10 Best High Calorie Protein Shake in The UK

Last updated on 04/07/2025

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Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 16 Servings, 5.45 kg, Packaging May Vary

Why We Love It

Supports muscle growth and performance.
Healthy, low-fat, high-calorie content.
Six tasty, varied flavors.

Main Highlights

Low fat mass gainer with over 1250 CALORIES and 50g of PROTEIN per serving to support muscle growth* plus 3 grams of CREATINE MONOHYDRATE to support performance**
No added sugar protein powder formula with 25 vitamins and minerals and less than 5g fat per serving, plus over 250 grams of CARBOHYDRATES helping support muscle recovery***
Serious Mass protein powder comes in 6 flavours (banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla) & contains sweetener
To prepare weight gainer mix 2 scoops with 710 ml of water or plant milk, add fruit or nut butters for a tasty and calorific post workout or between meals protein smoothie
Source EFSA Journal *2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; ***2011; 9(7):2303

USN Hyperbolic Mass Strawberry Cheesecake 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar

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Why We Love It

Uncompromised taste with muscle mass.
High calorie for quick results.
Nutrition-rich performance booster.

Main Highlights

Our best mass gainer yet: Our best-tasting mass gainer is for those who want to increase their muscle mass, but don't want to compromise on the taste of their protein drink.
High calorie bulk powder: With up to 1183 calories our all-in-one mass and weight gainer is ideal for individuals who struggle to gain muscle mass and want a fast-acting, easy-mixing and effective formula.
Amazing taste, great results: The improved formula of our delicious strawberry flavour mass gainer provides a greater post-workout effectiveness, with a smoother taste - all delivered with less Sugar.
A weight gainer with nutrition: Our mass protein powder contains a massive 60g of protein per serving, partnered with 7.5g of Creatine and 18 vitamins and minerals (B12, B6, C, Magnesium, Iron) to help you be at your best.
For best results: To get the best results from Hyperbolic Mass, take 1 servings daily, either after training or as a snack between meals. Simply mix 4 scoops (300g) of the protein powder with 900ml of cold water and enjoy.

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 8 Servings, 2.73 kg, Packaging May Vary

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Why We Love It

Supports muscle growth and performance.
Promotes recovery with carbohydrates.
Offers tasty, diverse flavor options.

Main Highlights

Low fat mass gainer with over 1250 CALORIES and 50g of PROTEIN per serving to support muscle growth* plus 3 grams of CREATINE MONOHYDRATE to support performance**
No added sugar protein powder formula with 25 vitamins and minerals and less than 5g fat per serving, plus over 250 grams of CARBOHYDRATES helping support muscle recovery***
Serious Mass protein powder comes in 6 flavours (banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla) & contains sweetener
To prepare weight gainer mix 2 scoops with 710 ml of water or plant milk, add fruit or nut butters for a tasty and calorific post workout or between meals protein smoothie
Source EFSA Journal *2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; ***2011; 9(7):2303

The Bulk Protein Company

The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Vanilla, 5kg)

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Why We Love It

Builds muscle with 30g protein.
Aids weight gain effectively.
Offers great taste choices.

Main Highlights

26G PROTEIN PER SERVING TO HELP BUILD MUSCLE - A convenient and easy way to help you meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, which speeds up recovery, reduces muscle soreness, and leads to stronger and bigger muscles over time.
PUT ON SIZE AND GAIN MASS - With 464 lean calories per serving, Serious Gainz protein powder is ideal when BULKING. Use as part of a balanced diet to help add body mass and increase weight gain. Contains 77g of carbohydrates which will help your body absorb the protein within, turning it into muscle mass to help improve your overall body composition.
PROTEIN SHAKE THAT TASTES GREAT - Add 3 scoops of powder to 400-500ml of water or milk and mix well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. Protein powders don't have to be boring, so we made 10 different flavours for you to choose from.
HIGH QUALITY WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs). One of these BCAAs, Leucine, plays a major role in promoting muscle growth and recovery after resistance and endurance exercise. When amino acids are digested and absorbed into your bloodstream, they become available for muscle protein synthesis, which is the creation of new muscle.
EXCELLENT VALUE 5kg TUB WITH 40 SERVINGS - With up to a month's supply of high quality protein powder, we offer great value for your money compared with other brands. We recommend one serving per day to consistently meet your daily protein goal. Consume immediately post-training on workout days and between breakfast and lunch on non-workout days. Comes with scooper for measurements.

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection, 2 kg)

Why We Love It

Promotes muscle maintenance overnight.
Guarantees premium quality ingredients.
Suitable for various dietary needs.

Main Highlights

Engineered for Gains: This seamless protein shake mix is specifically formulated to accelerate muscle and weight gains and improve post-workout recovery, enhancing overall workout performance for the dedicated, hard gainer and serious athlete alike
Excellent Nutrition Profile: Packed with quality ingredients, each protein shake serving delivers over 1000 kcals, 200g of complex carbohydrates, 60g of muscle gain protein, critical EAAs, creatine, 18 vitamins and minerals (B12, B6, C, Iron, Zinc)
Outstanding Taste Sensation: Our Chocolate Perfection mass gainer flavour isn't just a treat for your taste buds - it's a deliciously creamy escape into indulgence with every sip, all while you are fueling your body for mass gain and muscle recovery
Optimal Timing for Maximum Impact: Consume Instant Mass Heavyweight high protein shake between meals for a positive nitrogen balance, 20-30 minutes post workout for best results or 45-60 minutes before sleep to aid overnight muscle maintenance
Trusted Quality Assurance: Reflex Nutrition's promise to quality means whey protein powder from grass-fed cows - Protein Sources are Glutamine Peptides, Whey Protein Concentrate, Milk Protein, Hydrolysed Whey Protein
Produced in an Informed Sport Registered Facility - Suitable for vegetarians and Halal certified - Zero added sugars, artificial colors, or soy protein, assuring a conscientious choice of weight gainer for your muscle-building objectives

Warrior Whey Protein Powder – Up to 36g* of Protein Per Shake – Low Sugar, and Low Carbs – GMP Certified (Double Chocolate, 1kg)

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Why We Love It

High protein for muscle growth.
Low carb, minimal sugar.
Versatile usage for goals.

Main Highlights

36g PROTEIN PER 50g SERVING TO HELP BUILD MUSCLE - Use after training to quickly heal micro-tears in muscle tissues, speed up recovery, and reduce muscle soreness for STRONGER and BIGGER muscles over time.
LOW CARB & LOW IN SUGAR - Warrior Whey is HIGH in protein but low in Carbohydrates, Fats, and Sugar. Ideal to use as a meal replacement as part of a calorie-controlled diet while trying to lean out, and Ideal for those simply looking to BUILD MUSCLE and BURN FAT at the same time.
USE ANY DAY FOR DIFFERENT GOALS - Portion size can be increased or decreased depending on your training goals. For LEANING OUT, use 1 scoop mixed with 200ml water to create a low-carb Protein Shake. For LEAN GAINS, use 2 scoops instead.
WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs) which play a major role in promoting MUSCLE GROWTH and RECOVERY after resistance and endurance exercise. BCAAs are the building blocks for muscle protein synthesis, which is the creation of new muscle.
PROTEIN SHAKE THAT TASTES GREAT - Available in super tasty flavours: Double Chocolate, Strawberry crème, Vanilla Ice Cream, White Chocolate, Coconut, Salted Caramel, and Unflavoured Unlike other bland protein shakes, ours taste DELICIOUS Can also be added to smoothies, oats, or pancake mix to create high-protein meals.

USN Diet Fuel Ultralean Meal Replacement Shake Powder, Strawberry Flavour - 1kg, High Protein Shake Powdered Drink Mix, Low Calorie Diet & Weight Control Powder, 25g Protein

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Why We Love It

Supports healthy, sustainable weight loss.
Maintains normal blood sugar.
Convenient for on-the-go.

Main Highlights

USN Protein powder drink mix: High protein meal replacement shake powder to help support your weight loss goals. With added vitamins, each tasty diet shake you make can help you feel full for longer
Premium women's and men's supplements: USN diet supplements offer proven benefits, when taken alongside a balanced diet and healthy lifestyle. Always consult a healthcare professional first
USN meal replacement shakes: A tasty USN meal replacement beverage powder with 25g protein and under 210 calories. High fibre with essential vitamins and nutrients - simply add 2 scoops to cold water
Achieve your aims: 1kg of great tasting Strawberry flavour powdered protein, that can also be made up as a snack between meals, to help hit your daily protein goals and reduce sweet cravings
Ultimate Sports Nutrition: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout

UFIT High 50g Protein Shake - Banana Flavour - No Added Sugar - Low in Fat - Ready to Drink - Pack of 8 x 500 ml (Packaging May Vary)

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Why We Love It

High protein content boosts nutrition.
Low-fat and zero added sugars.
Boosts immunity with essential vitamins.

Main Highlights

No added sugar & fat free - Ufit contains no added sugar and is also fat free making it one super healthy shake
Directions: drink chilled, shake well
Added vitamins and minerals - Ufit contains essential vitamins and minerals that help keep immune system fighting fit

Huel Ready-to-Drink Meal, Chocolate Protein Drink, 8 x 500ml Bottles, Protein Shakes, Pre-Portioned Meal, 20g of Protein per Bottle, Rich in Essential Vitamins, Minerals, Meal Replacement Shake

6% OffFree Shipping

Why We Love It

Ready-to-drink complete meal.
Convenient and time-saving.
Packed with essential nutrients.

Main Highlights

COMPLETE MEAL IN A BOTTLE: Each bottle delivers up to 20g of plant-based protein, 26 essential vitamins and minerals, and a perfect blend of carbs, fats, and fibre to keep you energized throughout the day.
SMOOTH, CREAMY & ON-THE-GO CONVENIENCE: Pre-portioned and ready to sip, this meal drink is smooth and satisfying. Simply shake and enjoy—ideal for quick breakfasts, work lunches, or fueling up between meetings.
NUTRIENT-RICH INGREDIENTS: Made with oats, pea protein, flaxseed, and tapioca, this meal shake is packed with calcium, potassium, fibre, and healthy fats to support digestion, metabolism, and sustained energy.
SCIENCE-BACKED HEALTH BENEFITS: Delivers over 170 research-backed health benefits to support everyday wellness. Made with nutrients that support muscle function, reduce tiredness and fatigue, contribute to immunity, and maintain healthy skin, hair, and nails
100% VEGAN & GLUTEN-FREE: Plant-based, non-GMO, and free from artificial flavourings, colourings, and preservatives. Huel Ready-to-drink provides clean, sustainable nutrition that tastes great and fits your lifestyle.

UFIT High 50g Protein Shake - Chocolate Flavour - No Added Sugar - Low in Fat - Ready to Drink -Pack of 8 x 500 ml (Packaging May Vary)

Why We Love It

High quality protein content.
No added sugar.
Enhanced with essential vitamins.

Main Highlights

No added sugar & fat free - Ufit contains no added sugar and is also fat free making it one super healthy shake

8.7

Excellent

We scanned 928 products

We reviewed these offers relevant to the High Calorie Protein Shake within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Optimum Nutrition, USN, The Bulk Protein Company, Reflex, Warrior, UFIT, Huel, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best High Calorie Protein Shake in the market, we considered we took a deep dive into 4641 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 16 Servings, 5.45 kg, Packaging May Vary. We love many things about this product by Optimum Nutrition. What sets it apart from the competition is Supports muscle growth and performance, Healthy, low-fat, high-calorie content, Six tasty, varied flavors.
The best value product for most shoppers and where user satisfaction is continuously the highest is USN Hyperbolic Mass Strawberry Cheesecake 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar by USN based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for High Calorie Protein Shake and the best cost-to-value ratio is USN Diet Fuel Ultralean Meal Replacement Shake Powder, Strawberry Flavour - 1kg, High Protein Shake Powdered Drink Mix, Low Calorie Diet & Weight Control Powder, 25g Proteinat USN with a 23% discount.
Our list of the best High Calorie Protein Shake is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best High Calorie Protein Shake in The UK

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We scanned 928 products

We concluded that: