10 Best Diet Whey Protein in The UK

Last updated on 17/07/2025

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Serious Shredz 4kg – Diet Whey Protein Powder – Contains L-Carnitine L-Tartrate and Green Tea Extract – Supports Lean Muscle Growth, 133 Servings – The Bulk Protein Company (Salted Caramel)

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Why We Love It

Affordable, high-quality protein supplement.
Delicious, convenient meal replacement.
Low-carb, fiber-rich ingredients.

Main Highlights

✅ SERIOUS SHREDZ – Here at The Bulk Protein Company we're serious about value. We're serious about creating the UK's number 1, lean diet protein powder at a fair and affordable price
✅ PROTEIN & SERVINGS – 21g of high-quality protein in every scoop & a huge 133 Servings per 4kg tub!.
✅ INGREDIENTS – SOY Protein Isolate, Glutamine Peptides (WHEAT), Chicory insulin, Maltodextrin, MILK protein concentrate (MILK), Flavoring, Green Tea Extract, MCT Oil Powder, Salt, L-Carnitine, L-Tartrate, Sweetner (Sucrolose) | For Allergens please ingredients in CAPITALS. May contain MILK, EGG, GLUTEN, SOYA, NUTS and PEANUTS
✅ TASTE – Serious Shredz is delicious and makes for a tasty any time of the day meal replacement or diet friendly post workout recovery shake. If you're serious about training, Serious Shredz is for you
✅ PREP – For best results consume 1 serving (30g) one to three times per day. Simply add 1 rounded scoop (30g) to 250ml of cold water or skimmed milk, shake well and enjoy

PhD Nutrition Diet Whey Low Calorie Protein Powder, Low Carb, High Protein Lean Matrix, Vanilla Crème Diet Whey Protein Powder, High Protein, 62 Servings Per 2 kg Bag [Packaging May Vary]

16% Off

Why We Love It

Optimizes muscle-building and fat loss.
Promotes extended protein absorption.
Supports environmental sustainability.

Main Highlights

INFORMED PROTEIN Certified: Independently verified by Informed Protein for accurate protein content and quality. Trusted by athletes and tested to the highest standards for peace of mind
HIGH PROTEIN, Low Calorie: Now with 20g of high-quality protein per serving to support muscle maintenance in a calorie deficit. Only 125 calories and less than 5g of carbs per serving – ideal for lean muscle goals
FAT-LOSS SUPPORT Blend: Contains CLA, L-carnitine, green tea extract and flaxseed – active ingredients to support fat metabolism and maintain muscle
SATISFYING & EASY to MIX: Smooth texture, easy to shake, and satisfying taste. Helps curb hunger between meals and keeps you feeling fuller for longer throughout the day
SUSTAINABLE PACKAGING: Comes in 100% recyclable packaging – a smart choice for both your fitness goals and the environment

Applied Nutrition Critical Whey Protein Powder 2kg - High Protein Powder, Protein Milkshake, Muscle Building Supplement with BCAAs & Glutamine (2kg - 67 Servings) (Vanilla Ice Cream)

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Why We Love It

Promotes muscle building and maintenance.
Prepares quickly for convenience.
Offers variety in flavours.

Main Highlights

BUILD & MAINTAIN MUSCLE: Applied Nutrition protein powder is an excellent way to build up your muscles when you do strength training. Protein is an essential part of your diet to help maintain muscle mass, so drinking the shake as recommended will help you to retain your muscle development.
EASY TO PREPARE: This high protein powder mixes incredibly well with water or low-fat milk. You can shake it up when you are running late or on the go in no time.
TESTED FOR ATHLETES: Every ingredient within this product is carefully selected and monitored through our quality management system to bring you the highest level of assurance. Final products are produced and packaged in an ISO 22000, BRC, GMP and Halal accredited laboratory.
VARIETY OF FANTASTIC FLAVOURS: You can pick from multiple available flavours for your protein milkshake. Never again will you have to drink tasteless protein supplements.
GREAT SOURCE OF PROTEIN: Applied Nutrition Critical Whey powder is a wonderful source of protein. The combination of Whey Protein Concentrate, Whey Protein Isolate and Hydrolysed Whey Protein makes the perfect muscle building supplement.

PhD Nutrition Diet Whey Lean Protein Powder | Belgian Chocolate Whey Protein Powder | 1kg Bag [ Packaging May Vary ]

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Why We Love It

Supports comprehensive fitness and diet.
Promotes lean muscle maintenance.
Eco-friendly, recyclable packaging.

Main Highlights

Comprehensive Fitness Support: PhD Diet Whey is a perfect blend of proteins and fat-burning ingredients; ideal for building and maintaining lean muscle whilst keeping you satiated for longer
Enhanced Fat Loss: Contains flaxseeds, CLA, L-carnitine, and green tea extract; ideal for those striving to keep body fat low while building or preserving lean muscle mass
Eco-friendly packaging: Opting for PhD Diet Whey is a step towards environmental sustainability as it comes in 100% recyclable packaging
Versatile: The PhD Whey Protein Powder can be consumed at any time and is particularly favored in smoothies; helps curb hunger cravings as it offers feelings of satiety in between meals.

PhD Nutrition Diet Whey High Protein Lean Matrix, Raspberry and White Chocolate Diet Whey Protein Powder, 16g of Protein, 40 Servings Per 1 kg Bag

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Why We Love It

Supports comprehensive fitness and diet.
Offers high-quality, macro-friendly protein.
Eco-friendly and versatile usage.

Main Highlights

INFORMED PROTEIN Certified: Independently verified by Informed Protein for accurate protein content and quality. Trusted by athletes and tested to the highest standards for peace of mind
HIGH PROTEIN, Low Calorie: Now with 20g of high-quality protein per serving to support muscle maintenance in a calorie deficit. Only 125 calories and less than 5g of carbs per serving – ideal for lean muscle goals
FAT-LOSS SUPPORT Blend: Contains CLA, L-carnitine, green tea extract and flaxseed – active ingredients to support fat metabolism and maintain muscle
SATISFYING & EASY to MIX: Smooth texture, easy to shake, and satisfying taste. Helps curb hunger between meals and keeps you feeling fuller for longer throughout the day
SUSTAINABLE PACKAGING: Comes in 100% recyclable packaging – a smart choice for both your fitness goals and the environment

Applied Nutrition Diet Whey 1kg Bundle - Diet Whey High Protein Powder + 5 Sample Bundle + 750ml Steel Protein Shaker | Low Carb & Sugar, Weight Management Shake, 40 Servings (Vanilla)

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Why We Love It

High protein blend powers workouts.
Low carbs aid weight management.
Variety of delicious flavours.

Main Highlights

HIGH PROTEIN BLEND: Applied Nutrition’s Diet Whey Protein Powder combines CLA, L-Carnitine, Green Tea, Whey Protein Isolate and Whey Protein Concentrate. This creates a high protein blend to keep you going throughout the day and power up your workouts. On this bundle you will get your Diet Whey 1kg bag + 5 sample bundle + 750ml Steel Protein Shaker. Please note that the samples may vary.
LOW CARBS & SUGAR: Diet Whey is one of the most advanced weight management supplements on the market. Using Applied Nutrition’s weight loss protein powder to compliment a healthy diet and regular exercise simplifies the weight management process and helps your body to perform optimally.
CHOICE OF DELICIOUS FLAVOURS: Protein powder does not have to be tasteless. Applied Nutrition offer 4 different scrumptious flavours to choose from: banana milkshake, chocolate dessert, strawberry milkshake or vanilla ice cream. Order a few different flavours to add variety into your routine.
EASY TO PREPARE: Whey protein powder is incredibly easy to prepare. This is ideal if you are on the go or in a hurry in the mornings. Simply add a scoop to cold water and shake to mix well.
TESTED FOR ATHLETES: Applied Nutrition’s protein supplements are tested in their in-house research and development facility. This ensures that they meet the exacting testing standards for professional athletes, giving you the highest level of assurance in this protein powder.

PhD Nutrition Diet Whey High Protein Lean Matrix, Chocolate Orange Diet Protein Powder, 16g of Protein, 40 Servings Per 1 kg Bag

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Why We Love It

Supports comprehensive fitness and fat loss.
High-quality protein boosts muscle growth.
Eco-friendly and versatile consumption.

Main Highlights

Comprehensive Fitness Support: PhD Diet Whey is a perfect blend of proteins and fat-burning ingredients; ideal for building and maintaining lean muscle whilst keeping you satiated for longer High-Quality Protein Content: 16g of protein per serving from diverse sources offer a drip feed effect of essential amino acids; Macro-friendly with less than 3g carbs and 100 calories per serving. Enhanced Fat Loss: Contains flaxseeds, CLA, L-carnitine, and green tea extract; ideal for those striving to keep body fat low while building or preserving lean muscle mass Eco-friendly packaging: Opting for PhD Diet Whey is a step towards environmental sustainability as it comes in
100% recyclable packaging Versatile: The PhD Whey Protein Powder can be consumed at any time and is particularly favored in smoothies; helps curb hunger cravings as it offers feelings of satiety in between meals.
PHO Nutrition Ltd. 35 Churchill Way, Nelson, Lancashire BB9 6RT UK

Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Extreme Milk Chocolate Flavour, 28 Servings, 896 g

25% OffFree Shipping

Why We Love It

Supports muscle gain and recovery.
Low in sugar and fat.
Variety of flavors available.

Main Highlights

Optimum Nutrition’s Gold Standard 100% WHEY is the world’s best-selling protein powder* designed to support your fitness journey from day one
FAST-ABSORBING whey protein with whey protein isolate as the main ingredient helps with muscle gain and supports recovery* after every training session
The ON whey protein formula is Informed Choice certified, contains naturally-occurring BCAAs and GLUTAMINE and is LOW IN SUGAR and fat
Available in a VARIETY OF SIZES and FLAVOURS: double rich chocolate, banana cream, vanilla ice cream, unflavored protein powder and more
EASY & CONVENIENT: mix one scoop in 180-240 ml of cold water; best enjoyed in the morning or/and during the 30 minutes just before or immediately after training

PhD Nutrition Diet Whey Low Calorie Protein Powder, Low Carb, High Protein Lean Matrix, Chocolate Peanut Butter Protein Powder, High Protein, 40 Servings Per 1 kg Bag

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Why We Love It

Promotes lean muscle development.
Boosts fat loss efficiency.
Satisfies hunger effectively.

Main Highlights

INFORMED PROTEIN Certified: Independently verified by Informed Protein for accurate protein content and quality. Trusted by athletes and tested to the highest standards for peace of mind
HIGH PROTEIN, Low Calorie: Now with 20g of high-quality protein per serving to support muscle maintenance in a calorie deficit. Only 125 calories and less than 5g of carbs per serving – ideal for lean muscle goals
FAT-LOSS SUPPORT Blend: Contains CLA, L-carnitine, green tea extract and flaxseed – active ingredients to support fat metabolism and maintain muscle
SATISFYING & EASY to MIX: Smooth texture, easy to shake, and satisfying taste. Helps curb hunger between meals and keeps you feeling fuller for longer throughout the day
SUSTAINABLE PACKAGING: Comes in 100% recyclable packaging – a smart choice for both your fitness goals and the environment

Premium Body Nutrition

PBN - Premium Body Nutrition Diet Whey Vanilla 1kg Pouch

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Why We Love It

Boosts growth in muscle mass.
Maintains normal bone health.
Based on EU Commission Regulation.

Main Highlights

Protein contributes to growth in muscle mass(1) and to the maintenance of normal bones.(2)
1-Protein contributes to a growth in muscle mass
2-Protein contributes to the maintenance of normal bones
Source: Official Journal of the European Union - COMMISSION REGULATION (EU) No 432/2012 of 16 May 2012 establishing a list of permitted health claims made on foods, other than those referring to the reduction of disease risk and to children’s development and health

8.9

Excellent

We scanned 1115 products

We reviewed these offers relevant to the Diet Whey Protein 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 The Bulk Protein Company, PhD, Applied Nutrition, Optimum Nutrition, Premium Body Nutrition, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Diet Whey Protein in the market, we considered we took a deep dive into 5576 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 Serious Shredz 4kg – Diet Whey Protein Powder – Contains L-Carnitine L-Tartrate and Green Tea Extract – Supports Lean Muscle Growth, 133 Servings – The Bulk Protein Company (Salted Caramel). We love many things about this product by The Bulk Protein Company. What sets it apart from the competition is Affordable, high-quality protein supplement, Delicious, convenient meal replacement, Low-carb, fiber-rich ingredients.
The best value product for most shoppers and where user satisfaction is continuously the highest is PhD Nutrition Diet Whey Low Calorie Protein Powder, Low Carb, High Protein Lean Matrix, Vanilla Crème Diet Whey Protein Powder, High Protein, 62 Servings Per 2 kg Bag [Packaging May Vary] by PhD based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Diet Whey Protein and the best cost-to-value ratio is Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Extreme Milk Chocolate Flavour, 28 Servings, 896 gat Optimum Nutrition with a 25% discount.
Our list of the best Diet Whey Protein 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 Diet Whey Protein in The UK

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We scanned 1115 products

We concluded that: