Optimum Nutrition Serious Mass

Maltodextrin, Protein Blend (Whey Protein Concentrate, Calcium Caseinate, Egg Albumen, Sweet Dairy Way), Creatine Monohydrate, L-Glutamine, Glutamine Peptides, Choline (as Choline Bitartrate), Inositol, Paba (Para-Aminobenzoic Acid), Artificial Flavor, Vitamin & Mineral Blend (Di-Potassium Phosphate, Magnesium Aspartate, Di-Calcium Phosphate, Calcium Citrate, Ascorbic Acid, Niacinamide, Zinc Citrate, Beta Carotene, d-Calcium Pantothenate, d-alpha Tocopherol Succinate, Selenomethionine, Copper Gluconate, Ferrous Fumarate, Manganese Amino Acid Chelate, Thiamin Mononitrate, Pyridoxine Hydrochloride, Riboflavin, Chromium Picolinate, Folic Acid, Biotin, Molybdenum Amino Acid Chelate, Cholecalciferol, Potassium Iodide, Cyanocobalamin), Medium Chain Tri-glycerides, Acesulfame Potassium

United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched 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 14 days in the same original and unopened packaging. Subject to T&C's.

Welzo is a UK-based health platform. Orders ship from the UK.

For best results, consume this 1263-calorie serving mindfully. Each portion delivers 50g of muscle-supporting protein and 251g of energy-rich carbohydrates. Monitor your saturated fat intake, with 2.4g present per serving from the total 5.5g fat content. The 26g of sugars and 3.2g of fiber support balanced energy release. Contains 1.56g salt - adjust other daily sodium intake accordingly. (5284 kJ total energy value)

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

	Amount
Container Size	2727g
Serving Size	2 scoops (334g) Servings Per Container: 8 Container Size: 5455g Serving Size: 2 scoops (334g) Servings Per Container: 16
Amount Per Serving	Protein	-
	Carbohydrates	-
	Fat	-
	Salt	-
Ingredients	Maltodextrin, Protein Blend (Whey Protein Concentrate, Calcium Caseinate, Egg Albumen, Sweet Dairy Way), Creatine Monohydrate, L-Glutamine, Glutamine Peptides, Choline (as Choline Bitartrate), Inositol, Paba (Para-Aminobenzoic Acid), Artificial Flavor, Vitamin & Mineral Blend (Di-Potassium Phosphate, Magnesium Aspartate, Di-Calcium Phosphate, Calcium Citrate, Ascorbic Acid, Niacinamide, Zinc Citrate, Beta Carotene, d-Calcium Pantothenate, d-alpha Tocopherol Succinate, Selenomethionine, Copper Gluconate, Ferrous Fumarate, Manganese Amino Acid Chelate, Thiamin Mononitrate, Pyridoxine Hydrochloride, Riboflavin, Chromium Picolinate, Folic Acid, Biotin, Molybdenum Amino Acid Chelate, Cholecalciferol, Potassium Iodide, Cyanocobalamin), Medium Chain Tri-glycerides, Acesulfame Potassium
Please Note:	Nutritional facts and ingredients may vary slightly between flavours

The Active Ingredient Is: Protein (Whey Protein)

Protein plays a role in providing essential amino acids that support normal muscle maintenance and growth as part of a balanced diet.

This form combines whey protein with dairy and egg-derived proteins to deliver a complete amino acid profile in a highly bioavailable form.

What Does Protein Do?

Protein assists with muscle protein synthesis and recovery following exercise, supporting daily fitness goals. This function aligns with EFSA and NHS guidance on protein’s role in everyday muscle health.

Evidence from sports nutrition research supports the importance of adequate protein intake to support muscle growth when paired with physical activity.

*This product is not intended to diagnose, treat, cure, or prevent any disease.

Optimum Nutrition sets a science‑driven standard in sports nutrition, and this brand’s commitment to manufacturing excellence informs why we chose them as our supplier for Serious Mass. Their facilities operate under GMP and are NSF International certified, underpinning rigorous quality and safety alongside third‑party testing for label accuracy and ingredient purity. This focus on dependable manufacturing aligns with our own quality assurance practices, which are verified by our quality certification process.

Our vetting criteria centre on credibility, traceability, and manufacturing integrity, and Optimum Nutrition consistently meets these benchmarks with a long‑standing reputation in the industry as a global leader in weight‑gainer formulation. This brand’s heritage in delivering high‑calorie, protein‑rich supplements positions it as a natural fit for Serious Mass, supporting a product that is designed for individuals with high energy needs to gain mass and recover after training.

We selected Optimum Nutrition because this brand demonstrates robust quality standards, clear manufacturing controls, and a proven track record in the British market. This partnership is reinforced by our expert team of doctors, nurses, and nutritionists and aligns with our commitment to transparency and trusted supplementation for on‑course delivery to customers.