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Cheapest overallWarrior
Rage Pre-Workout Powder - 392g (45 Servings)62 bought this week
62bought this week
Bag · 392g
£9.89
Pre-workout
Compare Pre-Workout Prices UK
Compare protein prices from MyProtein, Bulk, Optimum Nutrition and 85+ other UK retailers. Every product ranked by cost per 25g of protein. Free, updated weekly.
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This week · editorial podium
Three deals we'd buy right now.
Hand-picked by our nutrition team every Monday, 07:00. Scored on formulation, cost per serving, and weekly velocity.
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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.
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Methodology
How we rank every bag.
Independent, transparent, and updated weekly. 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 quality, not just %
Protein %, leucine and digestibility feed the Performance score. A 90% isolate and a 90% vegan blend are not the same.
03
Clean-label audit
Ingredient count, artificial sweeteners, added sugars, third-party certifications. 0 to 100 score.
04
Social and review signals
Weekly purchase volume and weighted review scores surface what people actually re-buy, not just what ranks on search.
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.