CHEAPEST
Choose size
17g
90
2.9g
0.6g
181+ brands tracked
Protein prices,
honestly ranked.
Compare protein prices across the UK retailers we track
The UK's most comprehensive protein powder price comparison. 8 retailers covering whey protein powder, isolate, vegan, casein and mass gainer, every product ranked by cost per 25g of protein so you compare on facts, not marketing.
A preview of the compare page
Protein powder, compare prices and find the best value
Every type, every brand, every budget. Browse all 872 protein powders we compare across UK retailers, ranked by cost per 25g with filters, side-by-side comparison and price history.
Start comparing
Choose a protein type.
21.3g
91
0.4g
0.3g
Choose size
21.5g
93
1.6g
0.2g
Choose size
20.5g
89
0.8g
0.3g
Choose size
11.3g
100
8.8g
2g
Size
375g
21.7g
90
0.3g
0.1g
Size
1kg
17.5g
95
2.5g
1.5g
CHEAPEST
Size
4kg
21.7g
90
0.5g
0.3g
Prices checked within the last 6 hours. Rankings update automatically.
Compare all protein pricesProtein Finder
Not sure which protein you need?
Answer five questions about your goal, your budget and how you like it to taste. The finder ranks what we track against your answers and shows you three, with the reasoning for each.
Start the Protein Finder- Live UK pricesread from each retailer's own page
- Verified nutritiontaken from the product label
- Clear comparisonsso you know why each one won
Also compareNew category
Vitamins & Supplements, compare and save money
Find the lowest prices on vitamins and supplements across the UK's top retailers. Protein is our core, but honest price comparison extends to everything on the health shelf.
Strength & power
Creatine
Ranked by cost per 5g. Monohydrate, HCL, Creapure-certified.
Ranked by cost / 5g111tracked
Compare creatine
Energy & focus
Pre-workout
Stim and stim-free formulas, with full caffeine dosage disclosure.
Ranked by mg caffeine / £94tracked
Compare pre-workout
Amino acids
BCAAs & EAAs
Branched-chain and essential amino formulas by leucine content.
Ranked by leucine / £85tracked
Compare amino acids
WellnessNew vertical
Vitamins & everyday wellness, compared
Multivitamins, omega 3, probiotics, magnesium and herbal supplements from DR.VEGAN, MyProtein, Bulk, Bio-Synergy and Amazon UK. Ranked by cost per month.
480
products tracked
Discount codes · refreshed every 6h
Discount codes,
checked every
six hours.
When a retailer opens a code, we catch it within six hours and rank it by how deep the discount is, not by how big the retailer's ad budget is.
03 - Tools
Built for buyers,
not browsers.
Compare by price per 25g
Filter 872 products by true cost per serving. Not list price, not RRP, what you actually pay per 25g of protein.
Open toolProtein intake calculator
Work out how much protein you need based on weight, activity level and goal. Then jump straight to the cheapest match.
Open toolDeals & discount codes
Discount codes and the biggest price drops across 8 retailers, ranked by depth of discount, not ad budget.
Open tool
Cost per 25g.
Compare on facts.
04 - By brand
Compare every brand.
43 brands tracked. Pick one to see every product it sells, ranked by cost per 25g of protein.
Stories & guides
What we have been working on.
Buying Guide
Best Meal Replacement Shake for Weight Loss UK 2026
12 min read
Product Review
Protein Works Diet Meal 360 GOLD Review: Speculoos Biscuit Heaven
7 min read
Buying Guide
Protein Works Compare UK 2026: Every Range, Tier and Price
8 min read
Price Analysis
Which Protein Brands Put Prices Up in 2026, and Which Did Not
7 min read
The blog
Guides, price breakdowns and honest notes.
Read the blog
05 - Methodology
Comparison built on
real data, not marketing.
Most protein comparison sites rank by affiliate commission. We rank by what you'd actually pay at the till. Here's the difference.
( i )
Price-per-25g, not RRP
Every product is normalised to the true cost per 25g of actual protein content, the only number that matters when you're deciding between a 1kg bag and a 5kg tub.
( ii )
8 retailers, checked daily
We check prices across the brands we track every day, and a person verifies each one against the retailer's own product page before it goes live. No press releases, no stale feeds.
( iii )
Zero pay-for-placement
Rankings are purely algorithmic. We earn from affiliate clicks, never from brands paying to move up the list.
( iv )
Published methodology
Every calculation and data source is documented. If our numbers are wrong, you'll know exactly why.
06 - Why we're different
WheyWise vs typical
protein comparison sites.
WheyWise
How we rank protein
- Cost per 25g of protein - apples-to-apples
- Pulls prices from UK retailers, checked daily
- Rankings are 100% data-driven, never paid
- Shows real stock status on every retailer
- Full nutrition data on every product page
- Completely free, no account, no email wall
Typical comparison sites
How most sites rank protein
- Sticker price only - no normalisation for size or protein
- Narrow retailer coverage, prices often weeks stale
- Sponsored rows push paid brands to the top
- Stock status missing or unreliable
- No nutrition breakdown, just a price and a buy button
- Email-gated content and newsletter signup walls
07 - FAQ
Frequently asked questions
WheyWise tracks over 1,900 products across the UK retailers we list. We normalise every whey protein powder, isolate, vegan, casein and mass gainer to cost per 25g of protein - so you can compare a high quality isolate against a budget concentrate on equal terms, regardless of bag size or brand.
We cover every major protein source: whey concentrate and whey isolate for fast absorption and muscle mass support, plant based options like pea and soy protein for vegan and dairy-free diets, casein for slow-release overnight recovery, and mass gainers for those looking to add extra protein and calories for building muscle.
Yes - completely free. No account needed, no paywalls. We earn a small referral fee when you buy through a retailer link, at no extra cost to you. This keeps the protein supplement comparison tool running without ads or sponsored rankings.
Every day. We check prices across the UK brands we track daily, and a person verifies them against the retailer's own product page before they go live, so what you see is the price the retailer is actually charging rather than a stale feed. Discount codes are reviewed on the same daily cycle, and any code that has expired is removed rather than left to disappoint you at the checkout.
Buying through a retailer link earns us a small referral fee - at no extra cost to you.