Evening primrose oil is a rich source of gamma linolenic acid (GLA), a precursor to a hormone-like substance called PGE1. PGE1 may play a role in reducing PMs, promoting skin health, and calming skin inflammation. It may also help with joint pain and hormone balancing effects. Additionally, it contains omega 6 fatty acid and vitamin E, which protects cells against oxidative stress. This product comes in a 60-capsule pack, with two 30-capsule twin packs.