Serious Mass is the ultimate gainer from Optimum Nutrition. With its low-fat, high-carbohydrate composition, this Hard Gainer enables you to gain weight quickly by snacking between meals and after your workout. Serious Mass Gainer provides over 1,250 calories a day, with over 250g of high-quality carbohydrates, over 50g of protein to build muscle mass, just 2g of processed fatty acids and a significant portion of vitamins and minerals. The complex sugars in the best gainer provide you with the calories you need to be in caloric surplus. This calorie surplus is essential in the mass gain phase, as only 21g of the 250g contained in Serious Mass comes from fast sugars. The protein content of the gainer is essential for muscle gain, enabling you to build a strong, massive physique. The protein in Serious Mass is a blend of whey, casein and egg albumin, making it an excellent source of protein. Too thin, too skinny? It's not always easy to gain weight, but Serious Mass helps you do just that. Easy to consume and rich in calories, this hard gainer has everything you need for ectomorphs (thin people). To gain weight naturally, you need to eat a lot and often throughout the day. By taking Serious Mass at a rate of 50g to 100g per dose, 2 or 3 times a day in addition to meals, you'll get more total calories. This is necessary to kick-start the weight-gain process.