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Serious Mass by Optimum Nutrition

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Current Price $99.95
Original Price $129.95
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Optimum Nutrition Serious Mass – High-Protein Mass Gainer

Optimum Nutrition Serious Mass is one of the top selling weight gainers currently on the market - Optimum Nutrition Serious Mass is serious weight gaining supplement giving you huge calories per serve. Optimum Nutrition Serious Mass can be used for a variety of reasons - great for those who struggle to consume their daily calorie intake, to those who needs to put on some muscle mass and size. Optimum Nutrition Serious Mass is the perfect supplement to achieve some serious mass gaining results!

Each serve of Optimum Nutrition Serious Mass delivers:

  • A whopping 1,250 calories per serving with water & approximately 1,550 calories when added to low fat milk.

  • 50g of whey protein per serve.

  • 256g of carbohydrates to support muscle fuel and aid in muscle recovery after workouts. This works by replenishing glycogen stores lost during exercise.

  • Added creatine, L-glutamine and glutamine peptides to assist in muscle strength and reduce delayed onset muscle soreness (DOM’s).

  • 25 added vitamins and minerals.

Maltodextrin is the sole source of carbohydrate in this weight gaining supplement, with a total of 256g of maltodextrin present per scoop. Maltodextrin is made from starch and is normally used in heavy weight gainers, as it is has both fast-digesting and fast-releasing. Replenish your glycogen stores fast with maltodextrin, and help up your carbohydrate intake easily! Optimum Nutrition Serious Mass has a whopping 50g of protein per serve, which equates to approximately a 185g serve of chicken! Boost your muscle protein synthesis, muscle size and mass, and muscle recovery with this huge hit of protein in Optimum Nutrition Serious Mass.

If you want to supercharge your Optimum Nutrition Serious Mass weight gaining shake, we suggest adding the following ingredients to help increase your calories.

  • Rolled oats - complex carbohydrates.

  • Oat bran or psyllium husk - great source of dietary fibre.

  • Banana or fruit, such as berries - source of vitamins, minerals and fibre.

  • Flaxseed oil - supercharged with good fats.

  • Peanut or nut butter - good fats, and who doesn't love peanut butter?!

  • Honey - delicious natural sweetener.

  • Milk - easy way to boost calories and a great source of bone-building calcium.

Optimum Nutrition Serious Mass is available in two sizes (6lb tub and 12lb bag) with 5 flavours to choose from. Get SERIOUS about your mass gaining today, with Optimum Nutrition Serious Mass!


(Based on 12lb Chocolate flavour)

  • Consume 1 scoop (25g) or 2 scoops (50g) of with approximately 475ml-500ml of chilled water or milk. Shake until completely dissolved and consume immediately.
  • Due to this being a weight gaining supplement ensure there is adequate space in the shaker cup to allow the powder to dissolve properly when shaken.
  • If 2 scoops is too large of a serving, consume 1 scoop, twice a day.

Always read the label. Follow directions of use. Please read the label to decide whether this product is right for you.

Consult with your relevant healthcare professional before taking supplements or vitamins, especially if you are currently taking medication. If symptoms transpire and persist, seek immediate advice from your relevant healthcare professional.

If pregnant, planning pregnancy, or breastfeeding, consult with your healthcare professional before using any health foods, functional foods, supplements or vitamins.

Supplements and vitamins should not be used by persons under the age of 16, unless the product is specifically designed for children or otherwise advised on by your healthcare professional.

Supplements, vitamins and minerals should never replace a balanced and varied diet.

Keep all supplements and vitamins out of reach of children. Always follow advised storage conditions and consumption instructions.

Do not exceed recommended daily dosage. Do not consume products if seals are broken or damaged. Do not consume products if best before or expiry dates have exceeded.