Weight Gainers
Shop weight gainers and mass gainers combining protein, carbohydrates and calories in convenient shakes. Ideal when you’re looking for an easier way to increase your daily calorie and protein intake while supporting muscle growth and maintenance.
Showing all 3 resultsSorted by popularity
-
Applied Nutrition – Critical Mass Original 6kg
Original price was: £54.95.£39.95Current price is: £39.95.Select options This product has multiple variants. The options may be chosen on the product page6 Flavours Available
-
DY Nutrition – Metabolic Mass 6kg
Original price was: £59.99.£54.95Current price is: £54.95.Select options This product has multiple variants. The options may be chosen on the product page5 Flavours Available
-
Optimum Nutrition – Serious Mass 2.73kg
Original price was: £45.00.£39.95Current price is: £39.95.Select options This product has multiple variants. The options may be chosen on the product page6 Flavours Available
Make it easier to increase your calorie intake
Weight gainers are high-calorie shakes designed for people who find it difficult to eat enough through normal meals alone. They typically combine protein with a much larger amount of carbohydrate than a standard protein shake, making it easier to add a substantial number of calories without preparing another full meal.
They're especially popular during muscle-gain phases, with people who have a naturally smaller appetite, or anyone whose training and lifestyle make eating enough consistently more difficult. Protein contributes to the growth and maintenance of muscle mass, while the higher calorie content helps make a calorie surplus easier to achieve.
Is a weight gainer right for you?
If you struggle to eat enough
This is where weight gainers make the most sense. Drinking calories can be easier than sitting down to another large meal, so a shake can help make a higher daily intake more manageable.
If you're trying to gain weight
Body weight increases when you consistently consume more energy than you use. A weight gainer can make that calorie surplus easier to reach, but it still works as part of your overall diet rather than causing weight gain on its own.
If muscle gain is the goal
Weight gainers provide both calories and protein, with protein contributing to the growth and maintenance of muscle mass. They can be particularly convenient when you're combining a calorie surplus with regular resistance training.
If a normal protein shake isn't enough
Standard whey is mainly about protein. A weight gainer usually adds much more carbohydrate and calories, making it better suited to people who need to increase total energy intake as well as protein.
If you want something easy after training
A weight gainer can be a convenient option after a session when you want protein and a larger amount of carbohydrate in one drink. It doesn't have to replace your next proper meal.
If convenience matters
Large portions of food can take time to prepare and eat. A shake can be easier to fit around work, training, commuting or a busy day when keeping calories high is otherwise difficult.
How to choose a weight gainer
Start with calories per serving
Weight gainers vary massively in calorie content. Some provide a modest step up from a protein shake, while others deliver a very large serving. Choose based on how many extra calories you actually need rather than automatically going for the biggest number.
Look at the protein
Protein content matters too. Compare how much protein the serving provides alongside the total calories so you can see whether the formula matches what you're looking for.
Don't ignore the carbohydrate
Carbohydrate is where much of the extra energy in a weight gainer usually comes from. Different formulas use different amounts and sources, so the carbohydrate content can vary significantly between products.
Check the real serving size
A “serving” can be several large scoops. If the recommended portion is bigger than you realistically want to drink at once, you may prefer a different formula or use a smaller portion as part of your routine.
Water or milk?
Mixing with water keeps the shake closer to the nutrition shown for the powder alone. Milk makes it creamier and can add substantially more calories and protein, which may be useful if gaining weight is the goal.
Work out the cost per shake
Weight gainer bags can look huge, but the serving sizes are often huge too. Compare the number of full servings rather than pack weight alone to understand how long the product will actually last.
Related categories
Weight gainer questions
What is a weight gainer?
A weight gainer is a high-calorie powdered shake that typically combines protein with a large amount of carbohydrate. It's designed to make increasing your calorie and protein intake more convenient.
Do weight gainers actually help you gain weight?
They can help make a calorie surplus easier to achieve because they provide a large number of calories in a convenient drink. Actual weight gain still depends on consistently consuming more energy than your body uses.
What's the difference between a weight gainer and protein powder?
Standard protein powder is mainly used to increase protein intake. Weight gainers provide protein too, but they usually contain far more carbohydrate and total calories, making them better suited to people trying to increase overall energy intake.
Are weight gainers good for building muscle?
They can fit into a muscle-gain diet because they provide calories and protein, and protein contributes to the growth and maintenance of muscle mass. Resistance training and your overall diet still matter.
When should I take a weight gainer?
Whenever it helps you reach your daily calorie and protein intake. Between meals and after training are both popular choices, but there isn't one compulsory time of day.
Can I take a weight gainer every day?
It can be used regularly if it fits your overall nutrition plan and the product directions. The important thing is whether the calories and nutrients make sense alongside the rest of what you're eating.
Should I mix weight gainer with milk or water?
Either works. Water keeps the finished shake lower in calories, while milk makes it creamier and adds extra calories and protein. If gaining weight is difficult, milk can be an easy way to make the shake even more calorie-dense.
How many calories are in a weight gainer?
There isn't a standard amount. Some formulas provide a few hundred calories while others provide considerably more in a full serving. Check the serving size carefully because it can differ hugely between products.
Can I use a weight gainer if I have a small appetite?
That's one of the main reasons people choose them. Liquid calories can be easier to consume than adding another large meal, so a weight gainer can provide a more manageable way to increase daily intake.
Will a weight gainer make me fat?
A weight gainer adds calories, and consuming more calories than you need can lead to body-fat gain as well as overall weight gain. The aim is usually to use it as part of a controlled calorie surplus rather than simply adding as many calories as possible.