Ketosis is a metabolic state where most of the body's energy supply comes from ketone bodies in the blood, in contrast to a state of glycolysis where blood glucose provides most of the nergy. ketosis is sometimes referred to as the body's "fat burning" mode. Keto-OS by Pruvit is KETO//OS (Ketone Operating System) is a revolutionary drink mix that is based on a proprietary ketone energy technology that delivers advanced macro nutritionals and promotes optimized cellular regeneration, energy and longevity. KETO//OS(Ketone Operating System)by Pruvit is a revolutionary drink mix that is based on a proprietary ketone energy technology that delivers advanced macro nutritionals and promotes optimized cellular regeneration, energy and longevity. KETO//OS is a “First of its Kind” product. Prüvit’s proprietary formula has been researched, tested, and doctor approved. It is the first natural consumer product on the market to provide elevated blood ketone levels to the body.