One of the oils found in evening primrose and starflower (borage) seeds is Gamma-Linolenic Acid (GLA) which is frequently recommended by practitioners for those: at the time of their period, going through the menopause or concerned with the condition of their skin. We supply evening primrose oil on its own and in combination with starflower oil and provide both 500mg and 1000mg potencies. And we always choose only the finest quality oil with consistent GLA levels.