me gain any weight? I'm a 22 year old male thats struggling to gain any weight. I'm 6'3 and weighing only 152 pounds, so I'm underweight and want to put a few pounds on. I ate a peanut butter sandwich on whole wheat bread and a Boost Plus drink, worth around 600 calories with around 30g fat and 70-75g of carbs. Will this help me gain any weight at all?