Optimum Nutrition Serious Mass - 5.4kg

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Optimum Nutrition’s Serious Mass is the ultimate weight gain formula to help you develop the physique you've always wanted! Each delicious shake delivers an incredible 1,250 calories, but no added sugar. This includes 50g of blended protein to support muscle growth and 250g of carbohydrates to support the growth of lean muscle mass.

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Optimum Nutrition’s Serious Mass is the ultimate weight gain formula. If you find it difficult to gain weight, Serious Mass will help you develop the physique you've always wanted!

  • The ULTIMATE weight gain formula.
  • Add serious mass with 1,250 quality calories per shake.
  • Support muscle growth with 50 g of proteins and 250 g of carbs per serving.
  • Enjoy between meals, post-workout &/or before bed.

What Does It Do?
Each delicious shake delivers an incredible 1,250 calories, but no added sugar. This includes 50 g of blended protein to support muscle growth and 250 g of carbohydrates. Supports growth of lean muscle mass.

When Is The Best Time To Enjoy My Shake?
Simply mix up 2 scoops with milk or water in your Optimum Nutrition shaker and enjoy between meals, post-workout and/or before bed.

Suitable for vegetarians.

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Regular price
£69.99
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from £43.99
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