Thunder Nutrition Challenger Gain, Chocolate, 5 LBChallenger Nutrition Thunder Gain, Chocolate, 5 LB, is designed for serious athletes and bodybuilders aiming to gain weight efficiently. Each 334gram serving provides 1,250 calories, making it a highcalorie option for those looking to increase their size. The product contains pure whey protein concentrate, delivering 50 grams of protein per serving. Essential nutrients such as calcium, iron, and potassium are also included to support overall health.