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Serious Mass is for intense muscle building and weight gains - 1,250 calories, 50g of protein, and about 250 carbs that help fuel your training. Unlock your power with 3g creatine monohydrate and 25 vitamins & essential minerals, plus size up your goals and get serious about your gains 💪 #SeriousMass #UnlockMoreYou #OptimumNutrition #ONSupplements

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