• Critical Mass Professional - Lean Mass Gainer

    Critical Mass Professional - Lean Mass Gainer

    5 flavours
    From £35.95 GBP
    From £35.95 GBP
  • Critical Mass high Calorie Gainer

    Critical Mass Original 6kg High Calorie Gainer

    6 flavours
    £54.95 GBP
    £54.95 GBP
  • Beef Mass Gainer

    Beef Mass Gainer

    5 flavours
    £49.95 GBP
    £49.95 GBP
  • Cream of Rice

    Cream of Rice

    5 flavours
    From £11.95 GBP
    From £11.95 GBP
  • Critical Oats Protein Porridge

    Critical Oats Protein Porridge

    8 flavours
    From £14.95 GBP
    From £14.95 GBP
  • Critical Oats Protein Porridge Pots
    Sale

    Critical Oats Protein Porridge Pots

    3 flavours
    From £1.95 GBP
    From £1.95 GBP £19.95 GBP
    Sale
  • Protein Cookie Dough Dessert

    Protein Cookie Dough Dessert

    9 flavours
    From £19.95 GBP
    From £19.95 GBP
  • BODYFUEL™ Mass Gainer

    BODYFUEL™ Mass Gainer

    4 flavours
    £44.95 GBP
    £44.95 GBP

Shop Weight & Mass Gainers

Applied Nutrition's Weight & Mass Gainers are formulated for athletes and active individuals looking to increase calorie intake in support of muscle growth, recovery, and performance. Each formula combines high-quality protein with carbohydrates and performance-focused ingredients to help achieve a calorie surplus and fuel demanding training. Choose from options like Critical Mass Professional for lean muscle gain, Beef Mass Gainer for a dairy-free version, Critical Mass Original for a high-calorie formulation, and more. These products offer a convenient option when whole-food meals are not feasible.

Weight & Mass Gainers FAQs

What is a mass gainer, and who should use one? 

Mass gainers are high-calorie supplements that combine protein and carbohydrates to help increase daily calorie intake. Also known as a weight gainer in some markets, they are best suited for athletes, hard gainers and active individuals who struggle to consume enough calories through food alone to support muscle growth and performance.

Do I need a mass gainer if I take protein? 

The right choice depends on your goals. Whey protein is designed to increase protein intake while keeping calories relatively low. Mass gainers provide substantially more calories and carbohydrates, making them better suited to those looking to gain size, increase bodyweight, or support periods of intense training.

Will a mass gainer help me build muscle? 

Mass gainers support muscle growth by making it easier to achieve the calorie and protein intake needed for a calorie surplus. Combined with progressive resistance training and a balanced diet, they can help support increases in muscle mass and strength by supporting recovery and nutrition.

Will using a mass gainer make me gain fat? 

Weight gain depends on your overall calorie intake. Mass gainers are designed to help create a calorie surplus, which is necessary for gaining muscle, but balancing your nutrition with a structured training programme is important for supporting lean gains. Each mass gainer is tailored to a specific need, supporting lean mass, vegan options or clean carbs depending on the formulation you choose.

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