USN QHUSH Black is a high-stimulation pre-workout that powers sessions with strong energy, focused drive and boosted muscular performance. Core ingredients such as citrulline malate boost blood flow for bigger pumps, and caffeine and theanine sharpen focus. USN remains a trusted name in sports nutrition, and the formula is built to strict quality standards. Dr. Pérez-Guisado from the University of Jaén found citrulline malate enhances endurance.

Available Sizes & Variants:

220g powder – handy size for home workouts and easy dosing.

Benefits & Features:

• Feel energised before training for longer sessions.
• Caffeine paired with L-theanine helps sharper focus and a smoother energy, so you stay on task without the jitters during tough sets and mid-session moves.
• L-Citrulline Malate enhances blood flow for bigger pumps and quicker nutrient delivery during sessions.
• Beta-alanine helps sustain high intensity, supporting performance through the later parts of workouts.
• Vitamins B3, B6 and B12 back energy metabolism so fatigue sets in later and you can train with steadier momentum through longer sessions without dropping effort mid workout.

USN has long stood as a trusted name in sports nutrition, delivering high quality products that athletes rely on. The Black formula pairs a high dose of citrulline malate and beta alanine for endurance and buffering, with caffeine and theanine for crisp focus and smooth energy. The blend is designed for rapid absorption, aided by black pepper extract, and it’s a popular choice for athletes who sometimes add protein powder or collagen peptides powder to their regime for overall daily nutrition. Dr. Pérez-Guisado from the University of Jaén found citrulline malate enhances endurance.

L-citrulline-DL-malate (2:1); beta-alanine; polydextrose; L-arginine HCl; anti-caking agents:silicon dioxide, calcium silicate; caffeine; potassium bicarbonate; L-theanine from green tea leaf extract(Camellia sinensis (L.) Kuntze); flavouring; natural flavour; sweeteners: acesulfame-K, sucralose; vitaminB3 (nicotinamide); trimagnesium citrate; colorant: beetroot red (Beta vulgaris); black pepper extract (Pipernigrum); vitamin B6 (pyridoxine HCl); vitamin B12 (cyanocobalamin).

• GTIN: 6009544952923
• Manufacturer: USN
• Size: Frosted Lemon
• Categories: Best SellersBodybuilding SupplementsNew ArrivalsNew In Supplements & VitaminsSports SupplementsSubscribe & Save Products
• 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.

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

The Active Ingredient Is: L-Citrulline Malate

L-Citrulline Malate is a non-essential amino acid mix that helps with metabolic processes tied to blood flow and stamina. This form blends citrulline with malate for better bioavailability.

This ingredient is often sourced as a supplement-grade amino acid compound used to support athletic performance and energy routes during training.

What Does L-Citrulline Malate Do?

L-Citrulline Malate participates in nitric oxide production, which can help sustain blood flow and stamina during workouts. Studies suggest longer time to exhaustion and quicker recovery with this ingredient when paired with athletic training.

Dr. Pérez-Guisado from the university found that citrulline malate can boost vasodilation and nutrient delivery, supporting performance‑related physiology in active folks.

*This product is not intended to diagnose, treat, cure, or prevent any disease.

Carbohydrates:0.4g

USN is a trusted name in sports nutrition, recognised for delivering high stimulus formulations designed to support intense training sessions. This brand’s track record in the category gives us confidence in their ability to provide consistent quality and reliable performance across pre‑workout products, and it helps us offer you a dependable option when you prioritise energy, focus and endurance before training. USN QHUSH Black specifically aligns with this reputation by pairing a multi‑ingredient complex that supports focused energy and muscular performance, including a stimulant blend that is buffered with elements like L‑theanine to support clearer focus during workouts. Our evaluation process highlighted USN’s approach to product integrity and formulation clarity, which matters when pairing a brand with rigorous in‑gym demands. For reassurance on how we assess quality, our team has reviewed USN against our criteria and findings from our expert team of doctors, nurses, and nutritionists. This collaboration is part of our commitment to safety and efficacy our expert team of doctors, nurses, and nutritionists and our quality assurance criteria.