Challenger Nutrition Thunder Gain is a high-calorie mass gainer, typically providing 1,250 calories and 50g of protein per 334g serving to support weight gain. A 5 lb (2.27 kg) container generally offers around 6.5 to 7 servings. It includes whey protein concentrate, carbohydrates, and is designed to be easily digested.Serving Info: Each serving is 334 grams, with 1,250 calories.Servings Per Container: A 5 lb (2.267 kg) container has about 6.5-7 servings.Key Ingredients: Pure whey protein concentrate, carbohydrates, and nutrients.Recommendation: Often used in 2 servings daily for maximum results.