Purefit Keto This randomized, double-blind, placebo-controlled study took place over a 12-week period and included 30 subjects at a dose of 250 mg of 10% Purefit Keto extract twice daily. The data resulting from this study appeared very promising, with subjects who showed the following: A "significant decrease" in the percentage of body fat and overall body mass A "significant increase" in the muscle mass of the body; in addition to A change in bone mass, suggesting an increase in bone density. A "significant increase" in free testosterone levels All of these points were not just about Purefit Keto as a fat loss supplement but also as a natural way for men to boost their testosterone levels,