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Mass Gainers
Optimum Nutrition
Serious Mass Gainer
£69.99High-Calorie Mass Gainer
(2 reviews)
Premium weight gainer with 1250 calories and 50g protein per serving, plus 25 essential vitamins & minerals.
Key Benefits
- 1250 calories
- 50g protein
- Creatine + glutamine
- 25 vitamins & minerals
Usage Instructions
2 scoops with 700ml whole milk, 1–2× daily.
Why It Works
Built To Perform
1250 calories
50g protein
Creatine + glutamine
25 vitamins & minerals
Customer Reviews
What People Say
"Gained 5kg in the first month. Monster product."
Harry P.
"Great for hardgainers like me."
Dev S.