Weight Gainers
Shop our range of weight gain supplements, featuring shakes, foods, spreads, and bars designed to support your bulking up ambitions.
Shop Mass Gainers at Myprotein
Mass gainers are high-calorie powders built for one job: giving you the calorie and protein surplus you need to add size. Each serving packs a serious combination of protein and carbohydrates into a convenient shake format — the kind of intake that's genuinely difficult to hit through food alone when you're training hard and need to eat big.
The range includes everything from traditional weight gainer powders to lighter, refreshing formats for those who struggle with heavy shakes. Whether you're after something to go alongside your morning meals or a substantial shake to fill in the gaps, there's a format here built around how you actually eat and train.
Who Mass Gainers Are For
Mass gainers are built for people who genuinely struggle to eat enough. If you're naturally lean, have a fast metabolism, or find it hard to get enough calories in around a busy schedule, these powders close the gap between what you're eating and what you actually need. They're particularly popular with people in the middle of a serious bulk, where consistent calorie intake day after day is the real challenge.
Hardgainers, those new to training, and experienced lifters hitting a plateau all reach for weight gainers for the same reason — food volume becomes a limiting factor before the training does. A well-timed mass gainer removes that ceiling. Protein contributes to the growth and maintenance of muscle mass1, so hitting your daily totals consistently is what actually moves the needle.
When to Use Mass Gainers
Post-training is the most common time to take a mass gainer — you've just finished a session, you need calories and protein, and a shake is faster and easier than cooking. Many people also use them as a mid-morning or mid-afternoon top-up when meals are spaced far apart and calorie targets are hard to hit through solid food alone.
Timing matters less than consistency. Whether you take it first thing in the morning, between meals, or after training, what counts is hitting your daily calorie and protein targets across the week. Mass gainers work best when they're slotted into your routine in a way that genuinely adds to your intake — not replaces food you'd have eaten anyway.
Mass Gainer Benefits
Serious Calorie Density in One Shake
Getting enough calories when you're trying to build size is harder than most people expect. Mass gainers pack a high volume of protein and carbohydrates into a single serving — the kind of calorie count that would take multiple meals to replicate from whole food alone. It's an efficient way to hit a surplus without spending hours in the kitchen.
High Protein for Muscle Mass
Every mass gainer in the range delivers a substantial protein hit per serving. Protein contributes to the growth and maintenance of muscle mass1, and hitting consistent daily totals is what makes the difference during a bulk. A shake delivering 30g+ of protein alongside your carbs makes that easier to achieve across the week.
Carbohydrates to Fuel Your Training
The carbohydrate content in mass gainers does more than pad out the calories. Carbohydrates are the body's primary fuel source during high-intensity training, and 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. Having that carbohydrate load in your shake means your fuelling is sorted alongside your protein.
Formats to Suit Different Appetites
Not everyone wants a thick, heavy shake — especially first thing in the morning or if your appetite is naturally on the lower side. The range includes traditional creamy gainer formats alongside lighter, refreshing options, so you can get the calories in a format that actually works for you rather than one you have to force down.
Popular Picks
Impact Whey Mass Gainer — If you're serious about adding size, Impact Whey Mass Gainer packs 388 calories, 30g of protein, and 50g of carbs into every serving.
Clear Whey Mass Gainer — Unlike traditional mass gainers, Clear Whey Mass Gainer delivers 35g of protein and 60g of carbs in a light, refreshing format that doesn't feel like a meal in itself.
Origin Cream of Rice — Origin Cream of Rice is a vegan-friendly breakfast built around 39g of complex carbs per serving, making it a straightforward morning option for those fuelling hard training days.
FAQs
What is a mass gainer?
A mass gainer is a high-calorie supplement powder designed to help people increase their overall calorie and protein intake. Each serving combines a large dose of protein with a significant amount of carbohydrates, making it easier to hit a daily calorie surplus through a convenient shake. They're formulated specifically for people who want to add size and find it difficult to consume enough calories through food alone.
What's the difference between a mass gainer and a weight gainer?
Mass gainers and weight gainers refer to the same category of supplement — high-calorie, high-protein powders designed to help people increase their daily calorie intake. The terms are used interchangeably across the industry. What varies is the specific ratio of protein to carbohydrates, the total calorie count per serving, and the format — some are thick and creamy, others are lighter and more refreshing.
How many calories are in a mass gainer serving?
Calorie content varies by product and serving size, but mass gainers are built to deliver a meaningful calorie surplus in a single shake. Impact Whey Mass Gainer provides 30g of protein and 50g of carbohydrates per serving, while Clear Whey Mass Gainer — a lighter, refreshing alternative — delivers 60g of carbohydrates per serving. Always check the nutritional panel for exact figures, as serving sizes differ across the range.
Which mass gainer should I choose?
The right mass gainer depends on how you prefer to take your calories. If you want a traditional, substantial shake with solid protein and carbohydrate numbers, Impact Whey Mass Gainer is a strong starting point — 30g of protein and 50g of carbs per serving. If heavy shakes aren't for you, Clear Whey Mass Gainer offers a light, refreshing format with 60g of carbs, so you can hit your targets without the thick texture.
Can I use a mass gainer as a meal replacement?
Mass gainers are designed to supplement your existing food intake, not replace whole meals. They work best when used to fill calorie gaps — between meals, post-training, or first thing in the morning alongside breakfast. Relying on them as a full meal replacement means missing out on the fibre, micronutrients, and food variety that whole meals provide.
How much protein do mass gainers contain?
Protein content varies across the range, but mass gainers are built to deliver a substantial amount per serving. Protein contributes to the growth and maintenance of muscle mass1, so the protein dose in each serving is central to what makes a gainer effective, not just the calorie count. Check individual product pages for exact per-serving figures.
Are there different formats of mass gainers available?
The range covers multiple formats to suit different preferences. Traditional mass gainer powders mix into thick, creamy shakes — ideal if you want maximum calorie density. For those who prefer something lighter, Clear Whey Mass Gainer delivers in a refreshing, juice-style format. Origin Cream of Rice is also available as a versatile breakfast option providing 39g of complex carbs per serving, useful for building carbohydrate intake across the day.
Who developed the mass gainers at Myprotein?
Myprotein's expert nutritionists developed the weight gainer range, formulating each product around the specific needs of people looking to increase their calorie and protein intake. Every product is built with clear nutritional targets in mind — protein content, carbohydrate ratios, and overall calorie density — rather than simply maximising serving size.
When is the best time to take a mass gainer?
Post-training is the most popular time to take a mass gainer, as it's when many people are ready to eat and need a quick, high-calorie option. They're equally effective as a between-meal top-up when you've got a gap in your eating schedule and need to close the distance to your daily calorie target. Consistency across the day matters more than any specific timing window.
Can mass gainers be used alongside other supplements?
Mass gainers sit comfortably alongside other supplements in a training stack. Many people combine them with creatine — creatine increases physical performance in successive bursts of short-term, high intensity exercise3 — or use them alongside EAA formulas. The gainer covers calorie and protein targets, while other supplements address specific performance or recovery goals separately.
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.
3. Creatine increases physical performance in successive bursts of short-term, high intensity exercise.