Mutant Mass is a mass gainer that helps you build high quality muscle mass, thanks to a multi source protein blend that powers workouts. Mutant's long standing training heritage backs the quality you expect. Collaborations with professional athletes have helped shape this premium gainer for serious lifters. Quality standards and trusted results matter here.

Benefits & Features:

• Multi source protein blends fuel quick recovery and steady muscle repair after intense sessions.
• Fast digesting proteins aid recovery after workouts.
• Complex carbohydrates from oats and sweet potato provide steady energy for training.
• Calorie dense fats fuel energy needs and help you reach higher daily calories for rapid gains.
• Designed for everyday use, this mass gainer blends easily with water, milk, or smoothies, making protein shakes easier to enjoy while supporting your training goals.

Mutant Mass has earned a reputation among hard gainers and athletes, becoming a favourite worldwide for its premium formula and broad reach. The brand collaborates with professional athletes to fine tune the balance of fast and slow releasing proteins with a carbohydrate mix that includes whole food sources like oats and sweet potato. This approach supports energy during workouts and steady amino acid availability, helping lifters pursue meaningful gains.

Energy, Fat, Saturated, Trans, Cholesterol, Sodium, Potassium, Carbohydrate, Sugars, Fibre, Protein, Vitamin A, Vitamin C, Calcium, Iron, TYPICAL AMINO ACIDS, Leucine (BCAA), Isoleucine (BCAA), Valine (BCAA), Histidine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Glutamine + Glutamic Acid, Arginine, Cystine, Glycine, Tyrosine, Alanine, Aspartic Acid, Proline, Serine

• GTIN: 627933026954
• Manufacturer: Mutant
• Size: Chocolate Fudge Brownie / 6800 grams
• Categories: Best SellersMutant Whey Protein & Mass GainerSports SupplementsSubscribe & Save ProductsWeight Gainers & Muscle Mass Gainers
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

For best results, mix 2 scoops of MUTANT MASS with 2 cups of cold water or milk to assess tolerance, especially if you're new to high-calorie supplements. On training days, take 1 serving (4 scoops) immediately after your workout. On non-training days, consume 2 scoops in the morning and another 2 scoops in the afternoon. You can mix it with milk for extra calories. If you can't eat a meal, MUTANT MASS can be used as a meal replacement. Store in a cool, dry place away from direct sunlight. This product contains lactose; those who are lactose intolerant should avoid it. This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Protein (Multi-Source Blend)

Protein is a handy macronutrient essential for tissue building and repairing. This formula uses a multi-source protein blend comprising whey proteins, micellar casein and other milk proteins to provide a complete amino acid profile. This form combines fast- and slow-releasing proteins to support sustained amino acid availability for muscle recovery and growth signals.

What Does Protein Do?

Protein helps to support muscle protein synthesis and contributes to maintaining lean mass. Scientific research suggests multi-source protein blends can boost muscle gains when energy intake is adequate, as shown by Dr. Tang from Harvard University.

This product isn't intended to diagnose, treat, cure, or prevent any disease.

Mutant is a label with a recognised global footprint and a track record of innovation, celebrated as a multi-award winning, best-selling premium mass gainer in the world. This enduring reputation aligns with Welzo's promise to team up with manufacturers that bring proven market strength, elite athlete partnerships and continued product development across years of research.

Our team of medical experts has assessed Mutant Mass for compatibility with Welzo’s standards, and together we picked this brand based on its trusted industry stature and its long‑standing focus on crafting a flagship mass gainer formula. This brand’s reputation for quality is reinforced by its high‑calorie formula, featuring a diversified protein matrix and complex carbohydrate blends designed to support rapid mass gain alongside energy delivery.

Mutant Mass is a natural fit for this supplement category, and its heritage of ongoing refinement supports Welzo’s emphasis on expert curation and consumer safety. We are confident in this brand choice and in the consistency it brings to your wellness journey, backed by our team of medical experts and our rigorous testing protocols.