Supplement analysis backed by scientific evidence · PT

← All supplements
Limited evidenceGeneral health

Yarrow

A traditional herb for fevers, wounds and bleeding. Modern trials of it are few, small, and about entirely different outcomes than the traditional ones.

Evidence last reviewed: August 2026

What the science says

  • Liver enzymes and lipids in type 2 diabetes Limited evidence

    A double-blind randomised trial in patients with type 2 diabetes reported improved liver enzymes and lipid profile with Achillea millefolium capsules versus placebo. It is one small single-centre trial and needs replication before it means anything for practice.

  • Vulvovaginal candidiasis Limited evidence

    A randomised controlled trial comparing a yarrow preparation with clotrimazole for vulvovaginal candidiasis reported comparable symptom improvement. The trial was small, and comparison with an active drug without a placebo arm makes the result hard to interpret.

  • Traditional uses remain untested Limited evidence

    The classic indications, stopping bleeding and breaking fevers, have no controlled human trials at all. What clinical research exists has gone elsewhere.

Dosage & safety

Studied doseNo consensus dose. The diabetes trial and traditional practice both sit around 1–3 g/day of dried herb, taken as an infusion or in capsules; tincture is usually 2–4 mL three times daily.
SafetyAn Asteraceae plant, so cross-reactivity with ragweed, chamomile and chrysanthemum allergy is possible, and contact dermatitis and photosensitivity are reported. It contains small amounts of thujone and is a traditional emmenagogue, so avoid in pregnancy. Theoretical additive effect with anticoagulants; stop before surgery.

Scientific references

Where to buy

View on iHerb

Referral link — this site may earn a commission on purchases.

Related in General health