Your metabolism is your body’s core engine. Keep it strong, healthy, and fueled. Scientific evidence demonstrates that ketones support effective metabolic function over time. Metabolic Switch was developed in partnership with the Buck Institute for Research on Aging. Each serving of C6 Ketone Di-ester, a self-affirmed GRAS (Generally Recognized as Safe) substance, naturally raises the levels of ketones in the blood to quickly generate a state of ketosis that lasts for several hours.