Putting on mass has never been so easy with Optimum Nutrition Serious Mass. This weight gainer powder contains a whopping 1,250 calories per serving, with 2 massive 167g scoops packing 50g of blended protein including Whey Concentrate and Isolates, as well as casein and egg proteins. Plus over 250g of carbohydrates, no added sugar, as well as creatine, glutamine and glutamic acid to support strength and recovery, look no further if you want to take your muscle building to the next level. Plus with as little as 7g of fat and enhanced with 25 vitamins and minerals, you can forget dirty bulking to increasing your calorie intake, and reach for a tub of Optimum Nutrition Serious Mass instead, to flood your body with muscle building nutrients capable of sky-rocketing your daily intake of proteins and carbohydrates. Available in Banana, Vanilla and Chocolate, prepare for one of the most delicious and best textured shakes on the market. Donβt forget to mix with low fat milk to step up your calorie game to the next level!
Putting on mass has never been so easy with Optimum Nutrition Serious Mass. This weight gainer powder contains a whopping 1,250 calories per serving, with 2 massive 167g scoops packing 50g of blended protein including Whey Concentrate and Isolates, as well as casein and egg proteins. Plus over 250g of carbohydrates, no added sugar, as well as creatine, glutamine and glutamic acid to support strength and recovery, look no further if you want to take your muscle building to the next level. Plus with as little as 7g of fat and enhanced with 25 vitamins and minerals, you can forget dirty bulking to increasing your calorie intake, and reach for a tub of Optimum Nutrition Serious Mass instead, to flood your body with muscle building nutrients capable of sky-rocketing your daily intake of proteins and carbohydrates. Available in Banana, Vanilla and Chocolate, prepare for one of the most delicious and best textured shakes on the market. Donβt forget to mix with low fat milk to step up your calorie game to the next level!
in 4 offers
last seen 9 May 2026
The lowest price we last saw for Optimum Nutrition Serious Mass Protein Powder High Calorie Weight Gainer, Chocolate Mint / 5.45kg (16 Shakes) was $120.07 at Carethy.au, compared across 4 retailers (last seen 9 May 2026). Prices may have changed since.
The all-time low we recorded was $106.94 on 21 Nov 2025.
Prices last updated 9 May 2026.
Optimum Nutrition Serious Mass Protein Powder High Calorie Weight Gainer, Chocolate Mint / 5.45kg (16 Shakes)
Putting on mass has never been so easy with Optimum Nutrition Serious Mass. This weight gainer powder contains a whopping 1,250 calories per serving, with 2 massive 167g scoops packing 50g of blended protein including Whey Concentrate and Isolates, as well as casein and egg proteins. Plus over 250g of carbohydrates, no added sugar, as well as creatine, glutamine and glutamic acid to support strength and recovery, look no further if you want to take your muscle building to the next level. Plus with as little as 7g of fat and enhanced with 25 vitamins and minerals, you can forget dirty bulking to increasing your calorie intake, and reach for a tub of Optimum Nutrition Serious Mass instead, to flood your body with muscle building nutrients capable of sky-rocketing your daily intake of proteins and carbohydrates. Available in Banana, Vanilla and Chocolate, prepare for one of the most delicious and best textured shakes on the market. Donβt forget to mix with low fat milk to step up your calorie game to the next level!
Putting on mass has never been so easy with Optimum Nutrition Serious Mass. This weight gainer powder contains a whopping 1,250 calories per serving, with 2 massive 167g scoops packing 50g of blended protein including Whey Concentrate and Isolates, as well as casein and egg proteins. Plus over 250g of carbohydrates, no added sugar, as well as creatine, glutamine and glutamic acid to support strength and recovery, look no further if you want to take your muscle building to the next level. Plus with as little as 7g of fat and enhanced with 25 vitamins and minerals, you can forget dirty bulking to increasing your calorie intake, and reach for a tub of Optimum Nutrition Serious Mass instead, to flood your body with muscle building nutrients capable of sky-rocketing your daily intake of proteins and carbohydrates. Available in Banana, Vanilla and Chocolate, prepare for one of the most delicious and best textured shakes on the market. Donβt forget to mix with low fat milk to step up your calorie game to the next level!
Last updated at 09/05/2026 12:59:45
Optimum Nutrition Serious Mass Chocolate 5450 g 5450 g
Delivery $150.99
Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Chocolate Mint Flavour, 16 Servings, 5.45KG
Delivery between 13β17 May $15.52
Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Chocolate Mint Flavour, 16 Servings, 5.45KG
Free delivery between 19β22 May
Optimum Nutrition Serious Mass Protein Powder with Creatine Glutamine 25 Vitamins and Minerals Chocolate Mint Flavour 16 Servings 5.45KG Chocolate
Delivery between 11β22 May $27.56
Optimum Nutrition Serious Mass Chocolate 5450 g 5450 g
Delivery $150.99
Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Chocolate Mint Flavour, 16 Servings, 5.45KG
Delivery between 13β17 May $15.52
Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Chocolate Mint Flavour, 16 Servings, 5.45KG
Free delivery between 19β22 May
Optimum Nutrition Serious Mass Protein Powder with Creatine Glutamine 25 Vitamins and Minerals Chocolate Mint Flavour 16 Servings 5.45KG Chocolate
Delivery between 11β22 May $27.56