Defib V3 Advanced Pre Workout Catalyst is a potent pre workout crafted to boost your sessions with explosive energy, sharp focus and lasting stamina. Citrulline malate and caffeine fuel the energy and focus you notice on the gym floor, frankly. Made in the UK with a fully clear label, the blend mirrors our pledge to quality and athlete trust.

Benefits & Features:

• Instant energy to power workouts.
• Citrulline malate supports stronger pumps and better endurance during tough sets.
• Caffeine boosts focus and drive when fatigue hits, helping you push through workouts, frankly.
• Beta alanine helps you push through high intensity without letting fatigue slow you down.
• Designed for serious athletes, it combines a fully transparent label with proven doses and a blend of adaptogenic mushrooms and amino acids to support mental clarity, motivation, and training consistency.

HR Labs Defib V3 is built in the UK to GMP standards and carries halal and vegetarian certifications, underpinning our commitment to safety and ethics. The blend features PeakO2 adaptogenic mushrooms and EnXtra for steady energy and crystal clear focus, while a fully transparent label shows exactly what you’re taking. Designed for serious athletes, this formula is regarded as a top choice in the best pre workout category and in the broader sports nutrition supplements space, helping you train harder and more consistently.

Citrulline Malate 2:1, Beta Alanine, Betaine Anhydrous (Trimethylglycine), Taurine, Flavouring, Peak O2TM Adaptogenic Mushroom Complex (Cordyceps, Reishi, King Trumpet, Shiitake, Lion’s Mane), Acetyl-L-Carnitine, Juniper Berry Extract, Anti Caking Agent (Silicon Dioxide), Acidity Regulator (Citric Acid), Caffeine Anhydrous, RhodioPrimeTM 6X Rhodiola Rosea Extract (6% Salidroside), EnXtra® (Alpinia Galanga), Sweetener (Sucralose), Red Beetroot Extract (Beta Carotene for Lemon Fizz Bombs), Amentopump® (Selaginella Tamariscina Extract), AstraGin® (Astragalus Membracaneous and Panax Notoginseng Extract).

• GTIN: 5060662330650
• Manufacturer: HR Labs
• Size: Lemon Fizz Bombs / 440 grams
• Categories: HR LabsPre Workout Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Defib V3 is a highly dosed, research-driven pre-workout formulated for advanced trainers. It is recommended to take one scoop (10.5g) mixed with 250 – 350ml of water 20 – 30 minutes prior to training. Advanced users may benefit from taking two scoops (21g) in the same way. Do not exceed more than 2 servings in any 24-hour period. Do not use within 5 hours of intended sleep. Store in a cool, dry place, away from direct sunlight and moisture. Keep out of reach of children. Warning: Food supplements should not be used as a substitute for a varied, balanced diet. Not recommended for use by anyone under 18 years of age. Consult your doctor prior to use if you are taking any medication or suffer from any pre-existing medical conditions. High caffeine content (200mg per serving); not suitable for children or pregnant or breastfeeding women. Do not consume caffeine from other sources whilst using this product.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: Citrulline Malate (2:1)

Citrulline malate is a compound mixing the amino acid citrulline with malic acid, used to aid energy production and improved blood flow during workouts.

This form is often sourced to help nitric oxide related activity and endurance in tough high‑intensity training contexts.

What Does Citrulline Malate (2:1) Do?

Citrulline malate helps boost blood flow and may help delay fatigue during intense workouts, supporting performance in resistance training contexts.

Dr. Gonzalez from the University of Connecticut found that citrulline malate can improve repetitions and endurance in resistance‑trained individuals, consistent with EFSA‑aligned interpretations of its role in exercise physiology.

This supplement isn't meant to diagnose, treat, cure, or prevent any disease.

HR Labs brings a science‑led, formulation‑focused approach to Defib V3 Advanced Pre Workout Catalyst that sits alongside Welzo’s commitment to evidence‑driven supplementation. The brand is recognised for its transparent label and research‑driven dosing, with core actives such as Citrulline Malate, Beta Alanine, Betaine and a premium adaptogenic complex designed to support high‑intensity performance. This clarity of formulation reflects HR Labs’ heritage in delivering multisource ingredient science in a single, tightly dosed blend.

Our medical team evaluated HR Labs against peers for manufacturing calibre, safety, and consistency, and we noted their GMP execution and vegetarian plus halal suitability, manufactured in the UK with active industry involvement such as sponsorship of launch‑level sport communities. This combination provides a reliable foundation for product integrity and traceability, reinforced by Welzo’s emphasis on quality and purity. For more on how we verify ingredient quality, see how we verify ingredient quality, and for direct insight from our clinical experts, visit our team of medical experts.

This brand’s disciplined, science‑first approach makes HR Labs a standout partner for this potent pre‑workout, delivering targeted efficacy without compromising safety.