£31.95
HR Labs DeFib V3 is a high-potency pre-workout with a multi-phase energy, focus, and pump formula. It includes NO boosters, adaptogens, stimulants, and cognitive enhancers – crafted to support performance across endurance, strength, and mental clarity.
Ingredients (per serving – 1 scoop / 2 scoops)
Citrulline Malate 2:1 – 4,000mg / 8,000mg
Beta-Alanine – 1,600mg / 3,200mg
Betaine Anhydrous (Trimethylglycine) – 1,250mg / 2,500mg
Taurine – 750mg / 1,500mg
PeakO₂™ Mushroom Complex – 500mg / 1,000mg
Acetyl-L-Carnitine – 500mg / 1,000mg
Juniper Berry Extract – 250mg / 500mg
Caffeine Anhydrous – 200mg / 400mg
RhodioPrime™ 6X (Rhodiola extract, 6% Salidroside) – 150mg / 300mg
EnXtra® (Alpinia galanga) – 150mg / 300mg
Mucuna Pruriens Extract (50% L-Dopa) – 100mg / 200mg
AmentoPump™ (20% Amentoflavone) – 75mg / 150mg
AstraGin® (Astragalus & Panax Notoginseng) – 25mg / 50mg
Nutritional Breakdown (per 2 scoop serving – 21g)
Energy: 13kcal
Carbohydrates: 2.6g
Protein: 0.8g
Salt: 0.74g
Suitable for Vegans/Vegetarians?
✅ Yes – Fully vegan-friendly and halal certified. No animal-derived ingredients.
Allergen Information:
Manufactured in a facility handling gluten, egg, soy, and milk.
When it comes to lifting weights, this is a great all-in-one pre-workout!
Some pre-workouts offer stimulatory effects, some pre-workouts give you great pumps, some pre-workouts offer heightened focus – this does all 3!
I don’t often take a stimulant-based pre-workout due to training in the evenings (apart from Sunday when I hit legs) – but when I do it’s a toss-up between this and Strom StimuMax Pro – they both work great!
Who it’s for:
Anyone smashing high-intensity sessions, needing sharp focus and serious legs-up power – weightlifters, CrossFitters, athletes aiming for peak performance.
What it does:
Delivers jaw-dropping pumps via citrulline malate and PeakO₂™, fatigue-fighting amino support with beta-alanine & betaine, laser focus and energy from caffeine, EnXtra®, and Rhodiola, plus versatile stamina thanks to adaptogens and cognitive enhancers.
How I’d use it:
Stir up one scoop with water about 20–30 minutes before training – or go for two scoops if you’re chasing hardcore sessions. Expect to feel mentally zoned-in and physically locked-and-loaded, ready to push every rep and hold every wall shot.
The Science:
Citrulline Malate & Endurance Performance
Study: A narrative review exploring the ergogenic effects of citrulline malate supplementation – particularly its potential to buffer fatigue, enhance nitric oxide pathways, and support endurance and recovery.
Journal of the International Society of Sports Nutrition (Gough et al., 2021)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8571142/
Citrulline malate is associated with improved ammonia clearance, blood flow, and reduced fatigue – backing its inclusion for pump, nitric oxide production, and endurance support in pre-workouts.
PeakO₂® Mushroom Blend Enhances VO₂ max & Power Output
Study: A randomised, placebo-controlled trial assessing 3-week supplementation with the PeakO₂® blend, evaluating its impact on VO₂ max and peak power output in competitive athletes.
PMC (Mount UNC study, 2015)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4594151/
PeakO₂® improved VO₂ max by 4ml/kg/min and increased time to exhaustion by 70 seconds – a significant boost for oxygen utilisation and endurance. Perfectly aligns with DeFib’s oxygen and stamina themes.
