hello . i have a question about my daily calorie intake. i have a high metabolism and have tried to gain weight by eating 2,000+ calories per day but this hasnt worked.i have stayed around the same weight since i was in high school..10 pounds more or less but never any more than that, no matter what. i have no health concerns that would prevent me from increasing my calorie intake to gain weight but im unsure how many more calories i should shoot for. im 37,5'7" and about 50 pounds under my ideal weight for my height. im in good shape with a thin build. not muscular but that's what im hoping to gain - not just weight but muscle mass, and i would like to know how to do this safely. thanks for your input.