Evening primrose oil contains an omega-6 essential fatty acid called gamma-linolenic acid (GLA), which is believed to be the active ingredient. Benefits of evening primrose oil in the treatment of arthritis have not been clearly shown. More information is needed before a recommendation can be made.
Avoid if allergic to plants in the Onagraceae family (willow's herb, enchanter's nightshade) or gamma-linolenic acid. Avoid with seizure disorders. Use cautiously if taking mental illness drugs. Stop use two weeks before surgery with anesthesia. Avoid if pregnant or breastfeeding.
Copyright 2007 Natural Standard, Inc.
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