10 Best Gold Standard Isolated Whey Protein in The UK

Last updated on 19/08/2025

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Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder with Naturally Occurring Glutamine and BCAA Amino Acids, Double Rich Chocolate Flavour, 146 Servings, 4.53 kg

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Why We Love It

Boosts fitness journey from start.
Helps muscle gain and recovery.
Variety of sizes and flavors.

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
*Source: Euromonitor International Limited; Consumer Health 2023 edition, Sports Protein Powder category, % retail value shares, 2022 data
** Source EFSA Journal 2010;8(10):1811; 2011;9(6):2203

Dymatize ISO 100 Hydrolyzed Gourmet Vanilla 2264g - Whey Protein Hydrolysat + Isolat Pulver

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Why We Love It

Easy to digest formula.
Promotes muscle protein synthesis.
Suitable for vegetarians.

Main Highlights

THE TOP-QUALITY RECIPE of our whey isolate protein powder delivers 25 g of the highest-quality protein per serving with BCAAs and L-leucine, making it both gluten free and suitable for vegetarians
HYDROLYSIS breaks the whey protein isolate into smaller amino acid chains, which makes it exceptionally quick to absorb and the perfect choice before or after training
THE FAT AND SUGAR-FREE protein powder contains less than 116 calories per serving (mixed with water), making it perfect for athletes who are optimising both their protein and calorie intakes
ACCORDING TO INFORMED CHOICE, every substance in the iso whey protein powder is of the highest standard, so athletes can rest easy knowing their product is top quality, especially during competitions
WINNER OF the isolate of the year award from 2013 to 2017, our ISO 100 premium protein powder meets the highest quality standards and is the perfect protein supplement before and after training

Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Double Rich Chocolate Flavour, 73 Servings, 2.26 kg

15% OffFree Shipping

Why We Love It

Supports fitness journey from start.
Assists in muscle gain, recovery.
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
*Source: Euromonitor International Limited; Consumer Health 2023 edition, Sports Protein Powder category, % retail value shares, 2022 data
** Source EFSA Journal 2010;8(10):1811; 2011;9(6):2203

Optimum Nutrition Platinum Hydro Whey, Hydrolysed Whey Protein Isolate Powder with Essential Amino Acids, Glutamine and BCAA, Vanilla Bean Flavour, 40 Servings, 1.6 kg

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Why We Love It

Optimized for intensive workouts.
Offers high protein content.
Easy preparation, great taste.

Main Highlights

Pure hydrolysed whey protein isolate powder designed to support your strength training, CrossFit routine, gym workout, and fitness sessions
Each serving contains 30 g of the FASTEST DIGESTING PROTEIN for the growth and maintenance of muscle mass*
Carefully formulated with 9.5 g of both naturally occurring BCAAs and added amino acids
Hydrolysed whey protein isolates deliver the PUREST FORM OF WHEY PROTEIN with minimal amounts of fat and sugars; ONLY 1 g OF SUGARS OR LESS and no more than 0.5 g of fat per serving
An EASY TO MIX, the any-time protein formula that provides an extra source of protein throughout the day, in three varieties: Milk Chocolate, Super Strawberry, and Vanilla Bean
For a tasty protein shake add 1 scoop of the whey isolate to 260 ml of water and shake, stir, or blend well
*Source: Official Journal of the European Union - COMMISSION REGULATION (EU) No 432/2012

Per4m Isolate Zero Premium Whey Protein Powder | 66 Servings Ultra Filtered Isolate Shake + Amino Acids | Muscle Recovery & Optimal Nutrition | Zero Sugar & Low Gluten (2kg, Dubai Chocolate)

Why We Love It

High-quality whey protein isolate.
Supports lean muscle growth.
Delicious flavors for everyone.

Main Highlights

✅ per4m Isolate Zero 100% Premium Whey Protein Isolate Powder Shake with Amino Acids, Zero Sugar & Naturally Low in Gluten
✅ 26g of highly Bio-Available Protein per serving to help support your lean muscle growth and Optimal Nutrition when Training
✅ Ultra-Filtered Whey Protein Isolate, made using the highest quality whey from EU grass-fed dairy sources
✅ Rich in Whey Protein Peptide Fractions such as Lactoferrin and Glycomacropetides with Branched Chain Amino Acids (BCAAs)
✅ Sugar-Free, Naturally Low in Gluten and from EU Grass Fed Dairy
✅ With Branched Chain Amino Acids (BCAAs) and No Sugar
✅ 14 Delicious Flavours in easy-store tubs of 900g & 2kg

MuscleTech NitroTech 100% Whey Gold Protein Powder, Build Muscle Mass, Whey Isolate Protein Powder & Peptides, Protein Shake For Men & Women, 5.5g BCAA, 71 Servings, 2.27kg, French Vanilla Cream

Why We Love It

Scientifically developed ultra-pure formula.
Rapid absorption aids digestion.
Best-in-class Whey Protein.

Main Highlights

PREMIUM PROTEIN WITH WHEY ISOLATE - Nitro-Tech 100 percent whey gold delivers premium 100 percent whey protein, including at least 5.5 grams of BCAAs and 4.3 grams of glutamine per serving from whey
OUR BEST-IN-CLASS WHEY PROTEIN - This scientifically developed formula is ultra-pure, rapidly absorbed and quickly digested
COLD-FILTERED MICRONISATION - Cold filtered, multi-phase filtration reduces fat, lactose and impurities without using heat, harsh acids or salt
HELPS BUILD MUSCLE AND ENHANCE RECOVERY - Take it before or after workouts to enhance lean muscle and support muscle recovery for men and women
FLAVOUR SATISFACTION - For years, the MuscleTech brand has partnered with the world's top flavour houses to deliver a delightful taste experience

Reflex Nutrition Isolate Pro - 83% Premium Protein from Whey Isolate Protein Powder - Fast Absorption, Low Lactose, Low Fat, Low Sugar Protein Shake - Muscle Gain (Vanilla, 1.8kg, 60 Servings)

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Why We Love It

High protein without extra calories.
Optimal for muscle gain.
Effortlessly blends into shakes.

Main Highlights

Premium Protein Excellence: Reflex Isolate Pro is made from whey isolate stripped of most fats and carbs, ensuring high protein purity - Ideal for increasing protein intake without extra calories and suitable for those with lactose intolerance
Optimal Nutritional Values: Each 30g scoop of whey protein isolate provides 25g of protein, Less than 0.5g of fat and Less than 0.5g of carbs - The ideal choice for those seeking muscle gain and lean mass maintenance with minimal calorie intake (103 kcal per serving)
Effortless Mixing: This whey protein powder blends smoothly into water or milk for silky protein shakes and can be easily incorporated into various culinary creations, serving as a post workout muscle growth aid or a healthy protein snack
Optimised for Rapid Recovery: Reflex grass fed whey protein powder is ultra-filtered for fast absorption, making it as a post workout protein snack - With whey protein isolate, it's the highest purity whey to maximise muscle growth
Manufactured in an informed sport registered facility: Reflex Isolate Pro whey protein supplement is vegetarian-friendly, Halal-certified, free from hormones, and with no added sugars, artificial colours or soy protein - Contains soy derivatives

Dymatize Elite 100% Whey Rich Chocolate 2170g - High Protein Low Sugar Pulver + Whey Protein und BCAAs

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Why We Love It

Supports muscle growth effectively.
Low in sugars, high-quality.
Suitable for vegetarians, gluten-free.

Main Highlights

THE PERFECT PROTEIN any time of the day – Elite 100% Whey contains 25 g of protein per serving and is ideal before and after training for athletes of all levels
THE ESSENTIAL AMINO ACIDS IN WHEY PROTEIN support strength building and muscle maintenance – one serving of Elite Whey provides around 6 g of BCAAs as well as the key amino acids L-valine, L-leucine and L-isoleucine
THE LOW-SUGAR PROTEIN POWDER is ideal for athletes who are watching both their protein and calorie intake – it is also gluten free and vegetarian, as 100% of its milk protein is from whey protein
ACCORDING TO INFORMED CHOICE, every substance in the Elite whey protein powder is of the highest standard, so athletes can rest easy knowing their product is top quality, especially during competitions
ELITE GOURMET WHEY is best taken 1–2 times per day immediately after training or between meals – the powder dissolves well even in water, saving you calories

Weider Isolate Whey 100 CFM (908g) Strawberry Ice Cream Flavour. Protein Powder with 25g Proteins and 5g BCAAs per Serving. Low Sugar. Aspartame-Free.

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Why We Love It

Promotes purity with 100% Whey.
Supports digestion with Digezyme.
Grass-fed, Zero sugar product.

Main Highlights

100 Percent isolated whey protein with maximum purity
Enriched with digestive enzymes (Digezyme)
High quality raw material (Isolac)
Made from milk from cows that feed on pastures (Grass-Fed)
Zero sugar, zero aspartame and low fat content

MuscleTech NitroTech Whey Protein Powder, Muscle Maintenance & Growth, Whey Isolate Protein Powder With 3g Creatine, Protein Shake For Men & Women, 6.8g BCAA, 40 Servings, 1.8g, Vanilla Cream

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Why We Love It

Boosts physical performance effectively.
Contains tested creatine monohydrate.
Includes abundant glutamine and BCAA.

Main Highlights

MUSCLETECH NITRO-TECH – MuscleTech brings you Nitro-Tech, the most powerful protein formula ever developed, each serving contains 30g of premium whey protein, 7.1g of BCAA and 5.5g of glutamine and precursor (naturally-occurring)
BETTER PERFORMANCE – Includes 5.5 g of glutamine and precursor, 7.1g BCAA, and a 3 g dose of HPLC-Tested creatine monohydrate, which has been shown to increase physical performance in successive bursts of short-term, high intensity exercise
TASTES GREAT AND MIXES EASILY – No chalky texture and no aftertaste, available in 4 great milkshake flavours, every flavour of Nitro-Tech won in head-to-head, third-party taste tests against leading competitors - mixes easily with cold water or milk in a shaker cup or glass
ABSORBS FAST and DIGESTS EASY – Whey peptides are an ultra-pure, rapidly absorbed, and quickly digested whey protein powder that contributes to the maintenance and growth in muscle mass
USE BETWEEN MEALS OR AFTER EXERCISE – Use between major meals or post-workout - clean ingredients that work well in smoothies

8.7

Excellent

We scanned 878 products

We reviewed these offers relevant to the Gold Standard Isolated 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 Optimum Nutrition, Dymatize, per4m, Muscletech, Reflex, Weider, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Gold Standard Isolated Whey Protein in the market, we considered we took a deep dive into 4391 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 Gold Standard 100% Whey Muscle Building and Recovery Protein Powder with Naturally Occurring Glutamine and BCAA Amino Acids, Double Rich Chocolate Flavour, 146 Servings, 4.53 kg. We love many things about this product by Optimum Nutrition. What sets it apart from the competition is Boosts fitness journey from start, Helps muscle gain and recovery, Variety of sizes and flavors.
The best value product for most shoppers and where user satisfaction is continuously the highest is Dymatize ISO 100 Hydrolyzed Gourmet Vanilla 2264g - Whey Protein Hydrolysat + Isolat Pulver by Dymatize based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Gold Standard Isolated Whey Protein and the best cost-to-value ratio is Reflex Nutrition Isolate Pro - 83% Premium Protein from Whey Isolate Protein Powder - Fast Absorption, Low Lactose, Low Fat, Low Sugar Protein Shake - Muscle Gain (Vanilla, 1.8kg, 60 Servings)at Reflex with a 25% discount.
Our list of the best Gold Standard Isolated 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 Gold Standard Isolated Whey Protein in The UK

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Optimum Nutrition ON Gold Standard 100% Isolate Pure Whey Protein, Naturally Occurring BCAAs and Glutamine, Pre and Post Workout, Chocolate Flavour, 31 Servings, 930 g

Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Double Rich Chocolate Flavour, 15 Servings, 465 g

Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Unflavoured, 30 Servings, 900 g

Optimum Nutrition Gold Standard 100 Percent Whey Muscle Building and Recovery Protein Powder with Naturally Occurring Glutamine and BCAA Amino Acids, Double Rich Chocolate Flavour, 10 Servings, 310 g

Optimum Nutrition Gold Standard 100 Percent Whey Muscle Building and Recovery Protein Powder with Naturally Occurring Glutamine and BCAA Amino Acids, Strawberry and Vanilla Ice Cream Flavor

Optimum Nutrition Gold Standard 100 Percent Whey Muscle Building and Recovery Protein Powder with Naturally Occurring Glutamine and BCAA Amino Acids Double Rich Chocolate Flavour and Strawberry flavor

Optimum Nutrition Gold Standard 100 Percent Whey Muscle Building and Recovery Protein Powder with Naturally Occurring Glutamine and BCAA Amino Acids Chocolate Flavour and Vanilla Ice Cream Flavor

PBN - Premium Body Nutrition - Whey-Isolate Protein Powder, 1kg, Strawberry - 33 Servings

Per4m Isolate Zero Premium Whey Protein Powder | 30 Servings Ultra Filtered Isolate Shake + Amino Acids | Muscle Recovery & Optimal Nutrition | Zero Sugar & Low Gluten (900g, Dubai Chocolate)

Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Double Rich Chocolate Flavour, Pack of 24, 24 x 31g

We scanned 878 products

We concluded that: