Evidence

Research on evening primrose use for specific conditions shows:

• Atopic dermatitis (eczema). Research on oral use of evening primrose oil to treat eczema has produced conflicting results. The most comprehensive evaluation is that evening primrose taken orally doesn't effectively relieve the signs and symptoms of eczema.
• Diabetic neuropathy. Research on the use of evening primrose oil to treat this type of nerve damage that can occur if you have diabetes has been inconclusive.
• Premenstrual syndrome (PMS). Research suggests no benefit for oral use of evening primrose oil to treat symptoms of PMS.