i know your asking this for 3J but i can say that i dont know exactly what the ketogenic diet consists of, but if it puts you actually into ketosis , then theres a solid chance your going to burn off some muscle to if your not spot on careful and even then you'll likey eat some muscle. Im speaking on being in actual ketosis though, where your smelling ammonia through the day, but again im not sure exactly what the ketogenic diet your speaking about consists of.
can you elaborate what it is, for others and myself, as ive seen various listing for the same diet name.