What it is
Oenothera biennis oil is the oil obtained from the seeds of the evening primrose plant. It is notable for its content of essential fatty acids, including linoleic acid and gamma-linolenic acid (GLA), and is used in cosmetics as an emollient and skin-conditioning oil. In sun care it helps soften the skin and enrich the oil phase of a formula.
Safety & warnings
Evening primrose oil is generally well tolerated and is not a known fragrance allergen. As a plant oil it can oxidize over time, and like many seed oils it may feel rich on oily or acne-prone skin, so individuals prone to congestion may prefer lighter alternatives.
Origin & sourcing
Natural. It is a fixed oil cold-pressed or solvent-extracted from the seeds of Oenothera biennis (evening primrose), a flowering plant native to the Americas and now widely cultivated.
Questions everyone asks
What makes evening primrose oil notable?
It is rich in essential fatty acids, including linoleic acid and gamma-linolenic acid, which contribute to its emollient, skin-softening role in cosmetics.
Does evening primrose oil block UV rays?
No. It is a conditioning plant oil, not a UV filter, so it does not provide sun protection.