Is there estrogen in evening primrose oil

Evening primrose oil is rich in gamma-linolenic acid (GLA), an essential fatty acid involved in the production of hormone-like substances called prostaglandins. By increasing production of prostaglandins, EPO is thought to help counter hormonal changes associated with menopause.One of the most important ingredients in evening primrose oil is gamma-linolenic acid (GLA), which is also found in other plant-based oils. The recommended dose of evening primrose oil is 8 to 12 capsules a day, at a dose of 500 milligrams per capsule.Evening primrose oil comes in capsules, which can be taken orally or inserted vaginally. While there is no standard dosage, it's standard to take 500 to 2000 milligrams daily after the 38th week of pregnancy has begun. If you choose to use EPO, always start with very low doses.Both herbs were effective in reduction of severity of hot flashes and improvement of the quality of life, but it seems that black cohosh is more effective than primrose oil because it was able to reduce the number of hot flashes too.