Doctor's Best LCitrulline Powder boosts nitric oxide production to support healthy blood flow, helping you enjoy clearer pumps during exercise and quicker post workout recovery. This single ingredient formula keeps things simple, with Kyowa Quality L-Citrulline ensuring purity and consistent performance. Our brand heritage means we test for safety and quality, so you can trust each scoop goes where it should.

Benefits & Features:

• Supports steady blood flow for better exercise performance.
• The star ingredient, L-Citrulline, acts as a precursor to nitric oxide, helping your vessels relax and expand, which supports oxygen delivery to muscles during workouts and speeds up recovery after exercise.
• Suitable for daily use and vegan, gluten free and non GMO.
• Kyowa Quality ensures high purity and consistency in every scoop.
• Single ingredient purity means fewer additives and cleaner support for your training.

Doctor's Best has carved out a reputation for clean, single ingredient supplements that stay true to the science. This L-Citrulline powder carries Kyowa Quality, a recognised standard for amino acid supplements purity, helping you trust every scoop. The vegan, gluten free, and non GMO formula fits busy lifestyles while FDA inspected facilities and GMP compliance underline our commitment to safety. Simple, effective support for blood flow, workout performance, and post exercise recovery is what makes this stand out. For those who include creatine in their routine, this product pairs well with other amino acid supplements to maximise results without extra clutter.

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

L-Citrulline is an amino acid used by the body to support normal blood flow and muscle recovery processes.

This powder provides a single-ingredient formulation in a pure form, with Kyowa Quality ensuring high purity and consistency in amino acid production.

What Does L-Citrulline Do?

L-Citrulline is involved in increasing nitric oxide production, which helps to support vascular tone and blood flow to muscles and organs. It also serves as a precursor to L-Arginine, contributing to pathways that support exercise performance and post-exercise recovery.

These functions align with normal physiological processes that support circulatory health and physical performance, with the nutrient working alongside other body systems to optimise oxygen delivery and nutrient transport.

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

Doctor's Best is our trusted choice for L-Citrulline because the brand is renowned for purity and consistency through Kyowa Quality L-Citrulline per serving, which sets a high standard for amino acid manufacturing. This foundation supports Welzo’s commitment to brand credibility, reliability and rigorous product creation. Our team evaluates manufacturers against clear criteria, including production standards and ingredient integrity, and Doctor's Best aligns with these priorities while presenting a clean, single‑ingredient formula that is non-GMO, gluten‑free, soy‑free and vegan. For transparency on quality, this brand is associated with GMP‑aligned practices and a reputation for internal quality control, which reinforces safety and consistency in every batch. This brand stands out when compared with alternatives due to its focused approach and reputation for pure amino acid products. This product fits perfectly with Doctor's Best emphasis on straightforward, well‑characterised ingredients to support the intended purpose. This brand was evaluated by our medical team for compliance with how we verify ingredient quality.