Best Pre-Workout Supplements in the UK [Updated for 2025]

When it comes to smashing your workouts, nothing quite compares to the surge of energy and focus a quality pre-workout can offer. Whether you're a seasoned gym-goer or just getting into weight training, having the right supplement in your stack can take your performance to the next level. At Nutrition Now, you’ll find a carefully curated range of pre-workout supplements from top-tier brands like NXT, Redcon1, Rich Piana, Reflex, and Leviathan Labz—trusted by lifters across the UK and Ireland. 

Let’s dive into some of the best pre-workout products available right now and why they’re worth considering for your next gym session.

1. NXT Nutrition TNT Nuclear Shots

If you’re looking for a no-fuss, ultra-convenient pre-workout, the NXT Nutrition TNT Pre Workout Nuclear Shots are an explosive choice. Each 60ml shot is loaded with caffeine, beta-alanine, and niacin to promote energy, endurance, and blood flow—without needing to carry a scoop and shaker everywhere.

Perfect for those early-morning workouts or when you’re short on time, these nuclear shots pack a serious punch. With 12 shots per box, they’re ideal for anyone who trains on the go.

2. Leviathan Labz Doomsday Pre Workout

As intense as the name suggests, the Leviathan Labz Doomsday Pre Workout is built for advanced users who want serious stimulation. This high-stim formula supports razor-sharp focus, heightened alertness, and lasting energy.

With 30 servings per tub, it’s great value for those pushing through high-volume training blocks. If you’re the type who thrives on beast-mode sessions, Doomsday delivers the firepower.

3. Reflex Nutrition Creatine Monohydrate

While not a stimulant-based pre-workout, Reflex Nutrition Creatine Monohydrate is a must-have for strength and power. Creatine is one of the most researched and trusted supplements on the market, and Reflex’s ultra-pure formula helps you build muscle, improve power output, and enhance recovery.

Taking creatine before your workout can support consistent performance and faster progress—making it a perfect pairing with any of the stimulant-based pre-workouts listed here.

4. Redcon1 Total War

If you're chasing total focus, intensity, and muscle pumps, Redcon1 Total War lives up to the hype. Trusted by athletes around the globe, this well-rounded pre-workout hits hard with ingredients like citrulline malate, beta-alanine, caffeine, and taurine.

What sets it apart is its balance between energy and pump—ideal for those who want to lift heavy and feel the mind-muscle connection. Available in multiple flavours, it’s a popular staple in many gym bags.

5. Rich Piana 5% 5150 Pre Workout

Not for the faint-hearted, Rich Piana 5% 5150 Pre Workout is stacked with a blend of caffeine sources that create a smooth yet intense energy curve. Designed by the late bodybuilding icon Rich Piana, this pre-workout is all about going all in.

The combination of focus, energy, and endurance makes it perfect for high-intensity training, whether you’re hitting hypertrophy sets or crushing a brutal leg day.

How to Choose the Right Pre-Workout?

When choosing the best pre-workout supplement, it’s worth considering:

• Your training style – High-stim pre-workouts like Doomsday or 5150 are ideal for heavy lifters, while TNT Shots suit busy gym-goers needing quick energy.

• Caffeine tolerance – If you’re sensitive to stimulants, go easy or opt for stim-free options and pair with creatine for performance.

• Goals – For strength gains, creatine is king. For pump and focus, look for ingredients like citrulline and tyrosine.

All of the above supplements are available online from Nutrition Now, who offer fast shipping across the UK and Ireland and stock only the best brands in the business.

Final Thoughts

The right pre-workout can be a game-changer. Whether you’re chasing new PRs, battling through fatigue, or just want to get in the zone, there’s something in the Nutrition Now collection that fits the bill.

Explore the full Pre Workout collection here and find the perfect supplement to fuel your fitness goals.