Cold pressed from the seed. Borage oil is the richest source of gamma linolenic acid (GLA) containing up to 25%, which is more than twice as much as occurs in Evening Primrose oil. Clinical trials have shown that GLA helps to encourage healthy, mobile joints, and used regularly on the skin it helps to soften fine lines and wrinkles. Add 10% - 15% to other carriers to give blends a boost, or use it undiluted as an intensive night-time treatment