To increase muscle gain for competitive bodybuilding which needs a very high quantity of protein which is not possible via regular, albeit healthy, meals. A bodybuilding cut can be one of the most rewarding and challenging experiences you could ever do. It truly becomes a lifestyle diet which requires extreme dedication. You get to see all your hard work in the gym come out on display for all to see. The most important thing is to set up a calorie deficit and get enough protein in your diet.