To be specific, Serious Mass contains 1,250 calories per serving, and the powder is instantized to make it … Flavour: Vanilla Serving Size: 2 Heaping Scoops (334g) Servings per Container: 16 : Amount per Serving % RI per Serving : Energy: 5248kJ / 1261 kcal : 63 %* Fat: 4.4 g: 6 %* of which saturates : 1.3 g: 7 %* Carbohydrate: : Calorie breakdown: 3% fat, 81% carbs, 16% protein. However, Serious Mass gainer side effects shouldn't be ignored. Maltodextrin is considered a high glycemic index carbohydrate. Because with optimum nutrition serious mass side effects don’t come along but a tub ice cream does. There are 375 calories in 100 g of Optimum Nutrition Serious Mass. Optimum Nutrition Serious Mass Side Effects | Livestrong.com There are 1250 calories in 2 scoops (334 g) of Optimum Nutrition Serious Mass. Optimum Nutrition Serious Mass (2,73 kg) Weight Gainers, Weight gainers for beginners Customer reviews and online shopping at ShopBuilder Webstore. Before coming over to the Optimum Nutrition Serious Mass review, let’s take an overview of this product. Nutrition Facts. Optimum’s weight gainer Serious Mass boasts a massive 1250 calories per serving! There are 1250 calories in a 2 scoops serving of Optimum Nutrition Serious Mass. There are 625 calories in 1 serving of Optimum Nutrition Serious Mass. Optimum Nutrition Serious Mass is a premium mass gainer for the hard gainer wanting rapid results. From faster muscle growth and repair to greater energy, Serious Mass results are quite impressive. Serious Mass Nutrition Facts. : Calorie Breakdown: 3% fat, 81% carbs, 16% prot. : Calorie breakdown: 3% fat, 81% carbs, 16% protein. Optimum Nutrition Serious Mass delivers a whopping 254 grams of carbohydrates per serve, 21 grams of which are sugars. This carbohydrate content is delivered from maltodextrin and some naturally occurring lactose from the protein powders. Get full nutrition facts for other Optimum Nutrition products and all your other favorite brands. Now if it were 1250 calories of pure junk, you’d be better off eating a tub of ice cream instead…but PLEASE don’t do that! Product Overview – Serious Mass Nutrition Facts.