Choose size
20g
101
1g
1.8g
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. 782 protein powders and sports supplements from 181 brands across 11 retailers. Whey protein powder, isolate, vegan, casein and mass gainer are each 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 782 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.
CHEAPEST
Size
500g
20.3g
91
2.5g
0g
Size
1kg
20.2g
97
1.3g
1.8g
Choose size
19.5g
88
1.7g
0.5g
Size
5kg
5.5g
95
16.1g
0.8g
Choose size
22.5g
90
0.5g
0.1g
18g
96
2.2g
1.5g
Size
1.6kg
18.8g
88
0.7g
0.3g
Prices checked daily. 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 / 5g198tracked
Compare creatine
Energy & focus
Pre-workout
Stim and stim-free formulas, with full caffeine dosage disclosure.
Ranked by mg caffeine / £145tracked
Compare pre-workout
Amino acids
BCAAs & EAAs
Branched-chain and essential amino formulas by leucine content.
Ranked by leucine / £137tracked
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 · checked daily
Discount codes,
checked
every day.
When a retailer opens a code, we pick it up on the daily check and rank it by how deep the discount is, not by how big the retailer's ad budget is.
04-10%View
Bulk
Quick Buy BEST VALUE Pure Whey Protein+ Vanilla 900g (163) £38.99 £23.99 Extra 10% off when you buy any 5 products. Code: ANY5
03 - Tools
Built for buyers,
not browsers.
Compare by price per 25g
Filter 782 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 11 retailers, ranked by depth of discount, not ad budget.
Open tool
Cost per 25g.
Compare on facts.
04 - By brand
Compare every brand.
44 brand pages, out of the 181 brands we track. Pick one to see every product it sells, ranked by cost per 25g of protein.
Stories & guides
What we have been working on.
Product Review
Protein Works Diet Meal 360 GOLD Review: Speculoos Biscuit Heaven
7 min read
Price Analysis
Best Value Protein Tub Size: 1kg vs 2kg vs 5kg per 25g of Protein (UK)
7 min read
Price Analysis
Black Friday Protein Deals UK 2026: How to Spot a Real Discount
7 min read
Buying Guide
Best Protein Powder for Over 50s UK: How Much You Need and What It Costs
8 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 )
181 brands, checked daily
We check 782 products across 11 retailers 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 782 protein powders and sports supplements from 181 brands, sold across 11 UK retailers including Amazon UK. 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.