carlos gracie copied and adapted a nutritional regimen, from the argentinean/french naturist juan esteve dulin, and is now marketed as the gracie diet. following the hippocratean maxim "let your food be your remedy", carlos aimed this diet to a system that would primarily prevent illness on days of competition. the basic principle of the gracie diet is to keep blood ph level neutral by consuming only compatible nutrients at each meal. the gracie diet is flexible but it definitely prohibits consumption of pork and its derivatives and adopts abstinence from alcohol and tobacco.