Sports and energy
Mass gainer
Also called: weight gainer
High-calorie powders of protein and carbohydrate.
- Why people take it
- Weight gain.
- What the evidence says
- Works by adding calories.
- How it is usually taken
- One serving after training or between meals; many contain 500 to 1,200 calories.
- Be careful
- Often very high in sugar.
- Medicines it can interact with
- No important medicine interactions are known, but tell your doctor and pharmacist about every supplement you take.
Other sports and energy
Common questions
What is Mass gainer?
High-calorie powders of protein and carbohydrate.
Why do people take Mass gainer?
Weight gain.
Does Mass gainer work?
Works by adding calories.
How much Mass gainer do people take?
One serving after training or between meals; many contain 500 to 1,200 calories.
Is Mass gainer safe?
Often very high in sugar.
Does Mass gainer interact with medicines?
No important medicine interactions are known, but tell your doctor and pharmacist about every supplement you take.
Sources and further reading
Last reviewed 31 October 2026. Written by Satya Babu.
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