Protein prices,
honestly ranked.

Compare protein prices across 90+ UK retailers

Row of popular UK protein powder brands including MyProtein, Optimum Nutrition, Ghost and MuscleTech
Compare protein prices3,404 products · sorted by price-per-25g

Completely free • No account needed • Free discount codes

The UK's most comprehensive protein powder price comparison. 98 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.

This week · editorial podium

Three deals we'd buy right now.

A preview of the compare page

Protein powder, compare prices and find the best value

Every type, every brand, every budget. Browse all 3,404 protein powders we compare across UK retailers, ranked by cost per 25g with filters, side-by-side comparison and price history.

Prices checked within the last 6 hours. Rankings update automatically.
Compare all protein prices
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.

Browse all supplements
Strength & power

Creatine

Ranked by cost per 5g. Monohydrate, HCL, Creapure-certified.

Ranked by cost / 5g253tracked
Compare creatine
Energy & focus

Pre-workout

Stim and stim-free formulas, with full caffeine dosage disclosure.

Ranked by mg caffeine / £173tracked
Compare pre-workout
Recovery

Post-workout

Protein + carbs + EAA blends for faster recovery.

Ranked by cost / serving1tracked
Compare post-workout
Amino acids

BCAAs & EAAs

Branched-chain and essential amino formulas by leucine content.

Ranked by leucine / £208tracked
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
Browse vitamins

Live · updated every 6h

Price drops,
tracked in
real time.

When a retailer cuts a price or 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.

See all 2 dealsHow tracking works
01
Myprotein
Extra 8% off (10% during 21-31 May)
-8%View
02
Myprotein
Spend £45 plus and you will get £15 off on your first order.
-£15View

03 — Tools

Built for buyers,
not browsers.

01

Compare by price per 25g

Filter 3,404 products by true cost per serving. Not list price, not RRP, what you actually pay per 25g of protein.

Open tool
02

Protein intake calculator

Work out how much protein you need based on weight, activity level and goal. Then jump straight to the cheapest match.

Open tool
03

Live deals & price drops

Watch any product across 98 retailers. We catch price cuts within six hours and rank them by depth of discount, not ad budget.

Open tool

04 — By brand

Compare every brand.
Or jump to Amazon.

Myprotein protein powder

Myprotein

46 products

Compare pricesAmazon
Optimum Nutrition protein powder

Optimum Nutrition

102 products

Compare pricesAmazon
Grenade protein powder

Grenade

3 products

Compare pricesAmazon
All brands

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)

98 retailers, crawled weekly

We don't wait for press releases. If Bulk drops a price, it's in the ranking by our next crawl.

(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 90+ UK retailers, refreshed weekly
  • 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 90+ UK retailers every week. 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.

Prices are checked weekly across all tracked retailers. We also surface live discount codes from MyProtein, Bulk, The Protein Works, and dozens more — so you always find the best deal whether you need an inexpensive protein supplement or a premium isolate.

Buying through a retailer link earns us a small referral fee — at no extra cost to you.