
The same supplement can be well-proven for one use and unproven for another — here is the human evidence graded outcome by outcome.
Outcome
Evidence
Effect
Studies
Menopausal hot flushesCochrane found no benefit; later meta-analyses show ~1.7-2 fewer flushes/day, often borderline significance.
40–80 mg/day standardized red clover isoflavones (e.g. Promensil, Rimostil) for 12 weeks to 1 year.
Active Compounds
Isoflavones (biochanin A, formononetin)Genistein & daidzeinCoumestrol
Safety & Cautions
⚠
Generally well tolerated; reported effects include mild headache, nausea and rash, with red clover isoflavones used safely in studies up to 2–3 years. Because the isoflavones are estrogenic, avoid in pregnancy and breastfeeding and use caution if you have an estrogen-sensitive condition (breast, uterine or ovarian cancer, endometriosis, fibroids), though human data so far show no clear harm to breast or endometrial tissue. Coumarin-related constituents may add to bleeding risk, so use caution with anticoagulants/antiplatelets (warfarin, aspirin); it may also interact with tamoxifen, hormonal therapies and drugs metabolized by CYP enzymes. Educational only — always check with your doctor or pharmacist before combining Red Clover with any medicine.
Red Clover drug interactions
Known or theoretical interactions between Red Clover and common medications — educational, not exhaustive. Always check with your doctor or pharmacist before combining Red Clover with any medicine.
Red clover has estrogen-like activity; use caution with hormone therapy, tamoxifen, or hormone-sensitive cancers.
Red clover isoflavones are structurally similar to estrogen and may bind estrogen receptors, potentially affecting hormone-sensitive tissue. NCCIH — Red Clover
Red Clover is most often taken for Menopausal hot flushes, Lower LDL & total cholesterol, Slow menopausal bone loss, Skin & menopausal symptom support. Isoflavone herb marketed for hot flushes; trials are inconsistent.
Does Red Clover work — what does the evidence say?
Mixed evidence. Conflicting results across studies; benefit uncertain. Red clover is a phytoestrogen-rich legume whose isoflavones (mainly biochanin A and formononetin) weakly bind estrogen receptors, which is why it is sold for menopause. Evidence is genuinely split. The 2013 Cochrane review of phytoestrogens found no significant difference between red clover (Promensil) and placebo for hot flushes, while later meta-analyses found a small reduction of roughly 1.7–2 fewer flushes per day, often only at the borderline of statistical significance and driven by higher doses (≥80 mg/day) and longer trials. More consistent are modest lipid effects: a 2020 meta-analysis of 12 RCTs reported total cholesterol down ~12 mg/dL and LDL down ~11 mg/dL. Effects on bone density and other symptoms are weak and inconsistent. Trials are frequently short, small, and industry-funded, with strong placebo responses, so red clover is best seen as a possible mild aid, not a reliable treatment.
What is the typical dose of Red Clover?
40–80 mg/day standardized red clover isoflavones (e.g. Promensil, Rimostil) for 12 weeks to 1 year.
Is Red Clover safe? Any cautions or side effects?
Generally well tolerated; reported effects include mild headache, nausea and rash, with red clover isoflavones used safely in studies up to 2–3 years. Because the isoflavones are estrogenic, avoid in pregnancy and breastfeeding and use caution if you have an estrogen-sensitive condition (breast, uterine or ovarian cancer, endometriosis, fibroids), though human data so far show no clear harm to breast or endometrial tissue. Coumarin-related constituents may add to bleeding risk, so use caution with anticoagulants/antiplatelets (warfarin, aspirin); it may also interact with tamoxifen, hormonal therapies and drugs metabolized by CYP enzymes.
How many studies support Red Clover?
NutriDex cites 9 sources for Red Clover, graded "Mixed".
Does Red Clover interact with any medications?
Yes — known or theoretical interactions include: Blood thinners (warfarin, DOACs) (caution), Hormone therapy / tamoxifen (caution). This is educational and not exhaustive; always check with your doctor or pharmacist before combining Red Clover with any medicine.
Cite this page
APA
Peh, D. (2026). Red Clover (Trifolium pratense): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 16 Sept 2026, from https://nutridex.info/s/red-clover
BibTeX
@misc{nutridex_red_clover,
author = {Peh, Daryl},
title = {Red Clover (Trifolium pratense): Benefits, Dosage, Side Effects \& Evidence},
year = {2026},
howpublished = {NutriDex --- The Supplement Research Compendium},
url = {https://nutridex.info/s/red-clover},
note = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-09-16}
}
For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.