Oenothera Biennis Oil Best Emollient Hydration Anti-Ageing Soothing Oenothera Biennis Oil description _Oenothera biennis_ oil (common name evening primrose oil) is a non-fragrant plant oil whose fatty acids can have significant skin-soothing and emollient benefits. It can also help other ingredients absorb more readily into skin. Related ingredients: Evening Primrose Oil