Get 20% off all protein powders with Unidays

 

Get 20% off all protein powders with Unidays

🏷️ Buy 1 Get 1 Half PriceOffersOffers HubBuy one get one 1/2 priceSave up to 1/2 PriceGreat SavingsBuy 1 Get 1 FreeShort DatedBetter than 1/2 price2 for £60 Mix & MatchVitamins & SupplementsVitamins & Supplements HubVitamins & Supplements Shop AllCBDShop all CBDCBD CapsulesCBD DropsCBD GummiesCollagen & SilicaHair, Skin & NailsShop all Hair, Skin & NailsHair GrowthFunctional 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 HTPSaw palmettoCharcoalWomen's HealthShop all Women's HealthMenopauseMenstrual SupportUrinary Tract HealthPregnancy & ConceptionMen's HealthShop all Men's HealthProstate HealthChildren's HealthConditionShop all ConditionWater RetentionAllergy & Hay Fever CareAnxiety SupportBone & Muscle HealthMuscle Support & Joint PainBrain & Memory SupportWomen's HealthMen's HealthChildren's HealthPain ReliefCold & Immune SupportFatigueDigestive HealthHair, Skin & NailsHeart & CirculationLiver CareMood SupportSexual HealthSleep & RelaxationStress ReliefVisionHerbal & Licensed RemediesShop all Herbal & Licensed RemediesValerianSt John's WortRescue RemedyAgnus CastusAshwagandhaEchinaceaMilk ThistleDevil's ClawGinseng & GuaranaBlack CohoshHomeopathic & Flower RemediesShop all Homeopathic & Flower RemediesRescue RemedyTissue SaltsFlower RemediesHomeopathic RemediesAt-Home TestsVegan Vitamins & SupplementsBuy one get one 1/2 priceSave up to 1/2 PriceBuy 1 Get 1 FreeHolland & BarrettVitabioticsSolgarNew NordicWeledaBach Original Flower RemediesBioglanBetterYouNatures AidGrass & Co.Dairy FreeGluten FreeSesame Seed FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeFish FreeKiwi FreeLupin FreeNew inFood & DrinkFood & Drink HubFood & Drink Shop AllComic ReliefEasterVegan FoodHoney, Jams & SpreadsShop all Honey, Jams & SpreadsManuka HoneyHoneyJams & ChutneysNut ButtersSpreadsPateTeas & Hot BeveragesShop all Teas & Hot BeveragesCoffee & Coffee SubstituteMushroom DrinksGreen TeaPeppermint TeaHerbal TeaFruit TeaSlimming TeaSleep & Relaxation TeaDried Fruit, Nuts & SeedsShop all Dried Fruit, Nuts & SeedsNutsDried FruitSeedsMixesSuperfoodsShop all SuperfoodsSuperfood PowdersMaca PowderGoji BerriesBaobabMoringa PowderFlaxseedSpirulinaChia SeedsSnacksShop all SnacksLow Calorie SnacksChocolate, Cakes & BiscuitsSavoury SnacksSweet SnacksSnack BarsCrisps & ChipsFlapjacksPopcornFood CupboardShop all Food CupboardHoney, Jams & SpreadsBreakfast CerealsSuperfoodsApple Cider VinegarCondiments & SaucesTinned FoodsRice, Pasta, Pulses & GrainsBreakfast CerealsShop all Breakfast CerealsCereals, Bran & FlakesGranolaMuesliOats & PorridgeBreakfast BarsDrinksShop all DrinksKombuchaNatural Energy DrinksJuicesSoft DrinksWaterAlcohol Free DrinksCookingShop all CookingCooking IngredientsApple Cider VinegarCondiments & SaucesSoya & Meat AlternativeSoup & Ready MealsRice, Pasta, Pulses & GrainsHerbs, Spices & SeasoningGravy & StockHome BakingShop all Home BakingBaking MixesBreadFlourSweeteners & Sugar AlternativesEgg SubstitutesDairy AlternativesShop all Dairy AlternativesOat, Rice & Hemp DrinksSoya DrinksNut DrinksCoconut DrinksNutritionally Complete FoodBuy one get one 1/2 priceSave up to 1/2 PriceBuy 1 Get 1 FreeHolland & BarrettNaturyaGrenadeHeath & HeatherPukkaMeridianNakdTwiningsBionaManuka DoctorGluten FreeDairy FreeEgg FreeWheat FreeMustard FreeCelery FreeCrustaceans FreeFish FreeKiwi FreeMollusc FreeNew inSports NutritionSports Nutrition HubSports Nutrition Shop AllProteinShop all ProteinClear ProteinWhey ProteinMass GainersVegan ProteinDiet ProteinCaseinBars, Drinks & SnacksShop all Bars, Drinks & SnacksEnergy BarsEnergy DrinksProtein BarsProtein ShakesProtein SnacksNutritionally Complete FoodMeal Replacement ShakesPre Workout & EnergyShop all Pre Workout & EnergyPre WorkoutAmino Energy DrinksAmino Energy PowdersIntra WorkoutKetoPost WorkoutAmino AcidsShop all Amino AcidsAmino Energy PowdersAmino Energy DrinksBCAAL-LysineGlutamineCarnitineArginineCreatineShop all CreatineCreatine PowderCreatine CapsulesSports SupplementsShop all Sports SupplementsTestosteroneSports CollagenRehydrationShop all RehydrationElectrolytesEnergy GelsVegan Sports NutritionShop all Vegan Sports NutritionVegan ProteinVegan Protein BarsVegan Pre Workout & EnergyVegan Amino AcidsVegan CreatineSports AccessoriesShop all Sports AccessoriesBottles & ShakersFitness EquipmentFitness GoalShop all Fitness GoalRecoveryMuscle & StrengthLean MuscleEnergy & EnduranceDiet & Weight LossSave up to 1/2 PriceBuy one get one 1/2 priceGreat SavingsOptimum NutritionPE NutritionUSNGrenadePhDApplied NutritionFoodspringSiSHuelPulsinDairy FreeGluten FreeSugar FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeFish FreeKiwi FreeLupin FreeNew inBeautyBeauty HubNatural Beauty Shop AllAromatherapy & HomeShop all Aromatherapy & HomePure Essential OilsBlended Essential OilsBase & Carrier OilsHolisticSkincareShop all SkincarePremium SkincareFace CareBody CareSun CareTanning & BronzingEye CareLip CareFoot CareHand & Nail CareSkin AilmentsSkin OilsCBD BeautyHair Skin & NailsWashing & BathingShop all Washing & BathingShampoo & ConditionerBathing AccessoriesShower Gel & Body WashDeodorantDentalHand WashSoapBath Soak & OilBody ScrubBath Bombs & SaltsFeminine CareIncontinence SupportHair CareShop all Hair CareShampoo & ConditionerHair ColouringHair MasksHair Oil & SerumHair Spray, Gel & MousseHair AccessoriesMother & BabyShop all Mother & BabyBaby Skincare & ToiletriesMakeupElectrical WellnessSexual WellnessBuy one get one 1/2 priceSave up to 1/2 PriceGreat SavingsDr OrganicFaith in NatureWeledaNaturtintTisserandMiaromaSukinQ+AEthiqueSo EcoAlcohol FreeParfum FreeParaben FreeSLS FreePalm Oil FreeGluten FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeNew inCBDWeight ManagementWeight Management HubWeight Management Shop AllSlimming TabletsFat Burners, Binders & Appetite SuppressantsShop all Fat Burners, Binders & Appetite SuppressantsFat BurnersFat BindersAppetite SuppressantsShakes & Weight Management ShotsShop all Shakes & Weight Management ShotsMeal Replacement ShakesWeight Management ShotsDiet ProteinDiet Food & DrinkShop all Diet Food & DrinkDiet FoodLow Calorie SnacksSlimming TeaExercise SupportShop all Exercise SupportFitness EquipmentMeal Replacement ShakesDiet ProteinProtein BarsBuy one get one 1/2 priceSave up to 1/2 PriceGreat SavingsOptimum NutritionGrenadeHolland & BarrettPulsinUSNPhDApplied NutritionEat WaterNatures AidNew NordicDairy FreeGluten FreeSugar FreeWheat FreeNew inVeganHealth & WellnessShop all Health & WellnessJoints Bones & MusclesGut HealthHair Skin & NailsStress AnxietySleep & RelaxationBuy one get one 1/2 priceSave up to 1/2 PriceGreat SavingsHolland & BarrettVitabioticsWeledaDr OrganicSolgarNew NordicNaturtintOptimum NutritionHeath & HeatherBounceDairy FreeGluten FreeParaben FreeSLS FreeAlcohol FreeParfum FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeNew inShop for your WellnessImmunityGut HealthMenopauseWomen's HealthFood & DietMuscle & Joint PainSleep & RelaxationStress ReliefHealthy HeartEnergyLow Mood & DepressionConcentration & AlertnessEye HealthSexual HealthChildren's HealthLearn about WellnessImmunityGut HealthMenopauseFood & DietJoints, Bones & MusclesSports & FitnessSleep & RelaxationHair Skin & NailsAll articlesHealthFood & nutritionGut healthImmunityJoints, bones & musclesWomen's healthWellnessHair & skinMental wellbeingSeasonalSleep & relaxationSports nutritionRecipesAll recipesGluten freeLow sugarVeganDairy freePodcast

Mass Gainers

28 items
Mass Gainers
Brand
Format
Type
Popularity
Optimum Nutrition Serious Mass Powder Vanilla 2.7kgOptimum Nutrition Serious Mass Powder Vanilla 2.7kgOptimum Nutrition Serious Mass Powder Vanilla 2.7kg
18+
Great Savings
Optimum Nutrition Serious Mass Powder Vanilla 2.7kg
4.5 (146)
£35.00
£40.00
Optimum Nutrition Serious Mass Powder Chocolate 2.7kgOptimum Nutrition Serious Mass Powder Chocolate 2.7kgOptimum Nutrition Serious Mass Powder Chocolate 2.7kg
18+
Great Savings
Optimum Nutrition Serious Mass Powder Chocolate 2.7kg
4.5 (221)
£35.00
£40.00
Optimum Nutrition Serious Mass Powder Strawberry 2.72kgOptimum Nutrition Serious Mass Powder Strawberry 2.72kgOptimum Nutrition Serious Mass Powder Strawberry 2.72kg
18+
Great Savings
Optimum Nutrition Serious Mass Powder Strawberry 2.72kg
4.5 (127)
£35.00
£40.00
USN Muscle Fuel Anabolic Strawberry 2kg
18+
USN Muscle Fuel Anabolic Strawberry 2kg
5.0 (2)
£40.00
Optimum Nutrition Serious Mass Powder Chocolate Peanut Butter 2.73kgOptimum Nutrition Serious Mass Powder Chocolate Peanut Butter 2.73kgOptimum Nutrition Serious Mass Powder Chocolate Peanut Butter 2.73kg
18+
Great Savings
Optimum Nutrition Serious Mass Powder Chocolate Peanut Butter 2.73kg
4.5 (53)
£35.00
£40.00
USN Muscle Fuel Anabolic Strawberry 4kg
18+
Great Savings
USN Muscle Fuel Anabolic Strawberry 4kg
5.0 (2)
£58.00
£70.00
New In
Optimum Nutrition Serious Mass Powder Cookies & Cream 2.7kgOptimum Nutrition Serious Mass Powder Cookies & Cream 2.7kgOptimum Nutrition Serious Mass Powder Cookies & Cream 2.7kg
18+
Great Savings
Optimum Nutrition Serious Mass Powder Cookies & Cream 2.7kg
4.0 (47)
£35.00
£40.00
Optimum Nutrition Serious Mass Powder Strawberry 5.4kgOptimum Nutrition Serious Mass Powder Strawberry 5.4kgOptimum Nutrition Serious Mass Powder Strawberry 5.4kgOptimum Nutrition Serious Mass Powder Strawberry 5.4kg
18+
Optimum Nutrition Serious Mass Powder Strawberry 5.4kg
4.5 (127)
£65.00
Optimum Nutrition Serious Mass Powder Banana 2.72kgOptimum Nutrition Serious Mass Powder Banana 2.72kgOptimum Nutrition Serious Mass Powder Banana 2.72kg
18+
Great Savings
Optimum Nutrition Serious Mass Powder Banana 2.72kg
4.5 (100)
£35.00
£40.00
USN Wholefood Gainer All-in-One Chocolate 2kg
USN Wholefood Gainer All-in-One Chocolate 2kg
£35.00
USN Muscle Fuel Anabolic Banana 4kg
18+
Great Savings
USN Muscle Fuel Anabolic Banana 4kg
£58.00
£70.00
New In
USN Muscle Fuel Anabolic Variety Pack Chocolate, Strawberry, Banana, Caramel 4kg
18+
Great Savings
USN Muscle Fuel Anabolic Variety Pack Chocolate, Strawberry, Banana, Caramel 4kg
£65.00
£70.00
New In
USN Wholefood Gainer All-in-One Vanilla 2kg
USN Wholefood Gainer All-in-One Vanilla 2kg
5.0 (1)
£35.00
USN Muscle Fuel Anabolic Chocolate 2kg
18+
USN Muscle Fuel Anabolic Chocolate 2kg
5.0 (1)
£40.00
USN Muscle Fuel Anabolic Vanilla 4Kg
18+
Great Savings
USN Muscle Fuel Anabolic Vanilla 4Kg
5.0 (1)
£58.00
£70.00
New In
USN Muscle Fuel Anabolic Chocolate 4kg
18+
Great Savings
USN Muscle Fuel Anabolic Chocolate 4kg
5.0 (1)
£58.00
£70.00
New In
Optimum Nutrition Serious Mass Powder Vanilla 5.4kgOptimum Nutrition Serious Mass Powder Vanilla 5.4kgOptimum Nutrition Serious Mass Powder Vanilla 5.4kgOptimum Nutrition Serious Mass Powder Vanilla 5.4kg
18+
Optimum Nutrition Serious Mass Powder Vanilla 5.4kg
4.5 (146)
£65.00
USN Muscle Fuel Anabolic Cookies & Cream 2kg
18+
USN Muscle Fuel Anabolic Cookies & Cream 2kg
1.0 (1)
£40.00
USN Muscle Fuel Anabolic Caramel Peanut 4kg
18+
Great Savings
USN Muscle Fuel Anabolic Caramel Peanut 4kg
£58.00
£70.00
New In
USN Muscle Fuel Anabolic Vanilla 2kg
18+
USN Muscle Fuel Anabolic Vanilla 2kg
5.0 (1)
£40.00
USN Muscle Fuel Anabolic Caramel Peanut 2kg
18+
USN Muscle Fuel Anabolic Caramel Peanut 2kg
£40.00
Optimum Nutrition Serious Mass Powder Banana 5.4kgOptimum Nutrition Serious Mass Powder Banana 5.4kgOptimum Nutrition Serious Mass Powder Banana 5.4kgOptimum Nutrition Serious Mass Powder Banana 5.4kg
18+
Optimum Nutrition Serious Mass Powder Banana 5.4kg
4.5 (100)
£65.00
USN Muscle Fuel Anabolic Banana 2kg
18+
USN Muscle Fuel Anabolic Banana 2kg
£40.00
Optimum Nutrition Serious Mass Powder Chocolate 5.4kgOptimum Nutrition Serious Mass Powder Chocolate 5.4kgOptimum Nutrition Serious Mass Powder Chocolate 5.4kgOptimum Nutrition Serious Mass Powder Chocolate 5.4kg
18+
Optimum Nutrition Serious Mass Powder Chocolate 5.4kg
4.5 (221)
£65.00
USN Muscle Fuel Anabolic Variety Pack Chocolate, Strawberry, Vanilla & Cookies 4kg
18+
Great Savings
USN Muscle Fuel Anabolic Variety Pack Chocolate, Strawberry, Vanilla & Cookies 4kg
£65.00
£70.00
New In
USN Muscle Fuel Anabolic Cookies & Cream 4kg
18+
Great Savings
USN Muscle Fuel Anabolic Cookies & Cream 4kg
1.0 (1)
£58.00
£70.00
New In
Optimum Nutrition Serious Mass Powder Cookies & Cream 5.4kgOptimum Nutrition Serious Mass Powder Cookies & Cream 5.4kgOptimum Nutrition Serious Mass Powder Cookies & Cream 5.4kgOptimum Nutrition Serious Mass Powder Cookies & Cream 5.4kg
18+
Optimum Nutrition Serious Mass Powder Cookies & Cream 5.4kg
4.0 (47)
£65.00
Optimum Nutrition Serious Mass Powder Chocolate Peanut Butter 5.45kgOptimum Nutrition Serious Mass Powder Chocolate Peanut Butter 5.45kgOptimum Nutrition Serious Mass Powder Chocolate Peanut Butter 5.45kgOptimum Nutrition Serious Mass Powder Chocolate Peanut Butter 5.45kg
18+
Optimum Nutrition Serious Mass Powder Chocolate Peanut Butter 5.45kg
4.5 (53)
£65.00

There are two main reasons why someone would want to gain mass: if they are underweight or if they want to build muscle.

 

Best weight gainer for the underweight

 

If you are very slender or even clinically underweight, you may have been advised by a doctor or nutritionist to gain weight.

 

One way of doing this is to focus on healthy foods that are also high in calories, such as full-fat dairy products, wholegrain oats, avocados, tahini and nut butters.

 

However, if your diet alone is still not helping you gain weight, it might be worth trying a weight gain supplement, also known as a weight gainer or mass gainer.

 

Weight gain supplements 

 

Most weight gain shakes and powders rely on protein. This helps to ensure that you build lean muscle mass instead of excess fat.

 

Optimum Nutrition Serious Mass provides calorie-rich whey protein that is also packed with vitamins, minerals and other great nutrients like fibre.

 

It also comes in amazing flavours such as cookies & cream and chocolate peanut!

 

When trying to gain weight, it is important that you work in weight gain supplements slowly, adding them in as extra nutrition between meals.

 

And it is also important that you keep up or else start regular exercise, otherwise the calories will be stored in your body as fat.

 

Our article, “Workout plan for gaining weight” on the Health Hub might help with ideas.

 

Muscle building & bodybuilding

 

If, rather than being underweight, you would like to build big muscle fast or just to subtly gain muscle to look your best, you might also like to try a mass gainer supplement.

 

This is because protein is the most important nutrient for building muscles.

 

For anyone serious about sculpting their body and gaining muscle, it is key to take a look at your diet and nutrition in general.

 

Pizzas and pints will have to take a back seat, especially while you are getting started.

 

But as well as making your body your temple and cutting out unhealthy foods, you will also need to up your game in terms of how much protein you are consuming.

 

Once you start your new exercise regime, you will probably need to change how often you eat – splitting three large meals into six smaller ones is often recommended by experts.

 

Then, make sure you are adding in protein to every one of those meals. Some experts recommend up to 20g per meal.

 

One of our most popular bodybuilding protein powders is USN Muscle Fuel Anabolic which calls itself the “all-in-one muscle mass catalyst”.

 

Each portion or shake contains a whopping 53g of protein. If that wasn’t enough, it also contains key vitamins and the nutrient creatine, which is another workout-supporting natural compound that helps give muscles bursts of energy.

 

USN Muscle Fuel also comes in several great flavours, including strawberry, chocolate, vanilla and caramel peanut.

 

Which is the best mass gainer?

 

The best mass gainer for you really depends on your preferences and needs.

 

Here are some key things to consider:

 

How are you going to use your protein powder?

 

If you are making it into standard shakes, you might want to look for a brand with lots of flavours so you do not get bored.

 

USN Muscle Fuel Anabolic Variety Pack has four different flavours for just this reason.  

 

What flavours do you like?

 

Some brands, such as Applied Nutrition, have branched out from the simple flavours into things like white chocolate raspberry.

 

Know why you are taking it and compare the nutritional information

 

Holland & Barrett makes this simple as we put all the ingredients and nutritional info on each product page.

 

A quick comparison of two of our most popular mass gainers shows just how different they can be.

 

For example: Applied Nutrition Critical Mass contains 42g protein and 5g creatine, with 566 kcal, 74g carbs, 2.1g saturated fat; meanwhile, Optimum Nutrition Serious Mass contains 50g protein and 1g creatine, with 1250 kcal, 250g carbs, 2g saturated fat.

 

Are you vegan or lactose intolerant?

 

If you are vegan or lactose intolerant, most of the branded mass gainers are probably not right for you as they usually contain whey powder, which is a form of dairy.

 

However, don’t worry! We have a whole page for Vegan Protein  just for you.

  • Visa
  • MasterCard
  • PayPal
  • AmericanExpress
  • ApplePay
  • ClearPay
  • AliPay
  • Instagram
  • Pinterest
  • Facebook
  • Twitter
Copyright © Holland & Barrett Retail Limited, 2023. All rights reserved. hollandandbarrett.com is a trading name of Holland & Barrett Retail Limited,. Registered office: Samuel Ryder House, Barling Way, Nuneaton, Warwickshire CV10 7RH. Registered in England: company no. 2758955. Registered VAT no. 211727395.