56% below avg
Prices shown with their check date
UK protein deals, sales & discount codes.
Price drops we measured between our own checks, plus the best in-stock value per 25g of protein across the UK retailers we list. Every price carries the date it was checked, and working discount codes are listed separately.
Best available offers
Deal
Extra 12% off your order at Protein Works
At The Protein Works
- No minimum spend required to redeem.
- Cannot be used in conjunction with other codes
- Excludes Whey Protein 80 - BLACK, Diet Whey Protein Isolate - BLACK, all bundles & gift vouchers
CodeWW12
Discount codes
CodeOfferTypeExpiresActions
WW12Offer:Extra 12% off your order at Protein WorksDealExpires:-
KEVIN-RN3YOffer:Spend £45 plus and you will get £15 off on your first order.First orderExpires:-
Deal of the Day
68% below avgWhey ConcentrateBest Value Today
Bulk - Diet Whey ProteinAmazon UK·4kg·6 flavours
£47.89
£1.20/100g£0.44/25g protein
You save £103.71 vs average market price
ℹ How our buttons work: "Buy on Amazon" links to Amazon where available - convenient for Prime members. "Direct from retailer" goes to the brand's own site, which is sometimes cheaper. We always show the actual cheapest price and flag it honestly. WheyWise earns a small commission on Amazon purchases, which keeps this tool free.
Best Deal by Protein Type
Whey Isolate74% below avg
Vegan79% below avg
Mass Gainer56% below avg
30 products tracked
All deals sorted by value
56% below avg
52% below avg
50% below avg
65% below avg
50% below avg
Want full filters, sort controls and price history? Browse all 872 products on the compare page.
Price drops we measured
These are not retailer sale badges. Each row compares two prices we recorded ourselves, on the dates shown, so you can see exactly what changed and when. Products we have only ever priced once are not listed, because there is nothing to compare them against.
Best value protein powder right now
This table is ranked by real cost per 25g of protein, not by headline discount, so a whey sale can be compared fairly against a vegan, isolate or clear whey offer. It is a value ranking rather than a list of price cuts: for measured cuts, see the table above.
| Product | Type | Price | Per 25g protein |
|---|---|---|---|
| Pure Source Nutrition PSN Soy Protein Powder · Amazon UK | Vegan | £39.99 | £0.22 |
| Pure Source Nutrition PSN Pea Protein Powder · Amazon UK | Vegan | £39.99 | £0.23 |
| Peak Supps Soy Protein Isolate 90% · Amazon UK | Vegan | £45.99 | £0.25 |
| NutriSport NutriVegan 90+ Unflavoured Vegan Protein · Amazon UK | Vegan | £46.99 | £0.26 |
| NutriSport 90+ Vegan Protein · Amazon UK | Vegan | £46.99 | £0.26 |
| XCelerate Nutrition Soy Protein Powder · Amazon UK | Vegan | £39.99 | £0.29 |
| NutriSport Protein Plus Complex Carbs Powder · Amazon UK | Other | £41.99 | £0.30 |
| PER4M Nutrition Plant Protein · Amazon UK | Vegan | £18.99 | £0.33 |
Best protein sales by brand
MyProtein sale
MyProtein runs discount codes almost continuously, with larger sales around payday, Impact Week, Black Friday and January, often 40-60% off RRP. Because the RRP is inflated, the code price is where the real value sits. See the live MyProtein prices sorted by cost per 25g of protein.
Bulk sale
Bulk uses lower, more stable everyday pricing than MyProtein, with occasional 20-30% off sitewide events. Its Pure Whey is consistently among the cheapest per 25g of protein even off-sale, so a Bulk sale often produces the outright cheapest deal on this page. Compare live Bulk prices.
Protein Works offers
Protein Works discounts frequently across its whey and vegan ranges, often 30% or more, and has one of the widest flavour selections in the UK. Check the live Protein Works prices before buying.
FAQ
Frequently asked questions
Where can I find protein powder deals in the UK?
This page has two halves. The first lists price drops we measured ourselves, comparing two of our own recorded prices and showing both dates, so a drop is something we observed rather than a retailer sale badge. The second ranks in-stock products by real cost per 25g of protein, which is the better guide to everyday value. Working discount codes are listed separately.
How do I use a protein powder discount code?
Copy the code shown next to the retailer name on this page, add your protein powder to the basket on the retailer's website, and paste the code at checkout. Codes are verified weekly but can expire without notice - if one does not work, check back for updated codes.
Do protein powder prices change often?
Yes. Retailers adjust prices regularly, especially around sales events like Black Friday, January sales and bank holidays. Prices also fluctuate based on stock levels and new product launches. Amazon prices are refreshed daily and other retailers less often, so every price is shown with the date it was checked.
How does WheyWise rank the best protein deals?
We sort every in-stock deal by real cost per 25g of protein after the discount, so the best-value offer sits at the top rather than the biggest headline percentage. If you want the lowest everyday price regardless of whether a product is on sale, our price-per-25g comparison ranks every product we track.
When is the next MyProtein sale?
MyProtein runs discount codes almost continuously and holds larger sales around payday, Impact Week, Black Friday and January. There is rarely a bad time to find a working MyProtein code, so buy when you need it and stack the best current code with a large bag.
Do protein powders go on sale on Black Friday?
Yes. Black Friday and January are the two biggest protein sale periods in the UK, with MyProtein, Bulk and Protein Works all discounting heavily. Whey price drops of 40 percent or more are common during these events.