Supplements & Protein for Muscle Growth & Size | MaxiNutrition

Build size, strength, and muscle mass with MaxiNutrition's Size & Gain range. Our high-calorie protein powders and mass gain supplements are expertly formulated with the ideal blend of protein, carbohydrates, and calories to support effective muscle growth. Whether you're bulking up or working towards strength goals, fuel your progress with trusted sports nutrition.
  • Accelerated Muscle Growth and Increased Mass

  • Informed Sport Accredited

  • Ultra-Filtered Premium Ingredients

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2 Products
2 Products

Progain All-In-One Protein Powder

£39.99

4 Flavours

Progain X3 Mix & Match Bundle

£94.99

27 Flavours

Unleash Your Potential With Maxi Nutrition's Supplements.

Train for More. Become Your Best

MaxiNutrition is Informed Sport Certified, meaning every batch is tested for banned substances. Backed by science, our proven formulas are designed to deliver real results. Trusted since 1995, we’ve built over 30 years of expertise and are relied on by athletes at every level – from professionals to everyday competitors.

Informed Sport

Trusted For 30+ Years

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