20% off £25 or 25% off £40*

Code:HBWDAY
 

20% off £25 or 25% off £40*

Code:HBWDAY

OffersH&B Wellness Day SaleSave up to 1/2 Price3 for 2 Mix & MatchBetter than 1/2 priceBuy 1 Get 1 FreeBuy one get one 1/2 priceNaturya Gift with PurchaseBundlesOutlet2 For £5 Mix & MatchMarketplace OffersIntroductory OfferTriActive Gift with PurchaseHealth&Her Gift with PurchaseBio&Me Gift with PurchaseON Gift with PurchaseVitamins & SupplementsVitamins & Supplements Shop AllHair, Skin & NailsCollagen & SilicaMuscle Support & Joint PainDigestive HealthMagnesiumFunctional MushroomsVitaminsShop all VitaminsMultivitaminsVitamin AVitamin BVitamin CVitamin DVitamin EVitamin KVitamin DrinksMineralsShop all MineralsMagnesiumIronZincCalciumSeleniumChromiumSupplementsShop all SupplementsFibre SupplementsAcidophilus & Friendly BacteriaPeppermint OilGrapeseed ExtractLecithinCollagen & SilicaOmega & Fish OilsPlant Sourced SupplementsSuperfood SupplementsArnicaApple CiderRaspberry KetonesAloe VeraChondroitin & MSMCo Enzyme Q10Evening Primrose OilGarlicGinkgo BilobaGlucosamineGlucomannanSeaweed, Kelps and Aquaceuticals5 HTPDigestive EnzymesSaw palmettoCharcoalConditionShop all ConditionCholesterolAllergy & Hay Fever CareAnxiety SupportBone & Muscle HealthMuscle Support & Joint PainBrain & Memory SupportWomen's HealthMen's HealthChildren's HealthCold & Immune SupportFatigueDigestive HealthHair, Skin & NailsHeart & CirculationLiver CareMood SupportSexual HealthSleep & RelaxationStress ReliefVisionWomen's HealthShop all Women's HealthPerimenopauseMenopauseMenstrual SupportUrinary Tract HealthPregnancy & ConceptionMen's HealthShop all Men's HealthProstate HealthChildren's HealthCBD Vitamins & SupplementsShop all CBD Vitamins & SupplementsCBD OilCBD CapsulesCBD SprayCBD GummiesHerbal & Licensed RemediesShop all Herbal & Licensed RemediesRescue RemedyAshwagandhaMilk ThistleGinseng & GuaranaHomeopathic & Flower RemediesShop all Homeopathic & Flower RemediesRescue RemedyTissue SaltsFlower RemediesHomeopathic RemediesAt-Home TestsVegan Vitamins & SupplementsHolland & BarrettVitabioticsSolgarNew NordicBioglanWeledaGrass & Co.NovominsWild NutritionBetterYouH&B Wellness Day SaleSave up to 1/2 Price3 for 2 Mix & MatchBetter than 1/2 priceBuy 1 Get 1 FreeOutletBundlesMarketplace OffersDairy FreeGluten FreeSesame Seed FreeSugar FreeSoya FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeFish FreeLion's Mane MushroomApple Cider VinegarReishi MushroomCollagenChaga MushroomArnicaMaitake MushroomShiitake MushroomAstragalusCastor OilNew inFood & DrinkFood & Drink Shop AllVegan Food & DrinkShop all Vegan Food & DrinkMeat-Free AlternativesDairy Free DrinksEgg SubstitutesVegan ProteinVegan Protein BarsDried Fruit, Nuts & SeedsShop all Dried Fruit, Nuts & SeedsDried FruitNutsSeedsMixesChocolate CoatedManuka HoneyTeas, Coffee & Hot BeveragesShop all Teas, Coffee & Hot BeveragesCoffee & Coffee SubstitutesMushroom DrinksHot ChocolateTeasSuperfood TeasMatcha & Green TeaHerbal TeaPeppermint TeaSleep & RelaxationSlimming TeaWomen's Health TeasDrinks & JuicesShop all Drinks & JuicesMultipack DrinksJuices & Health ShotsNatural Energy DrinksCoconut WaterKombuchaCBD DrinksSoft DrinksWaterAlcohol Free DrinksProtein ShakesSuperfoodsShop all SuperfoodsSuperfood BlendsSupergreensMoringa PowderSpirulinaMaca PowderFlaxseedBaobabChia SeedsGoji BerriesGut HealthHealthier SnackingShop all Healthier SnackingSweet SnacksSavoury SnacksLow Calorie SnacksChocolateCrisps & ChipsCrackers & CrispbreadsBiscuits & CookiesSnack BarsFlapjacksLiquoricePopcornSweets & MintsChocolate Coated SnacksFood CupboardShop all Food CupboardApple Cider VinegarCondiments & SaucesMeat-Free AlternativesSoup & Ready MealsRice, Pasta, Pulses & GrainsGravy, Broths & StockHoney, Jams & SpreadsShop all Honey, Jams & SpreadsManuka HoneyHoneyNut ButtersJams & ChutneysSyrupsSpreadsPateBreakfast CerealsShop all Breakfast CerealsCereals, Bran & FlakesGranolaMuesliOats & PorridgeBreakfast BarsCookingShop all CookingCooking IngredientsApple Cider VinegarCondiments & SaucesMeat-Free AlternativesSoup & Ready MealsRice, Pasta, Pulses & GrainsTinned FoodsHerbs, Spices & SeasoningGravy, Broths & StockHome BakingShop all Home BakingBaking IngredientsBaking MixesBreadFlourSweeteners & Sugar AlternativesEgg SubstitutesDairy Free DrinksShop all Dairy Free DrinksOat, Rice & Hemp DrinksSoya DrinksNut DrinksCoconut DrinksDesserts & CreamsNutritionally Complete FoodCoconutHolland & BarrettNaturyaGrenadeTwiningsNakdHeath & HeatherManuka DoctorPerfectTedPukkaEgmont HoneyH&B Wellness Day SaleSave up to 1/2 PriceBetter than 1/2 priceNaturya Gift with Purchase3 for 2 Mix & Match2 For £5 Mix & MatchBuy one get one 1/2 priceBundlesGluten FreeDairy FreeWheat FreeSugar FreeEgg FreeMilk FreeNut FreeSesame Seed FreeSoya FreeCelery FreeLion's Mane MushroomApple Cider VinegarReishi MushroomChaga MushroomTremella MushroomTrumpet MushroomNew inSports NutritionSports Nutrition Shop AllProteinShop all ProteinWhey ProteinClear ProteinMass GainersVegan ProteinDiet ProteinCaseinSports SupplementsShop all Sports SupplementsTestosteroneElectrolytesEnergy GelsSports CollagenCreatineShop all CreatineCreatine PowderCreatine CapsulesBars, Drinks & SnacksShop all Bars, Drinks & SnacksEnergy BarsProtein BarsProtein ShakesProtein SnacksNutritionally Complete FoodMeal Replacement ShakesPre Workout & EnergyShop all Pre Workout & EnergyPre WorkoutCaffeine Free Pre WorkoutAmino Energy PowdersIntra WorkoutPost WorkoutKetoAmino AcidsShop all Amino AcidsAmino Energy PowdersBCAAL-LysineGlutamineCarnitineArginineVegan Sports NutritionShop all Vegan Sports NutritionVegan ProteinVegan Protein BarsVegan Pre Workout & EnergyVegan Amino AcidsVegan CreatineSports AccessoriesShop all Sports AccessoriesBottles & ShakersFitness EquipmentApplied NutritionOptimum NutritionPrecision EngineeredUSNMyproteinGrenadeHuelTriActivePhDSiSH&B Wellness Day SaleSave up to 1/2 Price3 for 2 Mix & MatchBuy 1 Get 1 FreeTriActive Gift with PurchaseOutletBundlesBetter than 1/2 priceGluten FreeDairy FreeSugar FreePalm Oil FreeSoya FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeFish FreeApple Cider VinegarNew inBeautyNatural Beauty Shop AllSkincareShop all SkincarePremium SkincareFace CareBody CareSun CareTanning & BronzingEye CareLip CareFoot CareHand & Nail CareSkin AilmentsSkin OilsCBD BeautyFace CareShop all Face CareCleanser & TonerFace MoisturiserFace Oil & SerumFace WashFace Exfoliators & ScrubsFace MasksHair CareShop all Hair CareShampoo & ConditionerHair ColouringHair MasksHair Oil & SerumHair Spray, Gel & MousseHair AccessoriesWashing & BathingShop all Washing & BathingShampoo & ConditionerBathing AccessoriesFeminine CareShower Gel & Body WashDeodorantDentalHand WashSoapBath Soak & OilBody ScrubBath Bombs & SaltsIncontinence SupportAromatherapy & HomeShop all Aromatherapy & HomePure Essential OilsBlended Essential OilsBase & Carrier OilsHolisticMother & BabyShop all Mother & BabyBaby Skincare & ToiletriesElectrical WellnessDr OrganicFaith in NatureWeledaNaturtintTisserandQ+AMiaromaSukinAveenoTrilogyH&B Wellness Day SaleSave up to 1/2 PriceBuy 1 Get 1 FreeBetter than 1/2 priceBuy one get one 1/2 price3 for 2 Mix & MatchBundlesOutletAlcohol FreeFluoride freeParfum FreeGluten FreePalm Oil FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeFish FreeVitamin CTea TreeRosehipRosemaryVitamin EHyaluronic AcidAloe VeraLavenderSeaweedSalicylic AcidNew inWeight ManagementWeight Management Shop AllFat Burners, Binders & Appetite SuppressantsShop all Fat Burners, Binders & Appetite SuppressantsFat BurnersFat BindersAppetite SuppressantsSlimming TabletsWeight Management Shakes Shop all Weight Management Shakes Meal Replacement ShakesDiet ProteinDiet Food & DrinkShop all Diet Food & DrinkSlimming TeasHealthier CookingLow Calorie SnacksFruit, Nuts & SeedsJuices & Health ShotsApple Cider VinegarExercise SupportShop all Exercise SupportFitness EquipmentMeal Replacement ShakesDiet ProteinProtein BarsHolland & BarrettUSNTREKEat WaterFrejaIdeal HealthNudie SnacksBraggGrenadeNatures AidH&B Wellness Day SaleSave up to 1/2 PriceBetter than 1/2 price3 for 2 Mix & MatchIntroductory OfferBuy one get one 1/2 priceShort Dated June 2025Gluten FreeSugar FreeWheat FreeDairy FreeCelery FreeCrustaceans FreeEgg FreeFish FreeKiwi FreeLupin FreeApple Cider VinegarLion's Mane MushroomReishi MushroomSea MossNew inHealth & WellnessShop all Health & WellnessHair & Skin HealthChildren's HealthEye HealthBrain HealthEmotional WellbeingHeart HealthImmunityMen's HealthWomen's HealthExercise & PerformanceEnergyJoints, Bones, & MusclesGut HealthSleep & RelaxationHolland & BarrettDr OrganicVitabioticsFaith in NatureWeledaOptimum NutritionApplied NutritionPrecision EngineeredNaturtintQ+AH&B Wellness Day SaleSave up to 1/2 Price3 for 2 Mix & MatchBetter than 1/2 priceBuy 1 Get 1 FreeBuy one get one 1/2 priceNaturya Gift with PurchaseOutletGluten FreeDairy FreeAlcohol FreeSugar FreeParfum FreeWheat FreeEgg FreeSesame Seed FreeSoya FreeCelery FreeVitamin CLion's Mane MushroomApple Cider VinegarTea TreeRosehipVitamin EHyaluronic AcidReishi MushroomAloe VeraLavenderNew inNew InTrendingThe best of Holland & BarrettMedicines and HealthcareShop all Medicines and HealthcareHayfever & Allergy RemediesPain ReliefCough, Colds & Sore ThroatAntacids & GastrointestinalInfant & BabiesFemale HealthHaemorrhoids & Piles TreatmentsEar Care & Eye HealthFoot Care & Health Skin & ScalpMouth & Oral CareHair & ScalpTravelCareNurofenE45OilatumStrepsilsTiger BalmAnadinAnusolBeechamsBenylinH&B Wellness Day SaleSave up to 1/2 PriceBuy one get one 1/2 price3 for 2 Mix & MatchNew inVeganShop for your WellnessGut HealthImmunityEnergySkincareWomen's HealthMenstrual HealthMenopauseJoints, Bones & MusclesHair, Skin & NailsSleep & RelaxationFood & DietChildren's HealthStress ReliefHealthy HeartLow Mood & DepressionConcentration & AlertnessEye HealthSexual HealthLearn about WellnessJoints, Bones & MusclesEnergyWomen's HealthPeriods & Cycle HealthMenopauseImmunityGut HealthFood & DietSports & FitnessSleep & RelaxationHair Skin & NailsArticlesAll articlesHealthFood & nutritionGut healthImmunityJoints, bones & musclesWomen's healthWellnessHair & skinMental wellbeingSeasonalSleep & relaxationSports nutritionRecipesAll recipesGluten freeLow sugarVeganDairy freePodcast
Skip to content

18+

Shop all Optimum Nutrition 

Optimum Nutrition Serious Mass Vanilla 2.7kg

Exercise & Performance

Ultimate weight gain formula

1260 kcal per serving

50g protein per serving

Current price: £40.00

£1.48/100 g

SKU: 005293

160 Rewards for Life points with this purchase

Optimum Nutrition Serious Mass Vanilla 2.7kg

Current price: £40.00

Shop all Building Muscle

Per serving (335g)

Protein

50g

Energy

1259Kcal (376/100g)

Fat

6.2g (saturates 3.4g)

Carbs

250g

Salt

1.89g

Sugars

12g

Serious weight gain requires serious calories. Optimum Nutrition Serious Mass is the ultimate weight gain formula.

  • For muscle building and weight gain
  • More than 1260 kcal per serving to help boost your calorie intake
  • 50g protein per serving
  • 25 vitamins & supplements

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.

Full ingredients

Maltodextrin, WHEY Protein Concentrate [MILK], Calcium CASEINATE [MILK], Flavourings, Creatine Monohydrate, MILK Mineral Complex, Medium Chain Triglycerides [MILK], EGG Albumen, Dipotassium Phosphate, Sodium Chloride, 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 May contain nuts and peanuts.

Always read the label before use

Per 100g / 335g portion
Energy 1572kJ / 5267kJ / 376kcal / 1259kcal
Fat 1.8g / 6.2g
of which saturates 1.0g / 3.4g
Carbohydrates 75g / 250g
of which sugars 3.6g / 12g
Protein 15g / 50g
Salt 0.57g / 1.89g
Vitamin A 198 μg / 664 μg
Vitamin D 1.2 μg / 4.2 μg
Vitamin E 2.7 mg / 9.0 mg
Vitamin K 22 μg / 75 μg
Viamin C 19 mg / 63 mg
Thiamin 0.27 mg / 0.90 mg
Riboflavin 0.34mg / 1.1mg
Niacin 4.0 mg / 13 mg
Vitamin B6 0.34 mg / 1.1 mg
Folic Acid 44.6 μg / 149 μg
Vitamin B12 0.56 μg / 1.9 μg
Biotin 12 μg / 39 μg
Pantothenic Acid 1.3 mg / 4.5 mg
Calcium 227 mg / 760 mg
Phosphorus 158 mg / 530 mg
Magnesium 0.60 mg / 2.0 mg
Iron 4.2mg / 14mg
Zinc 3.0mg / 10mg
Copper 0.30mg / 1.0mg
Manganese 0.60mg / 2.0mg
Fluoride 0.87 mg / 2.9 mg
Selenium 16µg / 55µg
Chromium 10 μg / 33 μg
Molybdenum 12 μg / 42 μg
Iodine 44.7 μg / 150 μg
Creatine 0.9g / 3.0g

Advisory Information:

Not intended for use by persons under the age of 18

Remember to:

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.

Directions:

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.

4.4

178 reviews

Customer reviews below are moderated for offensive content only. They are not medical advice, should not be relied upon, and are not endorsed by Holland & Barrett. For health issues or product suitability, consult a health professional. Products are not medicinal unless stated otherwise. Find out more

Pros mentioned

ON the spot

Verified Purchaser

Perfect to grow fast and with low fats

NcFrozt - 2 months ago

Was this review useful?

Body change

Verified Purchaser

I actually got this for a friend and he has been enjoying it as muscle in the gym are stronger and big too…

Heischiboi - 3 months ago

Was this review useful?

Mass

Verified Purchaser

Had for a few months and does what it says on the tin,has helped me build muscle 💪

Bennn - 3 months ago

Was this review useful?

Mega savings
View all

Compare similar products

Product name

Price

Rating

Flavour

Quantity and format

Suitable for

This product

Optimum Nutrition Serious Mass Vanilla 2.7kg
Price

£40.00

£1.48/100 g

Rating

4.4

Flavour

Vanilla

Quantity and format

2700 g

Suitable for

-

Ingredients

Compare products

Select up to 3 similar products to compare

Our promise

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.

Sign up for exclusive offers

Plus, get expert advice to support your health & wellness straight to your inbox when you sign up to Holland & Barrett emails.