Optimum Nutrition Serious Mass 2.73kg Strawberry
Optimum Nutrition Serious Mass 5.45kg Banana
Optimum Nutrition Serious Mass 2.73kg Strawberry
Optimum Nutrition Serious Mass 5.45kg Banana
"Very quick delivery. Used 3 times, each order arrived the next day before 12:00"
Hugo Dover
"Reliable & original products, with fast next day delivery. Have been using Welzo for over a year now."
Elina Goulliard
"Welzo is great, lots of support from customer service who are easy to get a hold of and quick delivery."
Elizabeth Moore

Product Description

Designed to support muscle growth and weight gain, this premium supplement delivers a powerful 1,250 calories per serving, making it ideal for those who find it challenging to increase their calorie intake or need extra fuel for intense training. Each serving provides 50 grams of high-quality protein sourced from a blend of whey, casein, and egg proteins, ensuring a steady release of amino acids to optimize muscle recovery and reduce breakdown.

With 252 grams of carbohydrates derived primarily from maltodextrin and complex sources, it replenishes glycogen stores and supplies sustained energy to power through demanding workouts. Enriched with 25 essential vitamins and minerals—including Vitamin C, Vitamin D, B Vitamins, and zinc—this formula supports overall health, immune function, and well-being.

Additional performance-enhancing ingredients such as creatine, glutamine, and glutamic acid further aid in improving recovery and boosting workout capacity. Whether mixed with water, milk, or your favorite beverage, the delicious fruit flavors make consumption enjoyable and convenient.

This supplement is an excellent choice for athletes and fitness enthusiasts aiming to gain size, strength, and maintain optimal health through a balanced, nutrient-rich calorie boost.

Ingredients/Specifications

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

Welzo is a marketplace and is not liable for discrepancies on the website. Check product packaging for exact information.

UK Delivery & Returns

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.

How to use

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.

Nutritional Information

Amount
Container Size2727g
Serving Size2 scoops (334g) Servings Per Container: 8 Container Size: 5455g Serving Size: 2 scoops (334g) Servings Per Container: 16
Amount Per ServingProtein-
Carbohydrates-
Fat-
Salt-
IngredientsMaltodextrin, 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

Optimum Nutrition Serious Mass

60 Reviews
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Designed to support muscle growth and weight gain, this premium supplement delivers a powerful 1,250 calories per serving, making it ideal for those who find it challenging to increase their.
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Product Description

Designed to support muscle growth and weight gain, this premium supplement delivers a powerful 1,250 calories per serving, making it ideal for those who find it challenging to increase their calorie intake or need extra fuel for intense training. Each serving provides 50 grams of high-quality protein sourced from a blend of whey, casein, and egg proteins, ensuring a steady release of amino acids to optimize muscle recovery and reduce breakdown.

With 252 grams of carbohydrates derived primarily from maltodextrin and complex sources, it replenishes glycogen stores and supplies sustained energy to power through demanding workouts. Enriched with 25 essential vitamins and minerals—including Vitamin C, Vitamin D, B Vitamins, and zinc—this formula supports overall health, immune function, and well-being.

Additional performance-enhancing ingredients such as creatine, glutamine, and glutamic acid further aid in improving recovery and boosting workout capacity. Whether mixed with water, milk, or your favorite beverage, the delicious fruit flavors make consumption enjoyable and convenient.

This supplement is an excellent choice for athletes and fitness enthusiasts aiming to gain size, strength, and maintain optimal health through a balanced, nutrient-rich calorie boost.

Ingredients/Specifications

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

Welzo is a marketplace and is not liable for discrepancies on the website. Check product packaging for exact information.

UK Delivery & Returns

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.

How to use

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.

Nutritional Information

Amount
Container Size2727g
Serving Size2 scoops (334g) Servings Per Container: 8 Container Size: 5455g Serving Size: 2 scoops (334g) Servings Per Container: 16
Amount Per ServingProtein-
Carbohydrates-
Fat-
Salt-
IngredientsMaltodextrin, 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

See full range

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Disclaimer

Content team: Dr Sameer Nakedar

Role: Chief Medical Officer

MBBS (London, UK), MRCGP, PGCert

Content team: Paola Drexlar

Role: Medical Content Writer, UK

BA (Hons) Journalism