Hello! Evening primrose oil is rich in GLA(γ- linolenic acid). γ -linolenic acid is an essential fatty acid, which cannot be synthesized by itself in human body and must be taken in from outside. GLA is "processed" into a hormone-like substance in human body, which can relieve women's menstrual discomfort, such as abdominal pain, headache, backache, fatigue and emotional anxiety. For menopausal women, GLA can relieve menopausal symptoms. GLA can also maintain the health of cell membrane, make cells keep more water, and have excellent effects on improving dry and itchy skin, keeping skin healthy and preventing hair loss. Adult women over the age of 18 who have the above improvement needs can eat eleven boxes of New Zealand evening primrose oil soft capsules.