 [ Symptoms ] 5 year old daughter has leg pain doctors suggested haematology & serology [ Disease ] this is a really interesting question while i do not know if the diets that claim to boost brown fat are legitimate there does seem to be something in brown fat itself brown fat is the kind of fat that burns calories and keeps us warm and actually works for our body instead of just sitting there as a fuel reserve info about what brown fat is <link> more about brown fat <link> brown fat diet <link>