Cheapest Mass Gainer UK

Mass gainers combine protein with high amounts of carbohydrates and calories, designed for people who struggle to eat enough to support muscle growth. A typical serving can contain 300-500+ calories alongside 20-40g of protein.

We track mass gainer products across UK retailers, sorted by price per 100g. Because serving sizes and calorie content vary enormously between brands, comparing by weight gives you a much clearer picture of value than comparing by serving.

Mass gainers are most useful if you have a fast metabolism, struggle to eat large meals, or are in a dedicated bulking phase. If your goal is lean muscle without excess calories, a standard whey protein with a separate carbohydrate source may be more cost-effective and flexible.