Coumestrol Dimethyl Ether

PhytochemicalIsoflavonoid

What is it

Coumestrol dimethyl ether is a methylated form of coumestrol, a phytoestrogen found in legumes such as alfalfa, clover, and soybean sprouts. It is uncommon in mainstream supplements.

How it works

Coumestans are a class of plant compounds with estrogen-receptor activity. Coumestrol binds both alpha and beta estrogen receptors with affinity in the range of weak natural estrogens. Methylation of coumestrol alters its receptor binding profile and metabolism. Human pharmacokinetic and clinical data for coumestrol dimethyl ether specifically are essentially absent. Most coumestan research focuses on coumestrol itself in the context of soy and clover phytoestrogen research.

Dosage

There is no established daily intake recommendation. Dietary coumestan intake from foods is typically below 1 mg per day in most populations.

When and how to take it

Dietary coumestans are consumed as part of regular meals. Supplement timing is not critical.

1 commercial form

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Coumestrol dimethyl ether

Uncommon in mainstream supplements. Most coumestan exposure comes from food sources like alfalfa and clover sprouts.

Not well characterized in human pharmacokinetic studies.

Safety

Phytoestrogens are generally well tolerated at dietary intakes. Concentrated supplement doses have less safety data, and theoretical concerns exist about hormone-sensitive conditions.

Who should be cautious

People with hormone-sensitive cancers, pregnancy, and breastfeeding should avoid phytoestrogen supplements without medical advice. People taking hormonal contraceptives or hormone replacement therapy should consult a clinician.

Interactions

Theoretical interactions with hormone therapies, tamoxifen, and other estrogen-modulating drugs. Limited formal interaction data.

Food sources

Alfalfa sprouts

Amount
1 cup
%DV
—

Soybean sprouts

Amount
1 cup
%DV
—

Frequently asked questions

Is coumestrol dimethyl ether a phytoestrogen?⌄

It is a methylated derivative of coumestrol, which is a phytoestrogen. The methylated form's activity profile in humans is not well characterized.

Is it safe?⌄

Specific safety data is limited. People with hormone-sensitive conditions should avoid concentrated supplements.

References

Coumestrol Dimethyl Ether on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Coumestrol Dimethyl Ether (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.