80% below avg
Live · prices checked today
UK protein deals, sales & discount codes.
The cheapest in-stock protein powders and biggest price drops across 85+ UK retailers today, sorted by best value per 25g of protein, with live discount codes applied.
Best available offers
Deal
Extra 12% off your order at Protein Works
At ProteinWorks
- 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
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Deal of the Day
40% below avgWhey ConcentrateBest Value Today
DNA Sports - DNA Sports Advanced Whey Protein Powder 2kgT-Nutrition·2kg·2 flavours
£39.99
£2.00/100g£0.69/25g protein
You save £26.81 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 Concentrate40% below avg
Whey Isolate56% below avg
Casein59% below avg
Mass Gainer59% below avg
30 products tracked
All deals sorted by value
59% below avg
Applied Nutrition
Applied Nutrition Critical Mass Original – High Calorie Weight Gainer | 917 Calories | Informed-Sport Tested | 6kg
Mass Gainer6kg
73% below avg
49% below avg
49% below avg
47% below avg
Applied Nutrition
Applied Nutrition Critical Mass Professional – Lean Mass Gainer | 42g Protein | Informed-Sport Tested | 6kg
Mass Gainer6kg
Want full filters, sort controls and price history? Browse all 1,477 products on the compare page.
Cheapest protein powder deals right now
WheyWise tracks protein powder prices across 85+ UK retailers every week and surfaces the biggest price drops, live sales and working discount codes in one place. Every deal below is ranked by real cost per 25g of protein, so you can compare a whey protein sale against a vegan, isolate or clear whey offer fairly, not just by sticker price.
| Product | Type | Price | Per 25g protein |
|---|---|---|---|
| Peak Supps Pea Protein Isolate 80% · Peak Supps | Vegan | £38.99 | £0.24 |
| Peak Supps Soy Protein Isolate 90% · Peak Supps | Vegan | £44.99 | £0.25 |
| Supreme PLC Meal Shake 1.7kg · Sealions | Vegan | £10.00 | £0.33 |
| Peak Supps Organic Rice Protein Powder 80% · Peak Supps | Mass Gainer | £72.99 | £0.46 |
| GN Vegan Protein 80 Pea Protein Powder · Amazon UK | Vegan | £14.99 | £0.47 |
| PBN Premium Body Nutrition Micellar Casein · Amazon UK | Casein | £30.55 | £0.50 |
| Peak Supps Organic Hemp Protein Powder 50% · Peak Supps | Vegan | £48.99 | £0.51 |
| NXT Nutrition NXT Beef Protein Isolate 1.8kg (Short BBE) · Nutrition Now | Whey Isolate | £34.99 | £0.54 |
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?
WheyWise tracks prices across 85+ UK retailers every week and highlights products with the biggest price drops, active sales and live discount codes. This page shows the best current deals so you can catch savings without checking every site. For the lowest everyday cost per 25g regardless of sales, use our price-per-25g comparison.
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. We check prices weekly so you always see current deals.
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.