HR Labs Defib V3 Advanced Pre Workout Catalyst

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).

United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched 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 14 days in the same original and unopened packaging. Subject to T&C's.

Welzo is a UK-based health platform. Orders ship from the UK.

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.