Optimum Nutrition Serious Mass 12lb

If you're ready to get serious about packing on big-time muscle, then you need Serious Mass Weight Gainer.

What is Serious Mass?

ON Serious Mass is a well-rounded weight gaining formula with a whopping 1,250 calories per serving. But it's not just a calorie bomb -- there's also 50 grams of protein, creatine, glutamine, zero added sugar, and much more.

ON Serious Mass features:

• Loaded with calories at 1,250 per serving
• 50g blend of whey and casein protein
• 25g vitamin and mineral complex
• Creatine & Glutamine for extra strength and recovery
• No added sugar!

Directions

Use ON Serious Mass to pack on the muscle mass you've always desired. Mix two scoops with 700mL of water, or for a thicker consistency, use milk instead. Take one full serving per day.

Nutrition Information

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