I searched the body build thread but couldn’t find an exact answer to my question. In terms of muscle growth and development how are calories related? I thought calories are what your body uses for energy and burns them when doing any work. When not enough calories are present in the body, your body will burn stored fat. Obviously more calories going out than into the body will result in fat loss. However will not enough calories result in the body burning muscle as well? I am not taking any significant amount of calories but I am eating close to my weight in protein, and I am taking a multi vitamin and eating healthy lots of veggies. I am 5'11 and weigh 205 pounds, I have been working out for about 5 months and do see a vast improvement. I am focusing on losing excess weight hence I am not bothering with calories as much. But if I am hurting my muscle development I would gladly increase my caloric intake.