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 carbohydrates, and 25 vitamins & minerals with added glutamine and creatine into every serving. It's time to stop thinking small.

Optimum Nutrition 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 carbohydrates to support fueling of intense workouts and aid in the replenishment of glycogen stores - with no sugar added.
• Enhanced with creatine, L-glutamine & L-glutamine peptides, choline, inositol, PABA, and MCTs.
• 25 Vitamins & essential minerals with an emphasis on B-vitamins and antioxidants.

Bulk Up Fast – SizeOn Max Performancefor unparalleled increases in athletic performance, skeletal muscle recovery, explosiveness and most notably, immediate increases in muscle size WHILE YOU ARE STILL TRAINING.

Great Tasting Protein Bar - Elite Gourmet 6-Layer Protein Bar is not only packed with up to 32g of Protein, including Advanced Hydrolyzed Whey Protein Isolate, it's also the best tasting bar you can buy.