Naringin - flavonid glycoside occurring in grapefruit and bitter orange, metabolized in the body to form of narginin. Metabolism provides nutritional, antioxidant and lowering bad cholesterol activity. Lowering the level of cortisol (stress hormone), it has catabolic effects on muscle tissue, but it can negatively affect the insulin metabolism. Naringin included in the extracts of citrus fruits, vitaminizing, fat burners, creatine stacks and nitrogen boosters.