A natural source of GLA Contains vitamin B6 which contributes to the regulation of hormonal activity Rapid release soft gel capsules Holland & Barrett Natural Evening Primrose Oil Capsules 1300mg plus Vitamin B6 provides the fatty acids Linoleic Acid (LA) and Gamma Linoleic Acid (GLA). Not all fatty acids can be made in the body so must be supplied through diet or supplementation. Within the body Linoleic Acid is metabolised to GLA, which is essential for the production of certain hormone-like substances called prostaglandins. Human breast milk is one of the richest natural sources of GLA, whilst LA can be found in safflower, hemp and sunflower oils. A natural source of GLA Contains vitamin B6 which contributes to the regulation of hormonal activity Rapid release soft gel capsules Holland & Barrett Natural Evening Primrose Oil Capsules 1300mg plus Vitamin B6 provides the fatty acids Linoleic Acid (LA) and Gamma Linoleic Acid (GLA). Not all fatty acids can be made in the body so must be supplied through diet or supplementation. Within the body Linoleic Acid is metabolised to GLA, which is essential for the production of certain hormone-like substances called prostaglandins. Human breast milk is one of the richest natural sources of GLA, whilst LA can be found in safflower, hemp and sunflower oils.