Weight Gain Supplement. Artificially flavored. No sugar added (not a sugar-free product). 1250 calories. 50 g protein. 250 g + carbs, 25 vitamins & minerals. The bigger picture of weight gainers. Serious weight gain requires serious calories. However, those who need the extra calories most, often have the toughest time consuming enough of them. For many aspiring to be bigger, highly-active metabolisms, weaker appetites, and on-the-run lifestyles make consuming sufficient calories through whole foods alone a real challenge