The seeds of the evening primrose plant yield an oil high in gamma-linolenic acid (GLA), an omega-6 fatty acid. GLA supports the body's inflammatory response and helps maintain the skin's natural barrier. People take the oil to soothe dry or sensitive skin, smooth hormonal shifts during menstrual cycles or menopause, and ease joint discomfort.
Capsules are the usual form, taken with meals because fat helps absorption. Daily doses fall between 500 mg and 2000 mg, adjusted to the GLA strength listed on the label. Feeling a difference often takes several weeks of steady use. The oil can trigger mild stomach upset or loose stools for some. Anyone taking blood thinners or with a seizure history should check with a clinician before starting.