Compare Gym Supplements Prices UK

A buyer's guide to gym supplement prices in the UK

The same pricing problems that plague protein powder apply across the wider supplement shelf. Inflated RRPs, permanent discount codes, inconsistent tub sizes, and wildly different active- ingredient doses make a fair like-for-like comparison almost impossible without a tool that normalises every product to the same per-serve metric. This guide explains what WheyWise measures on creatine, pre-workout, post-workout and amino acid supplements, and how to use the category hubs above to find the best value product for your training goals.

Why compare gym supplement prices?

Supplement pricing is rarely what it looks like on the tub. A 300g tub of creatine at £20 and a 500g tub at £25 both look like reasonable buys until you divide by cost per 5g daily dose. The 300g tub works out to roughly 33 pence per serving; the 500g tub comes in at 25 pence. That is a 25 percent cost gap on the same product form, hidden behind the different tub size.

Pre-workout is even worse. Two tubs can both be labelled "pre- workout" and contain radically different caffeine doses, beta-alanine levels, and citrulline amounts. A £30 tub with proprietary blends hiding the individual doses is not directly comparable to a £35 transparent-label tub at clinical doses, even though the sticker price suggests the first is cheaper. WheyWise surfaces caffeine, beta-alanine, and citrulline content alongside the price so buyers can see what they are actually getting per pound spent.

Third-party certification compounds the problem. Informed Sport and Informed Choice-tested products typically cost 10 to 30 percent more than uncertified generic, which is a real premium for competitive athletes but a waste for recreational lifters. The WheyWise spec sheet makes certification status visible up front so users can price the certification premium explicitly rather than pay for it by accident.

How to compare gym supplement prices with WheyWise

The hub above splits the supplement shelf into four verticals: creatine, pre-workout, post-workout, and amino acids. Each hub uses the metric that matters for its category. Creatine is ranked by cost per 5 grams because creatine monohydrate performance is saturation-based and 5 grams is the daily benchmark dose. Pre-workout is ranked by caffeine-milligrams-per-pound alongside cost per serving, since caffeine is the headline active and formulations vary too much for a single-metric ranking.

Post-workout is ranked by cost per serving because recovery formulas combine protein, carbs, and EAAs at ratios that matter more than any single macro; per-serve is the cleanest normalisation. BCAA and EAA supplements are ranked by leucine content per pound, since leucine is the amino acid that drives muscle protein synthesis and the only BCAA worth paying a premium for.

Each vertical page also surfaces the spec sheet for every product: creatine form (monohydrate / HCL / Creapure certified), stim profile for pre-workout (stim / stim-free / low-stim), protein-plus-carbs ratios for post-workout, and BCAA ratios for aminos. Pin any two products and compare them side by side via the compare tray at the bottom of each page.

What we look at to rank every product

Four factors drive every ranking on these pages. The primary sort metric is cost per effective dose: cost per 5g creatine, cost per serving pre-workout, cost per serving post-workout, or leucine per pound for BCAAs. This is always the number shown on the card.

The secondary factor is formulation. On creatine this is the form: monohydrate (the research-backed standard), HCL (more soluble but no performance advantage), or Creapure (99.99 percent purity verified by HPLC testing, produced by AlzChem in Germany). On pre-workout it is the stim profile: stim (150 to 300 milligrams caffeine per serving), stim-free (zero caffeine, higher citrulline), or low-stim (under 100 milligrams caffeine). On post-workout it is the protein plus carbs plus EAA ratio.

The third factor is third-party certification. Informed Sport tests each batch for banned substances on the World Anti- Doping Agency prohibited list. Informed Choice tests for banned substances without verifying purity separately. Creapure certification verifies purity without banned-substance testing. Products with multiple certifications (Creapure and Informed Sport on the same tub, for example) stack the two guarantees and typically command a premium of 15 to 30 percent over uncertified generic.

The fourth factor is demand signal. Amazon UK review counts and brand-direct Trustpilot scores feed the volume ranking that surfaces products people actually re-buy. A product with strong cost-per-dose but no demand signal often has a hidden problem (taste, texture, availability) that a buyer should know about before committing to a 3-month tub.

Common questions beyond the comparison

Best creatine UK: the creatine ranking above surfaces the current cheapest per 5g dose in real time. For the full buying-guide breakdown covering budget / mainstream / premium / HCL picks with detailed rationales see the Best Creatine UK 2026 guide.

Best pre-workout for weight training: the pre-workout ranking leans toward transparent-label products hitting the research-effective 200 milligrams caffeine, 3.2 grams beta-alanine, and 6 grams citrulline malate thresholds. The dedicated Best Pre-Workout for Weight Training guide covers the full shortlist.

How much creatine per day: the maintenance dose is 3 to 5 grams per day of creatine monohydrate, taken every day. Loading phases (20 to 25 grams per day for 5 to 7 days) are optional and accelerate muscle saturation by two to three weeks. See the How Much Creatine Per Day guide for dosing details.

Is Creapure worth the premium: Creapure delivers verified 99.99 percent purity and typical Informed Sport certification at roughly twice the price of generic creatine monohydrate. For competitive athletes and long-term daily users the premium is worth it; for recreational lifters the performance outcome is identical. The Creapure vs Generic guide has the full breakdown.

Stim vs stim-free pre-workout: stim pre-workouts contain 150 to 400 milligrams of caffeine per serving and suit morning training. Stim-free pre-workouts remove the caffeine entirely and lean on citrulline, Nitrosigine, and beta-alanine for pump-focused sessions, evening training, or users who already drink coffee. See Stim vs Stim-Free Pre-Workout for the decision framework.

Supplement deals UK: the WheyWise deals page surfaces every active voucher code and flash sale across UK supplement retailers, ranked by discount depth. Codes are refreshed every six hours so expired promotions never sit on the page. Combining a flash sale with the cost-per-dose ranking above usually delivers the cheapest possible price on any supplement at any given moment.

Questions, answered.