Weight Gainers

Shop Weight Gainers at Myprotein

If you're serious about adding size, a mass gainer is one of the most practical tools in your stack. Weight gainer supplements are calorie-dense formulas that pack a significant amount of carbohydrates and protein into a single shake — making it easier to hit the kind of calorie surplus that hard gainers and high-volume athletes often struggle to reach through food alone. Whether you're looking for a mass gainer powder to add to your morning routine or a weight gainer supplement to fuel recovery days, there's a formula here built for that goal.

Myprotein's range of weight gainers spans everything from straightforward, no-fuss options to more advanced formulas with higher calorie counts and added nutrients. Each product is formulated around real nutritional targets — not empty calories — so you're getting quality macros with every serving.

Who Weight Gainers Are For

Mass gainers are primarily built for people who find it genuinely difficult to consume enough calories through food alone. This includes hardgainers — those with fast metabolisms who struggle to maintain a calorie surplus — as well as athletes in strength and power sports who have significantly elevated daily energy requirements. If your training load is high and your appetite isn't keeping pace, a weight gainer powder can bridge that gap efficiently.

They're also a practical option for anyone going through a deliberate bulk phase who wants to track their macros without preparing multiple large meals a day. A well-formulated mass gainer gives you a measurable, consistent source of calories and protein in one shake, which makes logging and planning significantly easier.

When to Use Weight Gainers

Timing a mass gainer comes down to where you need the calories most in your day. Post-workout is a popular window — training depletes glycogen stores and creates demand for protein, and a weight gainer shake delivers both simultaneously. Protein contributes to the growth and maintenance of muscle mass¹, making a post-training shake a logical fit for those looking to add size.

For those who struggle to eat enough across the day, using a mass gainer as a between-meal shake or as part of breakfast is equally valid. The goal is consistent caloric surplus over time — when exactly you take it matters less than whether it's actually helping you hit your daily targets. Some people also use weight gainer powder before bed, particularly on high-volume training days when calorie needs are at their peak.

Weight Gainers Benefits

High-Calorie Nutrition in One Shake

Mass gainers deliver a concentrated source of calories, carbohydrates, and protein in a format that's far quicker to consume than preparing an equivalent whole-food meal. For anyone managing a demanding training schedule alongside work and daily life, that convenience is genuinely useful — not just a marketing angle.

Protein for Muscle Mass

Every weight gainer in this range contains a meaningful dose of protein. Protein contributes to a growth in muscle mass¹ and contributes to the maintenance of muscle mass², which means the protein content in each shake is doing real work alongside your training — not just padding out the nutritional label.

Carbohydrates to Fuel Your Training

The carbohydrate content in a mass gainer isn't filler — it's fuel. High-volume and high-intensity training demands substantial glycogen availability, and the carbs in a weight gainer supplement help replenish those stores and keep total calorie intake where it needs to be for size-building goals.

Flexible Formats to Fit Your Routine

Weight gainer powders are straightforward to customise. Mix with water for a lighter shake, blend with milk to increase the calorie count further, or add to oats and other whole foods for a high-calorie meal. The format lends itself to being dialled up or down depending on exactly where you are in your programme.

Popular Picks

After a clean carb source to stack with your gains? Origin Cream of Rice - a higher-calorie formula designed for serious bulking phases, combining whey protein with a large carbohydrate load to support the kind of consistent surplus that adding significant size requires.

FAQs

What is a mass gainer?

A mass gainer is a high-calorie supplement powder that combines protein, carbohydrates, and fats in a single serving. Unlike standard protein shakes, which are primarily focused on protein delivery, mass gainers are designed to contribute a significant amount of total calories — making it easier to reach and maintain a calorie surplus. They're typically mixed with water or milk and consumed as part of a structured nutrition plan.

What's the difference between a mass gainer and a weight gainer?

The terms are often used interchangeably, but there's a loose distinction worth knowing. Mass gainers typically contain a higher carbohydrate-to-protein ratio and a greater total calorie count per serving. Weight gainer supplements may sit at slightly lower calorie levels and offer more flexibility in how they fit into your daily intake. In practice, both serve the same core purpose — helping you hit a calorie surplus — and the right choice comes down to your specific daily calorie targets.

How many calories does a weight gainer powder typically contain?

This varies significantly between products. Entry-level weight gainer powders might deliver 400–600 calories per serving, while advanced mass gainer formulas can reach 1,000 calories or more per shake. The number you need depends on your total daily energy expenditure and how much of your calorie target you're meeting through food. If you're already eating three solid meals a day, a moderate-calorie option is often more practical than a maximum-calorie formula.

When should I take a mass gainer?

Post-workout is a common time, as training creates demand for both protein and carbohydrates. Many people also use mass gainers as between-meal shakes or as part of breakfast on high-training days. The priority is consistency — fitting your weight gainer supplement into the times of day where you consistently struggle to hit your calorie targets will have more impact than fixating on a precise timing window.

Can I mix a mass gainer with milk instead of water?

Yes — and it's a straightforward way to increase the calorie count of your shake without changing the formula itself. Whole milk adds additional protein, carbohydrates, and fats on top of the mass gainer's own nutritional profile, which can be useful if your calorie targets are particularly high. If you prefer a lighter shake or are keeping a closer eye on your macros, water is the simpler option.

How is a mass gainer different from a standard protein shake?

A standard protein shake is built primarily to deliver protein efficiently — typically 20–30g per serving with relatively modest calories overall. A mass gainer supplement is built around total caloric density, with protein as one component of a much larger carbohydrate and calorie load. If your main challenge is hitting a protein target, a protein shake usually covers it. If the challenge is hitting a calorie surplus, a mass gainer is the more appropriate tool.

Who developed the weight gainer products at Myprotein?

Myprotein's weight gainer range is developed by Myprotein's expert nutritionists. Each formula is built around clear nutritional targets — protein content, carbohydrate quality, and overall calorie density — rather than inflated serving sizes that obscure the actual nutritional value per gram.

Do Myprotein mass gainers contain quality protein sources?

Yes. The weight gainer formulas in this range use whey protein as their primary protein source — a complete protein that contains all essential amino acids. Protein contributes to the growth and maintenance of muscle mass¹, making the protein component of a mass gainer directly relevant to the size-building goals these products are designed to support.

How do I choose the right mass gainer for my goals?

Start with your daily calorie target and work out how much of that you're realistically hitting through food. From there, match the calorie content of your weight gainer supplement to the gap — if you're 500 calories short, a moderate-calorie formula works; if you're consistently 800–1,000 calories below target, a higher-calorie mass gainer makes more sense. Also consider the protein-to-carbohydrate ratio, as some products are weighted more heavily toward carbs while others offer a more balanced split.

Can weight gainer powders be used as part of a meal?

Absolutely. Many people blend mass gainer powder into oats, smoothies, or other whole-food bases to build high-calorie meals rather than drinking them as standalone shakes. This approach can make large calorie targets easier to reach while keeping a degree of variety in how you consume your nutrition. Origin Cream of Rice, for example, works particularly well as a food-based carbohydrate pairing alongside a protein source.

1. Protein contributes to a growth in muscle mass.  

2. Protein contributes to the maintenance of muscle mass.