Ingredient guide
Red clover supplies isoflavones, plant compounds that act like weak estrogen, and is sold for menopausal hot flushes. Meta-analyses show a modest reduction in hot flushes, clearest in women with frequent symptoms, though results are mixed.
Mixed evidenceRed clover is a flowering plant in the legume family. Its supplement value comes from isoflavones, the same class of plant compounds found in soy. Isoflavones are sometimes called phytoestrogens because they can attach to estrogen receptors in the body and produce a weak estrogen-like signal. That is why red clover is marketed for menopause.
During menopause, falling estrogen drives symptoms like hot flushes. The idea behind red clover is that its isoflavones can step into some of the estrogen receptors and produce a gentle, partial estrogen effect. That same activity, however, is the reason for caution in people whose conditions are sensitive to estrogen.
The evidence is mixed but leans slightly positive. A meta-analysis of trials found that red clover reduced the daily number of hot flushes compared with placebo, with the strongest effect in women having five or more hot flushes a day, at isoflavone doses of 80 mg or more, over about 12 weeks. Effects on hormones themselves were small.
Other reviews note that benefits seen at three to four months did not always persist to a year, and that some trials show no effect. We grade the overall evidence as mixed. Red clover may ease frequent hot flushes for some women, but the effect is modest and the estrogen-like activity calls for medical input in many situations.
Menopause trials use extracts providing around 40 mg to 80 mg of isoflavones per day, with the better results at the higher end over about 12 weeks. Because the isoflavones act like estrogen, anyone with a hormone-sensitive condition, or who takes hormone therapy or tamoxifen, should clear it with a healthcare provider first.
Trials commonly use red clover extracts providing around 40 mg to 80 mg of isoflavones per day, with the better hot-flush results at the higher end over about 12 weeks. Benefits seen at 3 to 4 months did not always last to 12 months. Ask your healthcare provider before use, especially with a hormone-sensitive condition.
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They are plant compounds that can act like a weak form of estrogen in the body. Red clover and soy are common sources, which is why both are used for menopause.
It is generally well tolerated, but its estrogen-like activity means people with hormone-sensitive conditions should check with a doctor before using it.
Trials usually run about 12 weeks. Any benefit tends to appear within a few months, though it does not always last to a year.