CHEAPEST
Size
660g
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60
Pre-workout
Compare Pre-Workout Prices UK
Compare pre-workout by cost per serving and key doses.
Quick filters
Size
392g
300mg
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45
Size
225g
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30
Size
375g
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2g
5g
50
Size
375g
200mg
3.2g
4g
30
Size
390g
200mg
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30
Size
375g
350mg
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23
Size
390g
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20
Size
250g
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2
Size
480g
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1
Size
200g - 480g · 5 sizes
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Size
534g - 750g · 3 sizes
300mg
3.5g
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Size
500g
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Size
392g
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Size
630g
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Size
320g
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Size
650g
200mg
3.2g
6g
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Size
375g
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Size
250g
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Size
375g
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Size
600g
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Size
463g
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Size
420g
200mg
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Size
390g
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Browse All Pre-workout Products (43)
How we compare pre-workout
Pre-workout is driven by formulation rather than headline price. The research-backed ingredients are caffeine for energy and focus, beta-alanine for endurance buffering, and L-citrulline for blood flow and pump. Effective doses are 150 to 300mg caffeine, 3.2 to 6.4g beta-alanine, and around 6g citrulline per serving.
This page ranks every UK pre-workout by cost per serving. Stim and stim-free formulas sit in separate shelves so you can compare like for like without a heavy caffeine load distorting the picture if you train late or react poorly to stimulants.
Proprietary blends hide the dose of each ingredient behind a total weight, making it impossible to verify whether the formula meets evidence-based thresholds. WheyWise flags products that disclose full doses on the label so you can judge the formulation on its own merits.
Related comparisons
Shop by goal
Pick a target, see the shortlist.
Brand battles
Two brands, one clear winner.
MyproteinBulk
The UK's two biggest DTC brands, head-to-head
ONMyprotein
Premium global vs budget UK favourite
MyproteinProtein Works
Impact Whey vs Whey 80, cheapest per 25g
Power users
Advanced comparison: every product, filteredDense table view with every product, full filter sidebar, and no editorial surfaces.
Methodology
How we rank every bag.
Independent and transparent. Every price is read from the retailer's own page and checked daily. Here's what goes into each score.
01
Cost normalised to £/25g
Every bag divided by its true protein weight, so you see the real cost of a scoop across any size or brand.
02
Protein density, measured
Protein per 100g from the product's own nutrition panel, so a 90% isolate and a 72% concentrate are never compared on bag price alone.
03
Real prices, checked daily
Prices come from the retailer's own listing, never an RRP, and we re-check them every day rather than leaving a feed to drift.
04
Rankings can't be bought
Rank order is cost per 25g of protein. Some outbound links earn commission, and some Amazon links marked Ad pay per click; none of them buy a position in the table.
Questions, answered.
No. Research shows 3 to 6mg per kilogram of body weight is the effective range - around 150 to 300mg for most adults. Above 300mg you're trading performance for jitters, insomnia and a crash, not adding benefit. Check the caffeine column before picking on headline stimulant strength.
Stim-free formulas skip caffeine entirely and lean on citrulline, beta-alanine and nootropics for pump and focus. They're useful if you train in the evening, are caffeine-sensitive, or already get stimulants from coffee. Same cost-per-serving metric applies.
Usually, yes. A blend labelled '8g performance matrix' could mean 7g of filler and 1g of everything you care about. Brands that publish per-ingredient doses give you the data to verify effectiveness. Prefer transparent-label formulas where possible.