Weight Gainers
Whether you’re trying to increase strength and size, or struggling to gain weight, the most important thing is creating a calorie surplus — taking on more calories than you burn.
We know this can be difficult when you’re leading an active lifestyle, so having one of our range of weight-gain shakes on hand makes it easier to get the fuel you need, wherever you are.
Shop our range of weight gain supplements, featuring shakes, foods, spreads, and bars designed to support your bulking up ambitions.
Shop Weight Gainers at Myprotein
Mass gainers are high-calorie supplements designed to deliver a concentrated hit of protein and carbohydrates in a single serving. When whole food alone isn't cutting it — whether that's because appetite is low, schedules are packed, or calorie targets are simply hard to hit — a weight gainer powder fills the gap efficiently. Protein contributes to the growth and maintenance of muscle mass1, while carbohydrates contribute to the recovery of normal muscle function after highly intensive exercise leading to muscle fatigue and the depletion of glycogen stores in skeletal muscle2.
The range here covers different formats and macro ratios, so whether the goal is lean size or maximising overall intake, there's a mass gainer supplement to fit that approach. Every product is developed to Myprotein's exacting quality standards, making them a reliable part of any serious training diet.
Who Weight Gainers Are For
Mass gainers are built for people who genuinely struggle to consume enough calories through food alone. That includes hard gainers — those with fast metabolisms who find it difficult to create a caloric surplus — as well as athletes in heavy training blocks where energy demands are high and appetite can lag behind output.
Weight gainer supplements are equally useful for anyone with a demanding schedule who can't always sit down to a full high-calorie meal. A single weight gainer shake can deliver a significant portion of the additional calories needed on training days, making them a practical tool rather than a shortcut.
When to Use Weight Gainers
Timing depends on individual goals and daily routine. Many people use a mass gainer shake post-training, when the body needs both protein and carbohydrates — protein contributes to muscle mass growth1 and carbohydrates contribute to glycogen replenishment after intense exercise2. Others prefer it between meals or first thing in the morning to hit calorie targets earlier in the day.
The most important factor isn't the exact timing — it's consistency. Hitting a caloric surplus day after day is what drives weight gain over time. A weight gainer powder used at the same point in the daily routine becomes a reliable habit rather than an afterthought.
Weight Gainers Benefits
High Calorie Density in One Serving
A weight gainer shake packs a substantial number of calories into a convenient format. For people chasing a caloric surplus, this is far more practical than preparing and eating additional full meals throughout the day.
Protein to Support Muscle Mass
Mass gainers deliver meaningful amounts of protein per serving. Protein contributes to the growth and maintenance of muscle mass1, making it a core component of any plan focused on building size alongside a structured training programme.
Carbohydrates for Glycogen Replenishment
The high carbohydrate content in weight gainer supplements plays an important role after demanding sessions. Carbohydrates contribute to the recovery of normal muscle function after highly intensive and/or long-lasting physical exercise leading to muscle fatigue and the depletion of glycogen stores in skeletal muscle2.
Flexible Formats to Fit Any Routine
From ready-to-mix powders to high-protein food formats, the range covers different use cases. That variety means it's straightforward to work a mass gainer into a routine that actually suits how someone eats and trains.
Popular Picks
Impact Whey Mass Gainer — If you're serious about packing in the calories, Impact Whey Mass Gainer delivers 388 calories, 50g of carbs, and 30g of protein in a single serving.
Protein Pancake Mix — Protein Pancake Mix turns breakfast into a 34g-protein meal using a blend of fast- and slow-digesting protein, and it's on the plate in minutes.
FAQs
What is a mass gainer?
A mass gainer is a high-calorie supplement that combines protein and carbohydrates in a single serving to help people increase their overall daily calorie intake. Unlike standard protein powders, mass gainers are formulated to deliver a large macro payload — typically 30g or more of protein alongside a substantial carbohydrate load — making them a practical tool for anyone struggling to hit a caloric surplus through food alone.
What's the difference between a mass gainer and a weight gainer?
Mass gainer and weight gainer are terms used interchangeably and refer to the same category of supplement. Both describe high-calorie powders built around protein and carbohydrates, designed to make it easier to consume the surplus calories needed to support size and strength goals. The naming differs by brand rather than by any meaningful difference in formulation.
How is a weight gainer different from a standard protein powder?
Standard protein powders are primarily focused on delivering protein with minimal carbohydrates and calories. Weight gainers include significantly more carbohydrates per serving, which pushes the total calorie count much higher. Impact Whey Mass Gainer, for example, provides 30g of protein and 50g of carbohydrates per serving — a profile built for caloric surplus, not just protein intake.
Which mass gainer should I choose?
Impact Whey Mass Gainer is a strong starting point — 30g of protein and 50g of carbohydrates per serving makes it a straightforward option for hitting a meaningful caloric surplus after training. If a more food-based format appeals, Protein Pancake Mix offers 34g of high-quality fast- and slow-digesting protein per serving in a form that fits easily into a breakfast or snack routine without feeling like a supplement.
When should I take a weight gainer supplement?
Post-training is a popular time to take a mass gainer, when the body needs both protein and carbohydrates after an intense session. That said, the most important factor is simply hitting total daily calorie targets — so using a weight gainer powder at whatever point in the day makes it easiest to stay consistent is the right approach for most people.
Can I use a mass gainer supplement if I'm not training every day?
Mass gainer supplements can be used on rest days as part of a plan to maintain a caloric surplus throughout the week. The total daily calorie and protein intake across all days matters more than whether a supplement is taken specifically around a session. Adjusting serving size on rest days is a sensible approach if overall intake needs to be slightly lower.
Are weight gainers suitable for beginners?
Weight gainers are suitable for beginners who are genuinely struggling to eat enough to support their training goals. They're not exclusively an advanced supplement — anyone who finds it difficult to reach a caloric surplus through whole food alone can benefit from adding a mass gainer shake to their daily routine, regardless of experience level.
Who developed these weight gainer products?
All weight gainer supplements in this range are developed by Myprotein's expert nutritionists. Every formulation goes through rigorous development to ensure the macro ratios, ingredient quality, and nutritional profiles are built to meet the real demands of people training seriously.
How many calories should a mass gainer provide?
There's no universal target — it depends on how large a surplus someone needs to hit. The calorie content of a weight gainer powder typically reflects its protein and carbohydrate content. A product like Impact Whey Mass Gainer with 30g protein and 50g carbohydrates per serving delivers a meaningful calorie contribution, but total intake always needs to be considered in the context of individual goals and overall diet.
Can I mix a weight gainer with milk instead of water?
Mixing a mass gainer with milk rather than water is a common way to increase the calorie and protein content of the shake further. Whole milk adds additional protein, carbohydrates, and fat, which pushes the total nutritional contribution of the serving higher — useful for those who need a particularly large caloric surplus.
1. Protein contributes to the growth and maintenance of muscle mass.
2. Carbohydrates contribute to the recovery of normal muscle function (contraction) after highly intensive and/or long-lasting physical exercise leading to muscle fatigue and the depletion of glycogen stores in skeletal muscle.