Optimum Nutrition Serious Mass Weight Gainer 12lbs

Optimum Nutrition
Free Gift

24  | 

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. With Serious Mass, you've got nothing to lose and lots to gain. We've consolidated over 1,250 calories, 50 grams of protein, 250-plus grams of carbohydrate, and 25 vitamins and minerals with added glutamine and creatine into every serving. It's time to stop thinking small; get serious-Serious Mass. 1,250 calories per serving in water; 1,630 calories when made with low fat milk. 50 grams of protein from a combination of faster and slower digesting sources including Whey, Casein, and Egg. 250-plus grams of carbohydrate to support fueling of intense workouts and aid in the replenishment of glycogen stores – with NO ADDED SUGAR. Enhanced with Creatine, L-Glutamine and Glutamine Peptide, Choline, Inositol, PABA, and MCTs. 25 Vitamins and Essential Minerals with an emphasis on B-Vitamins and Antioxidants.

Customers Who Bought This Item Also Bought

Customer Reviews

Based on 24 reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Customer Photos
Write a Review Ask a Question
  • Reviews (24)
  • Questions (0)

Thank you for submitting a review!

Your input is very much appreciated. Share them with your friends so they can enjoy it too!
Douglas M.
United States

Awesome product to use

Awesome product to use

Doug W.
United States

Using This For over 8 years

I've tried other weight gainers, this one tends to last me for about 4 hours. I like it, it works and taste fairly good. At least better than the other ones. Also the ingredients to include all of the vitamins are an extra bonus.

Optimum Nutrition Serious Mass Weight Gainer 12lbs
Mark C.
United States

Serious Mass

Has great flavor and mixes easy. No lumps or clumps. This product is the real deal for gains!


great product

great product, i have been looking for a product like this one for a long time, and just now i stop waising time and money. this product is great is high on proteins and calories but if u know how to transform those calories like i do, you wont have trouble. i have been able to get 10 pound in 2 weeks. but i work out and burn calories. good luck! dont change it


gained 17 pounds

i recommend this product to others but it does not taste good. however the effects are really good as i gained 17 pounds.

Customers Who Viewed This Item Also Viewed

Your Recently Viewed Items

Back to the top