Best Value Mass Gainer
£1.74 Per Serving
XL Nutrition XTRA Mass Gainer 5.2kg - 5.2kg / Chocolate
XL Nutrition

XTRA Mass Gainer 5.2kg

★★★★★
4.85 | 443 reviews |  20 Servings
£34.99 £59.99 £1.75/serving
Bigger Daily Shakes Higher-calorie format
More Than Whey Protein and carb blend
5.2kg Pack Built for repeat use
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Chocolate
Strawberry
Vanilla
Next Day · 30-Day Returns · UK Made
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Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle. If you are pregnant, breastfeeding, taking medication, or under medical supervision, consult your doctor before use. Do not exceed the recommended daily intake. Store out of reach of children.

Chocolate
Strawberry
Vanilla

XL Nutrition XTRA Mass Gainer, 1000 Calories and 50g Protein Per Serving for Hard Gainers

XL Nutrition XTRA Mass Gainer delivers 1000 calories per 260g serving, with 50g of protein from a whey and soy blend, 172.1g of carbohydrates from maltodextrin, ultra-fine oats powder and waxy maize starch, and 11.4g of fat. The 5.2kg tub provides 20 full servings across 3 flavour options.

The carbohydrate blend is designed for rapid absorption: maltodextrin for fast-digesting glucose, waxy maize starch for sustained energy, and oats powder for a more moderate glycaemic contribution. The protein blend uses whey protein concentrate and soy protein isolate alongside glutamine peptides for recovery. Creatine monohydrate is also included in the formula.

Mass gainers exist for one reason: some people genuinely struggle to eat enough calories to grow. Whether due to a fast metabolism, a demanding schedule or a naturally low appetite, the gap between current intake and the surplus needed for muscle growth can be hard to close with food alone. XTRA Mass Gainer turns a 1000-calorie meal into a single shake that takes under a minute to prepare.

Mix one full serving (260g) with 500 to 700ml of water or milk. For a lower-calorie approach, use half a serving (500 calories). This product suits hard gainers, ectomorphic body types and anyone in a committed gaining phase. It is not designed for people trying to lose weight or maintain a lean physique. For a lower-calorie mass gainer option, XL XTRA Protein and Carbs provides 386 calories and 33g protein per serving. Contains milk, soy and gluten.

Key Benefits

High-Calorie

1000 calories to help you bulk up fast.

Muscle-Building Protein

50g of premium protein to support muscle growth and recovery.

Ideal for Hard Gainers

Perfect for anyone struggling to meet daily calorie and protein needs.

Supports Recovery

Helps replenish muscles post-training, reducing fatigue and soreness.

Frequently Asked Questions

When should I drink a mass gainer shake?

The best times are after training (when your body is primed for nutrient uptake), between meals (to boost total daily calories), or before bed (if your calorie target allows it). At 1000 calories per serving, most people use XTRA Mass Gainer once per day at whatever time fits their eating schedule. Spreading it across two half-servings can reduce the volume per sitting if that is more comfortable.

Is XTRA Mass Gainer just protein powder with sugar?

No. While the total carbohydrate content is high (172g per serving), sugar accounts for only 18.7g. The main carb sources are maltodextrin, oat powder and waxy maize starch, which are complex and fast-absorbing starches, not simple sugars. The formula also includes 50g of protein, creatine monohydrate and glutamine peptides. It is a complete caloric support product, not just flavoured sugar.

How does XTRA Mass Gainer compare to XTRA Protein and Carbs?

XTRA Mass Gainer delivers 1000 calories, 50g protein and 172g carbs per 260g serving. XTRA Protein and Carbs delivers 386 calories, 33g protein and 50g carbs per 100g serving. Mass Gainer is for hard gainers who need maximum calories per shake. Protein and Carbs is for people who want a more moderate calorie boost with a better protein-to-carb ratio. Choose based on how many extra calories you actually need.