Know your numbers before you buy
BMI, calorie, macro and body-fat calculators — find your daily protein target in under a minute.
How to choose a gainer
A gainer is a shake that adds calories as well as protein, mostly from carbohydrates. Gainers suit people who find it hard to eat enough to reach their calorie target. The ratio of protein to carbohydrate is the main difference between types.
| Type | Calories per serving | Protein share |
|---|---|---|
| Mass gainer | Highest, often 500 kcal or more | Lower, mostly carbohydrates |
| Weight gainer | Moderate | Lower to moderate |
| High-protein gainer | Moderate | Higher, closer to a protein shake |
What to check on the label
- Calories, protein and carbohydrate per serving, and the serving size in grams.
- Added sugar, if you are watching it.
- Servings per pack: large servings mean a 3 kg tub runs out faster than it looks.
If you need protein without the extra calories, see the protein guide.
Gainers: questions
What is the difference between a mass gainer and whey protein?
Whey is mostly protein. A gainer adds a large amount of carbohydrate, so it has many more calories per serving.
Can I take a half serving of a gainer?
Yes. Many people start with a smaller serving and adjust it to their calorie target.
Do I need a gainer to put on weight?
No. A gainer is a convenient way to add calories, but regular food can do the same job.

