Just ask any competitive bodybuilder how to lose fat without losing much muscle and they will tell you about their "cut" diet, cycling, periodization, etc. Some of them (eg Ben Pakulski) work with scientists in fact, and go to ridiculous lengths in that regard. Except body builders drop carbs significantly and they always eat a ton of protein, cut or bulk. Of course steroids help to achieve and sustain single digit body fat percentages, but even without steroids you should see OK results if you're willing to put in the work in the gym.
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Just ask any competitive bodybuilder how to lose fat without losing much muscle and they will tell you about their "cut" diet, cycling, periodization, etc. Some of them (eg Ben Pakulski) work with scientists in fact, and go to ridiculous lengths in that regard. Except body builders drop carbs significantly and they always eat a ton of protein, cut or bulk. Of course steroids help to achieve and sustain single digit body fat percentages, but even without steroids you should see OK results if you're willing to put in the work in the gym.