Evening Primrose (onethera biennis) is a biennial herb that has gained recognition in the scientific world because of its precious seed oil. One of the most potent evening primrose oil supplements available containing rich levels of the omega-6 nutrient GLA to help maintain hormonal balance and smooth, healthy looking skin. Efamol Evening Primrose Oil contains 33% more Gamma Linolenic Acid (GLA) than most other evening primrose oils. With vitamin E. It maintains health of skin, hair and nails, being not only an essential element of the skin structure, but also a precursor of prostaglandins, which have an important role to play in the maintenance of healthy skin. It is free from sodium, sugar, starch, gluten, yeast, wheat and dairy.