Whether you're pushing through a tough leg session or trying to find that extra gear for a PB, a good pre-workout can make a real difference. But with hundreds of options on shelves and online, choosing the right one is harder than it sounds.

At Buffalo Nutrition — North West London's top-rated supplement store — we've tried them all. Here's our honest guide to the best pre-workout supplements available in the UK right now.

What to Look for in a Pre-Workout

Caffeine is the backbone of most pre-workouts. Effective doses typically range from 150mg to 300mg per serving. Anything under 100mg won't move the needle much; anything over 350mg risks jitters and crashes.

L-Citrulline drives blood flow and pump. Look for 6,000–8,000mg of L-Citrulline for a meaningful effect.

Beta-Alanine reduces fatigue in high-rep, high-intensity work. The tingle you feel is normal — it's called paraesthesia and it's harmless. Effective dose: 3.2g+.

Nootropics like L-Theanine and Alpha-GPC help sharpen focus without the crash.

Our Top Picks for 2026

1. Applied Nutrition ABE (All Black Everything)

The most popular pre-workout we sell at our London store, and for good reason. ABE delivers 200mg of caffeine, a solid citrulline dose, and a great range of flavours. It's the go-to for gym-goers who want reliable energy without going overboard.

Best for: Everyday training, beginners to intermediates | Caffeine: 200mg

2. Cellucor C4 Original

C4 is a global bestseller for a reason. It's approachable, well-dosed for beginners, and available in a wide variety of flavours. If you're new to pre-workouts, this is a smart starting point.

Best for: Beginners and those sensitive to stimulants | Caffeine: 150mg

3. Grenade .50 Calibre

One of the strongest pre-workouts on the UK market. Designed for experienced gym-goers who want maximum intensity. Take a half-serving first to assess your tolerance.

Best for: Experienced gym-goers, high-intensity training

4. Buffalo Nutrition Alpha XT (Own Brand)

Our own-formula pre-workout with 200mg caffeine, L-Citrulline, and Beta-Alanine at full clinical doses. No proprietary blends — full transparency on every ingredient. Great value.

5. Stim-Free Pump Formulas

If you train in the evening or are caffeine-sensitive, a stimulant-free pre-workout is a great alternative. Ask our team in-store for current recommendations.

Pre-Workout FAQ

How long before training should I take a pre-workout? 20–30 minutes before your session.

Can I take pre-workout every day? Best to cycle — use 3–4 times per week and take a 2-week break every 6–8 weeks.

Are pre-workouts safe? Yes, when taken as directed. Consult your GP if you have heart conditions or high blood pressure.

Where to Buy Pre-Workout in London

Shop our full range at buffalonutrition.co.uk/collections/pre-workouts with free delivery over £50, or visit us at 132 Cricklewood Broadway, London NW2 3EE — Mon–Sat 10:30am–7pm.