Evening Primrose oil
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An oil pressed from the seeds of the evening primrose plant, notable for its content of gamma-linolenic acid (GLA), an omega-6 fatty acid.
Why it’s used
Taken for claims related to skin conditions such as eczema, premenstrual symptoms, and menopausal hot flashes.
What the evidence says
Per NIH NCCIH, rigorous clinical trials of evening primrose oil for eczema, PMS, and menopausal symptoms have generally found no meaningful benefit over placebo, despite its long history of traditional use for these purposes.
Dose studied
2–4 g — common daily doses used in trials for skin and premenstrual symptom outcomes.
Context
Trials in this area have commonly used oil supplying roughly 2 to 4 grams of GLA-containing oil per day over several weeks to months, without consistent benefit being demonstrated.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.