Supports Glucose and Lipid Levels Already Within the Normal Range Combined with MCT Oil for Optimal Berberine Absorption Berberine is a natural constituent of herbs such as goldenseal, Oregon grape, and barberry. Clinical studies have demonstrated that berberine helps to support already normal glucose and lipid metabolism. Because berberine is known for its limited bioavailability, this product includes caprate (C10, a medium-chain triglyceride) to promote optimal absorption and maintenance of gastrointestinal comfort during berberine supplementation.