Yarrow's botanical name, Achillea, directly references the Greek hero Achilles, who according to legend used the plant to treat his soldiers' battle wounds — a naming convention that reflects yarrow's ancient and widespread reputation as the quintessential wound-healing herb across European and later broader Western herbal traditions.
Beyond wounds, yarrow developed a parallel traditional reputation for women's health, particularly menstrual complaints, and for supporting digestion — a genuinely broad traditional profile that modern research has tested with real, if uneven, results.
Yarrow has real, positive human randomized controlled trial evidence specifically for menstrual pain. A double-blind clinical trial published in the Journal of Pediatric and Adolescent Gynecology found yarrow tea significantly reduced pain severity in women with primary dysmenorrhea, with results holding up compared to placebo at both one and two months of use. A separate clinical trial testing yarrow extract in women with premenstrual syndrome over three months found meaningful reductions in overall symptom severity and pain scores.
Yarrow's oldest and most famous traditional claim — wound healing — rests on a notably thinner human evidence base by comparison: available support largely consists of animal studies rather than clearly citable human RCTs. Given genuine, replicated double-blind human trial evidence for menstrual pain specifically, but its more famous wound-healing reputation resting mainly on animal research, "Limited-Moderate" reflects both findings honestly.
Above-ground flowering parts dried and brewed as tea, or prepared as tincture and topical poultice for wounds.