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Protein Supplements

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An essential element in muscle building and repair, protein is a staple no matter your sport - so why not ensure you're investing in the best, courtesy of OnBuy's edit? Ticking off all the popular formats (in the most mouthwatering flavours!) from top sports nutrition brands, our collection has it all - trainers at the ready! Read More >
yntha-6 Edge is a synthesis of premium proteins, producing a protein-packed shake that gives your muscles the protein they need. With multiple game-changing flavours to choose from, the milkshake-like experience of Syntha-6 Edge will have you convinced it's your cheat day. Help grow your muscles and...
£28.32
FREE UK Delivery
Hemp seed has been used as a source of food throughout history. The protein in hemp is a complete protein, which also contains Omega 3 essential fatty acids. It is hypoallergenic and an excellent protein source for vegetarians. Hemp protein is produced with minimal processing. Once harvested, the He...
£9.06
FREE UK Delivery
Grenade:Defend®, an advanced, full spectrum amino acid supplement primarily designed for use during or immediately post workout.
£35.55
FREE UK Delivery
Strenuous exercise initially weakens your body; depleting carbohydrate stores and damaging muscle and connective tissue. During recovery, the body is re-fuelled and the damage to muscle and connective tissue is repaired. If recovery is effective, the body is able to make itself a little stronger in ...
£40.84
FREE UK Delivery
The best value whey protein anywhere in Europe!* Impact Whey Protein® is produced using only premium grade whey protein concentrate, delivering a high 82% protein content. This product has broken all sales records due to its exceptional value for money and great taste. We guarantee* you won...
£20.45
+ £4.75 UK Delivery
It is made-up of 100% premium grade whey protein concentrate and has 20g of protein per serving (80%). This has a comprehensive amino acid profile providing all the essential amino acids (EAA's) and contains over 2g of Leucine per serving. If you're looking for a premium quality whey protein powder ...
£36.73
FREE UK Delivery
The best value whey protein anywhere in Europe!* Impact Whey Protein® is produced using only premium grade whey protein concentrate, delivering a high 82% protein content. This product has broken all sales records due to its exceptional value for money and great taste. We guarantee* you won...
£19.99
+ £4.75 UK Delivery
Our Impact Whey Isolate® is an extremely rich source of whey protein derived from vegetarian sweet cheese, sourced directly from the world's leading whey protein manufacturers. Whey Protein Isolate (WPI) is the ultimate form of whey protein, containing over 90% protein with very little fat...
£44.35
FREE UK Delivery
It is made-up of 100% premium grade whey protein concentrate and has 20g of protein per serving (80%). This has a comprehensive amino acid profile providing all the essential amino acids (EAA's) and contains over 2g of Leucine per serving. If you're looking for a premium quality whey protein powder ...
£20.45
+ £4.75 UK Delivery
Soy Protein Isolate boasts the highest protein content of any soy protein powder. Our Soy Protein Isolate is made from 100% NON-GMO defatted soy beans suing a stringent process which removes a vast majority of the fat and carbohydrate content. The resulting product yields over 90% protein content wi...
£19.99
+ £4.75 UK Delivery
Citrulline Malate is a unique combination of the amino acid citrulline and the organic salt malate that offers athletes a potential method of improving performance, delaying fatigue and accelerating recovery. It is particularly useful for people involved in high intensity exercise such as weight lif...
£38.35
FREE UK Delivery
Green tea originates in China and is made solely from leaves of the camellia sinesis that have undergone minimal oxidation during processing.
£19.75
+ £4.75 UK Delivery
Our Gold Standard 100% Whey is the world's best-selling whey protein. Gold Standard 100% Whey contains Whey Protein Isolates, or WPI. Rated 90+% pure protein, WPI is known as the highest quality whey ingredient. Each delicious serving of Gold Standard 100% Whey contains 24g of premium whey protein...
£29.00
FREE UK Delivery
BSN Syntha-6 Edge Protein Powder
Multiple options available
BSN Syntha-6 Edge Syntha-6 Edge is a synthesis of premium proteins, producing a protein-packed shake that gives your muscles the protein they need. With multiple game-changing flavours to choose from, the milkshake-like experience of Syntha-6 Edge will have you convinced it’s your cheat day....
From: £26.52
FREE UK Delivery
Bsn Truemass 1200 - 4.8kg
Multiple options available
For the true hard-gainer in need of serious caloric support, BSN developed its first super gainer with the introduction of True-Mass 1200. True-Mass 1200 is an ultra-premium super mass gainer designed for individuals with high caloric requirements or those who have difficulty adding and maintaining...
From: £47.17
FREE UK Delivery
Gaspari Myofusion Advanced Protein - 1.8kg
Multiple options available
The ADVANCED formula is the ultimate time-released blend featuring fast acting whey hydrolysate, ultra pure whey isolate, high-grade whey concentrate, slow digesting micellar casein and complete milk protein. Every scoop is packed with 25g of clean muscle building protein with no added sugar, no sy...
From: £46.22
FREE UK Delivery
Bsn Truemass - 2.64kg
Multiple options available
BSN True Mass is a macronutrient-heavy lean mass gainer tailored specifically towards people looking for the additional caloric support necessary to maximize lean muscle mass gains And for individuals that require a heightened level of nutrients owing to a higher metabolic rate. BSN True Mass cont...
From: £42.07
FREE UK Delivery
Bsn Dna Whey - 1.87kg
Multiple options available
Customize your supplement stack with the all-new BSN DNA Series. Each DNA Series product provides versatility to be used with other pre/post-workout supplements to create customized combinations that help you achieve your individual fitness goals. Whey protein is a complete source of protein to he...
From: £39.26
FREE UK Delivery
Phd Nutrition Synergy Iso-7
Multiple options available
PhD Nutrition Synergy Iso-7
From: £36.95
FREE UK Delivery
Reflex Nutrition Instant Mass Heavyweight - 5.4kg
Multiple options available
Reflex Nutrition Instant Mass Heavyweight - 5.4kg
From: £43.00
FREE UK Delivery
Grenade Hydra Whey
Multiple options available
Grenade Hydra Whey
From: £54.82
FREE UK Delivery
Iso Pure Whey Protein Isolate Zero Sugar
Multiple options available
Iso Pure Whey Protein Isolate Zero Sugar
From: £76.30
FREE UK Delivery
PhD Nutrition Diet Whey Slimming Weight Loss Meal Replacement Protein Shake
Multiple options available
PhD Nutrition Diet Whey is Available in 9 Flavours - Banana, Belgian Chocolate, Cherry Bakewell, Chocolate Mint, Chocolate Orange, Chocolate Peanut, Strawberry Delight, Vanilla Crème, White Chocolate.   PhD Nutrition Diet Whey is Available in 4 Sizes - 2kg, 1kg, 500g and limited edition...
From: £13.34
FREE UK Delivery
Phd Nutrition Pharma Whey Ht+
Multiple options available
PhD Nutrition Pharma Whey HT+
From: £46.35
FREE UK Delivery
Reflex Nutrition One Stop Xtreme
Multiple options available
Reflex Nutrition One Stop Xtreme
From: £55.00
FREE UK Delivery
Sci-mx Nutrition Diet Pro Meal
Multiple options available
SCI-MX Nutrition Diet Pro Meal
From: £28.82
FREE UK Delivery
Optimum Nutrition Gold Standard 100% Casein
Multiple options available
Optimum Nutrition Gold Standard 100% Casein
From: £34.14
FREE UK Delivery
Optimum Nutrition Serious Mass
Multiple options available
Optimum Nutrition Serious Mass
From: £48.59
FREE UK Delivery
Hemp protein powder contains around 50% easily absorbed vegetable protein, is rich in fibre and a source of calcium, iron, magnesium, phosphorus, vitamins B and E and Omega 3. Hemp protein powder comes from hemp seeds. On one hand, it inherits all health benefits from hemp seeds, on the othe...
£10.95
+ £1.99 UK Delivery
Biotech USA ISO WHEY Zero Protein Isolate Whey 2270g
Multiple options available
PURITY ABOVE ALL Iso Whey ZERO is made with the purest cross-flow micro filtered whey protein isolate (WPI) possible, while it truly contains ZERO lactose, ZERO trans fat and ZERO added sugar. Iso Whey ZERO, like all BioTechUSA products, consists of 100% safe, carefully selected nutrients. Some li...
From: £68.18
FREE UK Delivery
25g of high biological protein per 30g serving delivered in only 140 calories;Less than 5g of carbs and only 1g of fat;Almost zero lactose, no low quality milk sugars and fats associated with milk based drinks^ Great tasting drink that is uniquely easy to blend due to the fine protein gradiants;Made...
£10.00
FREE UK Delivery
Contains 25g of protein & 21g of complex carbs but only 2g of fat per serving;Ideal as a meal replacement drink;Almost zero lactose, no low quality milk sugars & fats;Easy to Blend Meets GMP & HACCP Standards;Fair Play & Dope Free Certified
£10.00
FREE UK Delivery

About Protein Supplements

The building block of muscles, protein supplements are a key part of reaching (and smashing!) your goals - made trickier by the fact our bodies don't store it easily! Luckily for you, OnBuy's edit is packed with protein for workouts of all types to see you at peak performance. Phew!

From protein capsules to protein drinks, our collection ticks off the top protein supplements (not forgetting the vegan protein supplements, of course!) - and with targeted protein for weight gain and protein for weight loss alike, you're bound to find what you need to succeed here. 

Hunting for protein powder? Discover powdered protein here to slot into all diets and regimes seamlessly: with everything from whey protein to soy protein powder and casein protein powder, finding the best protein powder for you has never been so simple - thank us later!

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