Does red clover help menopause symptoms?

Our verdict: Not recommended as a treatment for hot flashes.

Red clover extract (marketed under names like Promensil) is one of the most studied botanical supplements for hot flashes, because it contains isoflavones similar to those in soy. A comprehensive 2013 Cochrane systematic review — examining 43 randomized trials of phytoestrogens in 4,364 women — pooled the 5 trials that used red clover extract and found no significant difference in hot flush frequency compared with placebo (mean difference -0.93, 95% CI -1.95 to 0.10).

The review's bottom line, and one nuance worth knowing

The Cochrane authors' overall conclusion, across all phytoestrogen types examined: "no conclusive evidence shows that phytoestrogen supplements effectively reduce the frequency or severity of hot flushes and night sweats".

One nuance: 4 separate trials (not combined into the main pooled analysis) using extracts with high levels of genistein (another isoflavone, above 30mg/day) showed more consistent reductions in hot flush frequency, which the review's authors said deserves further investigation. That's a different, more concentrated extract than standard red clover products — it doesn't change the verdict on red clover itself, but it's a reason this area of research isn't entirely closed.

Why it can feel like it's working

The same review noted a strong placebo effect across most trials, with hot flush reductions of 1% to 59% in placebo groups. That's a meaningful part of why red clover and similar supplements can feel effective in everyday use even when controlled trials don't show a real benefit over placebo.

Is it at least safe?

The review found no evidence of estrogenic stimulation of the endometrium or vagina, or other adverse effects, in trials using these supplements for up to two years. However, people with a personal history of breast cancer were excluded from the underlying trials, so this doesn't establish safety for that group — see our menopause after breast cancer guide, and check with your oncologist before taking any phytoestrogen supplement.

What has stronger evidence instead

See our soy and isoflavones and black cohosh verdicts for other commonly marketed botanicals, or our non-hormonal treatments overview for Level I prescription and behavioral options. Track your own symptoms in our private symptom tracker before and after trying any supplement, so you can judge the effect for yourself rather than relying on impression alone.