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🚚 We offer a 3 Serve Return guarantee! You have 30 days to try up to 3 serves, if you don't like the flavour or performance you can return it.
Mix 334g (approximately 2 heaping scoops) with 710ml of cold water or milk in a blender for 30 to 45 seconds. New users should begin with half a serving for the first week. Take 1 to 2 serves per day in addition to regular meals. Do not use as a meal replacement.
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Multiple benefits in a single scoop - complements every stack.
Optimum Nutrition's Serious Mass is the ultimate weight gain formula. With 1,250 calories per serving and 50 grams of protein for muscle recovery, this instantised powder makes for a sizeable post-workout and between-meals shake. Optimum Nutrition's Serious Mass’ protein blend provides easy-to-digest protein, boosting your muscle protein synthesis and providing quick absorbable protein for better recovery and bigger gains after an intense workout session. Make sure to follow the directions of use at the back of the tub to enjoy the best effects.
334g (approx. 2 heaping scoops)
2.72kg = 8 serves · 5.44kg = 16 serves
| Nutrient | Per Serve (334g) |
|---|---|
| Energy | up to 1,243 Cal (5,272kJ) |
| Protein | 50g |
| Carbohydrates | up to 254g |
| Fat | approx. 3 to 4g |
| Creatine | 3g |
| Total Sugars | 20g |
| Sodium | 464mg |
| Potassium | 1062mg |
| Calcium | 571mg |
| Vitamins and Minerals | 24 included |
Chocolate
A rich, classic chocolate profile. Deep and satisfying. The most popular Serious Mass flavour globally.
Vanilla
A smooth, sweet vanilla. Versatile and easy to drink across multiple serves per day. Works well blended with banana or nut butter for additional calorie density.
Serious Mass uses Whey Protein Concentrate, Calcium Caseinate, and Whey Powder. Combining fast-digesting whey with slow-digesting caseinate ensures a sustained, multi-stage release of amino acids to support muscle recovery over time.
A full 2-scoop serving provides 1,243 calories when mixed with cold water. When mixed with 710ml of milk, the total calorie count increases significantly. New users should start with a 1-scoop half serving.
Yes. Each full 2-scoop serving includes 3 grams of creatine. Account for this 3g amount if you are already taking a standalone creatine supplement.
No. Serious Mass is designed to be used in addition to a healthy, balanced diet, not in place of regular meals.
Serious Mass
$169.95
Prep time: 2 minutes | Servings: 1
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