Evening primrose oil has been widely used in the treatment of breast pain, also known as breast tenderness or mastalgia. Evening primrose oil is rich in gamma-linolenic acid (GLA), which is very important for woman´s health. It is believed that women, who suffer from cyclical breast pain, have low levels of gamma-linolenic acid (GLA) and consumption of evening primrose oil may help to compensate lack of own GLA. Research showed a difference in breast pain improvement with the treatments by evening primrose oil. 
Why evening primrose oil can help with cyclic breast pain
Breast pain is very common: in fact, nearly 70 percent of women suffer from breast pain. Breast pain can be subdivided into two types: cyclic and non-cyclic. Cyclic breast pain develops in the days before a period. Pain can occur in one or both breasts (although the cyclic pain in most of the times is felt in both breasts), or in the underarm.
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