Are you confused as to which brand of Keto OS to buy? We hope this review can help you choose. This product by Pruvit comes in a Swiss Cacao and Maui Punch flavors. Keto OS Max can help you achieve ketosis because of its Beta-Hydroxybutyrate (BHB) content. This formula is for people who wish to get into a ketogenic state by having ample blood ketone levels even after taking some carbs. Introducing exogenous ketones to the body can boost blood ketone levels, which is the precursor to ketosis. When combined with working out, it will help you lose fat safely and efficiently, and help boost testosterone levels.