Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Yarrow (Achillea millefolium) has a long history of use in traditional herbal medicine, particularly within European and North American folk practices. It has been used for various purposes, including regulating menstrual cycles, reducing heavy menstrual bleeding, and alleviating menstrual cramps. These uses are largely based on the plant’s reputed ability to affect blood flow and inflammation, as well as its mild phytoestrogenic properties, though the evidence for direct effects on estrogen or the endocrine system is limited.

Scientific studies on yarrow’s effects on the estrogen system are sparse. While some laboratory and animal studies suggest potential anti-inflammatory and spasmolytic (muscle-relaxing) activities, these do not directly translate to proven benefits for hormonal balance or estrogen modulation in humans. The plant contains flavonoids and other compounds that may exhibit weak estrogen-like activity, but robust clinical trials validating yarrow’s effectiveness for supporting the estrogen body system are lacking. Thus, the primary justification for yarrow’s use in this context is traditional rather than scientific.

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