Jenna Jameson lost 57 pounds on the keto diet - a doctor weighs in

Yet another celeb is touting the weight-loss benefits of the ketogenic diet, with former adult film actress Jenna Jameson sharing on Instagram that she dropped 57 pounds, dropping from a 16 to a six in pants size, in less than four months, courtesy of the high-fat, low-carb diet. That's almost 15 pounds a month, which is sorta ridiculous (and not necessarily in a good way).