i will coincide my fasting (12-16 hours) with my labs. When I fast I dont give a crap about loosing muscle its only 16 hours, its about internal health and giving our organs a rest. I drink water with lemon that's it. I absolutely feel fantastic when i fast and so does in internals. Fasting is not about muscle it about health and giving our bodies a rest. we as body builders consume alot more protein and chemicals and overall calories than anyone else. and at my age 52, 6'4" 280 with my rx use I take internal rest as one of my priorities. Its one of the best and easiest things we as body builders can do for our selves, youngsters take note.