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Serious weight gain requires serious calories. Optimum Nutrition Serious Mass is the ultimate weight gain formula.
Those who need the extra calories most often have the toughest time consuming enough of them. For many aspiring to be bigger, Serious Mass is the ultimate in weight gain formulas. With over 1,250 calories per serving to boost daily calorie intake, 50g high protein to support muscle growth and repair, over 250g carbohydrates, and now with 3g of added creatine per serving to support performance, you’ve got nothing to lose and lots to gain. It is time to stop thinking small and get serious – SERIOUS MASS.
Use anytime, it is quick, convenient and easy to prepare. Serious Mass is ideal between meals, after weight training as part of your recovery routine and before bed. Just mix two scoops of Serious Mass (334g) with 710ml of water to create a tasty, calorie-packed shake.
(Based on 214 reviews)
The subjective customer reviews below are only moderated for offensive content – they should not be regarded as medical or health advice; no reliance should therefore be placed on them; and they are not endorsed by Holland & Barrett. If you have any health problems or questions regarding the suitability of any product please contact a health professional. Products are not medicinal unless otherwise stated.
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“I've become a superhuman muscular freak!!!”
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“Its great however it is expensive”
Yes, I recommend this product.
Verified Purchaser
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“Good stuff”
No, I do not recommend this product.
Verified Purchaser
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“This was my 3rd Flavour and I have got to say probably my favourite so far. In terms of effectiveness it has helped me gain 8kg in 3 months. It offers a really filling portion which for me is great at any time of the day. Definitely seeing the results of increasing my calorie intake”
Yes, I recommend this product.
Verified Purchaser
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“Put on 5kg in my first month and i have never put on weight!”
Yes, I recommend this product.
Verified Purchaser
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“Great helps me gain weight and gives me that boost of energy and strength when needed”
Yes, I recommend this product.
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“I went to Holland and barret to buy this and its so good and does the job I am going back today to get some more :)”
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“Great stuff!”
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“Very easy to blend and tastes great. has helped maintain my weight (I use it as a weight gain supplement). Would be better if the price wasn’t so expensive.”
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“Very Happy 😊”
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Full ingredients
Maltodextrin, WHEY Protein Concentrate [MILK], Calcium CASEINATE [MILK], Fat-Reduced Cocoa Powder, Creatine Monohydrate, Flavouring, MILK Mineral Complex, Medium Chain Triglycerides [MILK], EGG Albumen, Sodium Chloride, Dipotassium Phosphate, Vitamin and Mineral Blend (Sodium L-Ascorbate, Ferric Pyrophosphate, D-Alpha-Tocopheryl Acetate, Nicotinamide, Zinc Oxide, Retinyl Acetate, Calcium D-Pantothenate, Sodium Fluoride, Manganese Sulphate, Potassium Iodate, Cyanocobalamin, D-Biotin, Chromium (III) Chloride, Pteroylmonoglutamic Acid, Cholecalciferol, Sodium Selenite, Cupric Citrate, Pyridoxine Hydrochloride, Thiamine Hydrochloride, Phylloquinone, Riboflavin, Sodium Molybdate), Glutamine Peptides [WHEAT GLUTEN], L-Glutamine, Magnesium Oxide, WHEY Powder [MILK], Inositol, L-Ascorbic Acid, Sweetener (Sucralose), Antioxidant (Tocopherol-Rich Extract), Calcium D-Pantothenate, Pteroylmonoglutamic Acid. For Allergens - See ingredients in bold.
Always read the label before use
| Per | 100g / 334g (Per Serving) |
| Energy Kj | 1582Kj / 5284Kj |
| Energy Kcal | 378Kcal / 1263Kcal |
| Fat | 1.7g / 5.5g |
| Of Which Saturates | 0.7g / 2.4g |
| Carbohydrate | 75g / 251g |
| Of Which Sugar | 7.7g / 26g |
| Fibre | 1.0g / 3.2g |
| Protein | 15g / 50g |
| Salt | 0.47g / 1.56g |
| Vitamin A | 192µg 24% / 640µg 80% |
| Vitamin D | 1.2µg 24% / 4.0µg 80% |
| Vitamin E | 2.7mg 22% / 9.0mg 75% |
| Vitamin K | 22µg 30% / 75µg 100% |
| Vitamin C | 19mg 24% / 64mg 80% |
| Thiamin | 0.27mg 24% / 0.89mg 81% |
| Riboflavin | 0.34mg 25% / 1.1mg 82% |
| Niacin | 3.9mg 24% / 13mg 81% |
| Vitamin B6 | 0.33mg 24% / 1.1mg 79% |
| Folic Acid | 45.1µg 23% / 151µg 75% |
| Vitamin B12 | 2.2µg 88% / 7.4µg 294% |
| Biotin | 11µg 22% / 37µg 75% |
| Pantothenic Acid | 1.4mg 22% / 4.5mg 75% |
| Calcium | 180mg 22% / 600mg 75% |
| Phosphorus | 159mg 23% / 532mg 76% |
| Magnesium | 85.8mg 23% / 287mg 76% |
| Iron | 5.4mg 39 / 18mg 129% |
| Zinc | 3.2mg 32% / 11mg 106% |
| Copper | 0.41mg 41% / 1.4mg 136% |
| Manganese | 0.60mg 30% / 2.0mg 100% |
| Fluoridi | 1.0mg 30% / 3.5mg 100% |
| Selenium | 17µg 30% / 55µg 101% |
| Chromium | 14µg 34% / 46µg 114% |
| Molybdenum | 17µg 34% / 57µg 114% |
| Creatine | 0.9g / 3.0g |
| Reference Intake | % |
Not intended for use by persons under the age of 18.
We go to great efforts to ensure that the information on this page is accurate at the time that the page was last edited. As we are constantly reviewing and developing our products to meet our consumer needs, consumers, particularly those that suffer from allergies and intolerances, should always check product labelling, warnings, and directions provided with the product that is delivered, prior to use or consumption.
Add two heaped scoops of Serious Mass to a blender filled with 710 ml of water. Blend for 45-60 seconds. Then add a few ice cubes and, if desired, other calorie-contributing ingredients and blend for an additional 30-45 seconds.
Tips: Mixing two scoops of Serious Mass with 710 ml of non-fat or low fat milk instead of water will give you a thicker, creamier, higher-calorie shake. New users may find if beneficial to begin with 1/2 of a serving daily for the first week and then gradually increase to 1 or more full servings several times a day. Serious Mass is a substantial weight-gain supplement that can be used to feed serious calorie needs in a variety of different ways. Between Meals: Drink 1/2 - 1 serving of Serious Mass between meals to maintain positive nitrogen balance and support a high-calorie diet. Post-Workout: Begin drinking 1/2-1 serving of Serious Mass 30-45 minutes following exercise to support maximum recovery. Before Bed: Drink 1/2 - 1 serving of Serious Mass about 45-60 minutes before bed to provide nutrients to recovering muscle throughout the night. Note: For best results use Serious Mass combined with intense weight training (3-5 times per week) and a sensible whole foods diet. Also, keep in mind that sufficient recovery between workouts impacts your ability to gain lean mass. Allowing at least 48 hours between workouts involving the same body parts is recommended.Please ensure you read the label of all products purchased as part of this bundle before use.
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