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Engineered for hard gainers, Serious Mass delivers a hefty 50g of protein and 1,250 calories per serving to drive a surplus. The 2.72kg vanilla tub is Informed Sport certified, and each of its 8 large servings is calorie-dense by design.
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The brand behind this product — their story and what they stand for.
Optimum Nutrition's sizeable 16-product catalogue revolves around its Gold Standard 100% Whey and Isolate lines, offered in flavours from vanilla to chocolate peanut butter. Creatine, pre-workout, BCAAs and a mass gainer widen the range, and select products carry Informed Sport testing.
Understand which fitness goals this product is best suited for.
Muscle Gain
Supports muscle growth and recovery when combined with resistance training and a protein-rich diet.
A quick look at pricing, tier, and how it stacks up against the category average.
Step-by-step usage instructions so you get the most out of every serving.
Mix 1–2 scoops with 300–400ml of milk for a calorie-dense shake.
Consume between meals or post-workout to hit your caloric surplus.
Start with 1 scoop to assess tolerance before moving to the full serving.
Track your total daily calories. A mass gainer works best when it fills a genuine calorie gap — not as a meal replacement.
Common questions about this product — answered clearly and honestly.
Yes, this product is vegetarian-friendly. It does not contain any non-vegetarian ingredients.
Yes, this product has been lab tested by Informed Sport. Third-party lab testing verifies that the product contains what the label claims, giving you confidence in its quality and purity.
Each serving provides 50g of protein. This is a solid amount that supports muscle protein synthesis effectively.
This product is available in Vanilla. Flavour preferences are personal — chocolate and unflavoured tend to be the most versatile options.
The total pack weight is 2.72kg. With 8 servings, this should last approximately 8 days if you take 1 serving daily.
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