When I was lifting more in college, I'd bulk for a month and cut fat for a month. My method was "protein-sparing modified fast", where it's still an absolutely

When I was lifting more in college, I'd bulk for a month and cut fat for a month. My method was "protein-sparing modified fast", where it's still an absolutely massive cut in calories, but you do consume protein and continue to lift. The only thing you eat is protein, I was taking about 1400 calories per day of just whey powder. I'd usually manage to cut about 20 lbs in the 30 days. I would like to add that it's impossible to fast and add muscle mass at the same time. To add muscle you need an abundance of calories since you're literally building new parts of your body from food. If you're fasting, even if you're taking BCAAs, you don't have the extra calories to spend adding muscle, your body will use any available calories to retain, not build, muscle. You might think you're adding muscle because your tone is revealed as you become dehydrated and/or burn off extra fat, which might fool you into thinking your muscles are getting bigger. They're not.