Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Fern-leaf yarrow (Achillea filipendulina) is closely related to the common yarrow (Achillea millefolium), which has a long history of traditional use in supporting capillary and circulatory health. In traditional herbal medicine, yarrow has been used for centuries to treat wounds, stop bleeding, and support blood vessel health. The name "Achillea" itself refers to the Greek hero Achilles, who, according to legend, used yarrow to treat his soldiers’ wounds. The plant contains flavonoids and other compounds thought to strengthen capillary walls and reduce fragility, which is why it is traditionally considered to support the capillary system.

However, most of the historical evidence and studies have focused on Achillea millefolium, not specifically the fern-leaf yarrow (Achillea filipendulina). There are few, if any, modern clinical studies specifically on fern-leaf yarrow’s effect on capillaries. The evidence supporting its use is therefore primarily traditional, with extrapolation from related species and their phytochemistry. The overall support for its efficacy in capillary health is moderate based on traditional use, but lacking in direct scientific validation.

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