Quick answer
MyProtein Impact Whey is our best overall UK protein powder when its live cost per 1g protein is within 10% of Bulk Pure Whey. It wins on flavour choice and pack flexibility. Bulk becomes our pick when it is more than 10% cheaper; Optimum Nutrition Gold Standard is the premium taste choice, not the value winner. Most buyers should start with whey concentrate. Pay for isolate only when lower lactose or tighter macros solve a real problem, and choose a pea-and-rice blend or soy isolate when avoiding dairy. The live table below matters more than any fixed sale price printed in this article.
Best overall value: MyProtein Impact Whey
MyProtein Impact Whey consistently lands as the cheapest per 100g, largely because it is on sale most of the time. On offer it typically runs £1.40 to £1.60 per 100g, which is hard to beat. Protein content sits around 82g per 100g, so each serving delivers a strong dose of essential amino acids for muscle repair after training. Dozens of flavours make it easy to keep a post workout shake interesting rather than a chore.
The catch is that the listed price is often inflated so the constant discount looks bigger than it is. Ignore the percentage off and judge by the per 100g price instead, since that is the only figure that reflects what you actually pay.
Live comparison
Whey Protein products
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 50001167 £39.99 24.3g114£0.239 1000133 £14.99 24.3g114£0.454 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 3000177 £38.99 29.6g148£0.506 2000151 £28.99 29.6g148£0.568 1000126 £16.99 29.6g148£0.653 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 25001100 £47.49 18.0g110£0.475 1000152 £19.99 18.0g110£0.384 2250190 £74.49 17.0g109£0.828 750130 £25.99 17.0g109£0.866 375115 £15.49 17.0g109£1.033 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 48001160 £85.69 17.7g110£0.536 2400180 £44.79 17.7g110£0.560 1200140 £23.19 17.7g110£0.580 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 50001156 £129.99 23.0g121£0.833 2500178 £67.99 23.0g121£0.872 1000131 £27.99 23.0g121£0.903 500116 £15.99 23.0g121£0.999 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2000162 £47.99 20.0g125£0.774 1000131 £29.99 20.0g125£0.967 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 50001167 £139.99 22.0g113£0.838 2500183 £74.99 22.0g113£0.903 1000133 £31.99 22.0g113£0.969 500117 £16.99 22.0g113£0.999 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2100170 £59.95 22.5g113£0.856 510117 £29.95 22.5g113£1.762 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1800172 £54.95 20.0g-£0.763 1000140 £32.95 20.0g-£0.824 450118 £19.95 20.0g-£1.108 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 48001160 £125.99 20.4g111£0.787 2400180 £65.89 20.4g111£0.824 1200140 £34.09 20.4g111£0.852 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 50001167 £149.99 23.1g110£0.898 2000167 £62.99 23.1g110£0.940 1000133 £32.99 23.1g110£1.000 500117 £18.99 23.1g110£1.117 6012 £3.99 23.1g110£1.995 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 50001167 £159.99 23.7g119£0.958 30001100 £99.99 23.7g119£1.000 2000167 £69.99 23.7g119£1.045 1000133 £35.99 23.7g119£1.091 500117 £19.99 23.7g119£1.176 6012 £4.49 23.7g119£2.245 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 48001136 £134.99 24.4g127£0.993 2400168 £70.59 24.4g127£1.038 1200134 £36.59 24.4g127£1.076 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2000161 £59.95 24.0g120£0.983 825125 £29.95 24.0g120£1.198 450114 £16.95 24.0g120£1.211 13214 £8.95 24.0g120£2.237 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 36001150 £124.49 20.0g94£0.830 50001166 £157.49 19.0g94£0.949 34501150 £124.49 20.0g91£0.830 37501150 £124.49 20.0g96£0.830 2160190 £77.49 20.0g94£0.861 2070190 £77.49 20.0g90£0.861 2250190 £77.49 20.0g96£0.861 2500183 £82.99 23.0g114£1.000 43501150 £139.99 22.0g114£0.933 930130 £31.49 23.0g115£1.050 45001150 £154.49 23.0g114£1.030 720130 £27.99 20.0g94£0.933 2610190 £87.49 22.0g114£0.972 690130 £27.99 20.0g91£0.933 750130 £27.99 20.0g96£0.933 1920160 £66.49 22.0g114£1.108 2700190 £97.49 23.0g114£1.083 1000140 £34.99 18.0g98£0.875 1800160 £66.49 23.0g114£1.108 870130 £31.49 22.0g114£1.050 900130 £34.99 23.0g114£1.166 2520190 £97.49 20.0g105£1.083 360115 £16.99 20.0g94£1.133 345115 £16.99 20.0g91£1.133 375115 £16.99 20.0g96£1.133 840130 £34.99 20.0g105£1.166 465115 £19.99 22.0g114£1.333 960130 £34.99 20.0g124£1.166 2000166 £76.99 20.0g120£1.167 600120 £24.99 20.0g112£1.249 435115 £19.99 22.0g114£1.333 450115 £20.99 22.0g113£1.399 500116 £24.49 20.0g113£1.531 480115 £24.49 20.0g113£1.633 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1000130 £31.99 25.0g131£1.066 500115 £17.99 25.0g131£1.199 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2500171 £63.49 22.0g140£0.894 1000128 £25.99 21.0g137£0.928 500114 £15.49 22.0g140£1.106 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 908127 £28.00 24.0g-£1.037 2000159 £67.50 24.0g-£1.144 476114 £18.00 24.0g-£1.286 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2270176 £79.99 24.0g113£1.052 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2270161 £61.00 22.0g150£1.000 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 930130 £31.49 23.0g115£1.050 43501150 £139.99 20.0g108£0.933 2700190 £87.49 20.0g104£0.972 45001150 £139.99 20.0g109£0.933 2610190 £87.49 20.0g108£0.972 870130 £31.49 20.0g108£1.050 900130 £31.49 20.0g109£1.050 465115 £19.99 23.0g115£1.333 450115 £19.99 20.0g104£1.333 435115 £19.99 20.0g108£1.333 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 900130 £30.00 22.0g113£1.000 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2010167 £69.99 22.0g115£1.045 900130 £44.99 22.0g115£1.500 450115 £28.99 22.0g114£1.933 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 900130 £28.00 20.0g-£0.933 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 40001133 £139.69 22.3g113£1.050 2000166 £72.49 22.4g113£1.098 1000133 £37.59 22.4g113£1.139 500116 £21.49 23.1g113£1.343 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2270170 £80.00 24.0g120£1.143 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2500183 £91.99 23.0g110£1.108 1000133 £39.99 23.0g110£1.212 500117 £23.49 23.0g110£1.382 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1000140 £36.49 22.0g113£0.912 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1800172 £75.00 21.0g-£1.042 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 5000183 £138.99 33.0g203£1.675 1000116 £30.49 35.0g214£1.906 2500141 £71.99 32.0g209£1.756 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 650124 £22.00 18.0g98£0.917 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2250164 £69.99 21.4g110£1.094 908126 £39.99 21.4g110£1.538 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2267.96176 £96.00 25.0g120£1.263 1133.98138 £53.00 25.0g120£1.395 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2000166 £71.99 20.6g108£1.091 1000133 £39.99 20.6g108£1.212 500116 £21.99 21.3g108£1.374 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2280176 £98.00 24.0g113£1.289 900130 £50.00 24.0g113£1.667 600120 £40.00 24.0g114£2.000 450115 £32.00 24.0g113£2.133 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2000159 £77.50 24.0g-£1.314 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 899129 £34.99 22.0g120£1.207 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1000140 £37.99 17.0g90£0.950 500120 £19.99 17.0g90£0.999 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 500120 £19.99 17.8g97£0.999 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 420114 £18.99 23.4g113£1.356 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1800160 £69.99 20.1g112£1.166 1200140 £47.49 20.1g112£1.187 600120 £24.99 20.1g112£1.249 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 900130 £43.99 25.2g111£1.466 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2250175 £119.99 27.3g110£1.600 750125 £49.99 27.3g110£2.000 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 48001192 £224.00 19.6g99£1.167 2400196 £120.00 19.6g99£1.250 1200148 £62.00 19.6g99£1.292 60001160 £208.00 16.2g141£1.300 400116 £26.00 19.6g99£1.625 3000180 £110.50 16.2g141£1.381 1800148 £70.20 16.2g141£1.463 600116 £29.00 16.2g141£1.813 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1020130 £44.99 25.0g130£1.500 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1000133 £48.95 22.0g115£1.483 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1000133 £48.95 22.0g115£1.483 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1000133 £48.95 22.0g115£1.483 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 1000129 £36.99 19.3g128£1.276 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 640120 £27.49 20.0g120£1.374 620120 £27.49 20.0g115£1.374 600120 £27.49 20.0g111£1.374 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 300110 £24.99 22.0g100£2.499 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 3111 £3.49 24.0g113£3.490 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 2000161 £67.50 1.8g116£1.107 908128 £35.00 1.8g116£1.250 |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 20001- £75.00 --- |
FlavourSize (g)Size (ml)QtyServingsOfferTotal Per serving 10011 £25.00 --£25.000 |
Best overall Whey Protein
Sports Fuel Premium Protein
Bodybuilding Warehouse · 5kg
Pros
- Whey concentrate supplies a complete essential-amino-acid profile
- 79% below the £3.81/100g average across 53 comparable /compare listings
Cons
- Whey concentrate may not suit lactose-sensitive users
Best runner-up: Bulk Pure Whey Protein
Bulk is MyProtein's closest rival on price, with Pure Whey Protein sitting around £1.50 per 100g and comparable quality. It uses the same type of grass-fed whey concentrate, so the amino acid profile is similar. Some buyers prefer Bulk's flavours, particularly the vanilla, which tastes less artificial than MyProtein's version.
Bulk also runs frequent sales and stocks sizes from 500g up to 5kg, so it scales well whether you are trying it out or committing to a bigger bag. For anyone building muscle on a budget, Bulk is one of the more reliable ways to keep protein intake high without overspending.
Best isolate: MyProtein Impact Whey Isolate
If you are lactose intolerant or want a cleaner macro profile, whey isolate is worth the extra cost. MyProtein's isolate runs around £2.50 to £3.00 per 100g, roughly double the concentrate, but protein content is higher at around 90g per 100g and it carries less fat and carbohydrate. The higher amino acid concentration and faster absorption make it a popular post workout choice for people training intensely. Compare all whey isolate prices to find the cheapest option right now.
Community perspective
What others are saying
Seems like a lot of effort to turn that into a vanilla flavoured protein powder?
u/EndPsychological2541 in r/AskUK
Second this, they recently had the ‘360’ version of their whey protein Vanilla Crème and it’s the best I’ve had. Optimum Nutrition is good but a little pricey. Worth it though. I can’t drink my protein anymore, really bad quality these days.
u/discoveredunknown in r/AskUK
Watch what buyers found
Hands-on opinions
I Compared MyProtein's Impact Whey to Every Top Selling Protein in the UK
Tom Newsham Fitness
A hands-on UK comparison to accompany the live ranking.
Best budget pick: Protein Works Whey Concentrate 80
Protein Works often gets overlooked, but its whey concentrate regularly comes in under £1.60 per 100g once a sale and discount code stack together. The flavour range is decent and quality holds steady tub to tub.
How to actually compare
Compare price per 100g, not total price. A 2.5kg bag looks expensive next to a 1kg bag, but it is almost always cheaper per gram once you do the maths. Use the protein powder price comparison to see current prices across all retailers sorted by per 100g cost, and browse by type, whether that is whey concentrate, whey isolate, or vegan protein.
Factor in active discount codes too, since a 25% off code can turn a seemingly expensive retailer into the cheapest option overnight. Check the protein powder discount codes for today's offers, or read MyProtein vs Bulk: which is cheaper? for a direct comparison.
How to choose the right protein powder
With so many options available, picking the right protein powder comes down to a few practical questions. Start with your goal. For muscle building after intense training, a whey protein powder with a complete amino acid profile, rich in leucine, is the most effective choice. On a plant-based diet, vegan blends made from pea, rice, or hemp still deliver useful plant protein, though the amino acid profile is usually less complete per serving than whey.
Next, think about when you will actually use it. A shake mixed with water is the simplest post workout option, but protein powder blends just as well into porridge, smoothies, or baking. That versatility makes it easier to hit a daily protein target as part of a balanced diet, particularly if whole foods alone do not get you there. UK government guidelines suggest most adults need around 0.75g of protein per kilogram of bodyweight, but anyone doing regular resistance training will likely benefit from a higher intake, typically 1.6 to 2.2g per kilogram, to support muscle repair and growth.
Do not overthink the final choice. The gap between a good whey concentrate and a premium isolate matters less than consistency. Pick something you can afford every month, that you actually enjoy drinking, and that fits your macros. Any reputable brand on this list will support your goals: the best protein powder is the one you will keep using. If you are unsure where to start, use the comparison tool to sort by price and find the cheapest match for your needs.
References
Sources and further reading
- 01Morton et al. — protein supplementation and resistance training
Evidence used to prioritise adequate total protein over premium branding.
- 02MyProtein — Impact Whey Protein
Official information for the overall pick.