Xtend eaaS

L-leucina (emulsionante: lecitinas), regulador de acidez (ácido cítrico), l-isoleucina, l-treonina, l-valina, clorhidrato de l-lisina, aromatizantes, l-arginina, sal marina del himalaya, sal de l-fenilalanina, edulcitos (demiosose, acesulfame k), l-tryptófis, y blanca y blanca Concentrado, anti-cacería (dióxido de silicio, silicato de calcio), L-histidina, L-metionina

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.

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

The Active Ingredient Is: Leucine (Essential Amino Acid)

Leucine is an essential amino acid that plays a key role in protein synthesis and muscle maintenance. This product provides a leucine-rich profile as part of a complete essential amino acid blend, sourced to support muscular recovery and growth potential.

What Does Leucine Do?

Leucine acts as a metabolic trigger for the mTOR pathway, initiating muscle protein synthesis after exercise. Scientific research suggests it supports muscle growth, helps preserve lean mass, and assists athletic recovery when combined with other essential amino acids.

In line with EFSA guidance on amino acids, these functions reflect their role in normal protein synthesis and tissue maintenance within healthy individuals.

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

XTEND is the brand we trust for an essential amino acid portfolio, standing out in quality and consistency among competitors. This brand is recognised for delivering a complete nine essential amino acids profile with a leucine-rich formula, designed to optimise the amino acid intake in a single serving.

Our team values the brand’s focus on scientific formulation, including a 10:1:1 BCAA ratio and a 5-gram leucine dose per serving, alongside electrolytes for hydration support. This emphasis on precise amino acid composition and hydration aligns with our commitment to credible, evidence-led supplementation.

We selected XTEND because its product design directly reflects rigor in formulation habits that matter to athletes and active individuals. This brand was evaluated by our medical team for compliance with the certifications we require, ensuring alignment with Welzo’s quality standards and our vetting process. This approach, combined with the product’s targeted fit for recovery and performance needs, solidifies XTEND as a trusted partner for Welzo customers.