Amino Complex Lemon is a powder supplement, basically a convenient pick on the go, that helps lean muscle growth and quicker recovery, using a clinically validated mix of essential amino acids and branched chain amino acids. Leucine sits at the centre of this blend, helping to promote muscle protein synthesis and support post-exercise recovery. Thorne Research backed by rigorous quality control and NSF Certified for Sport status for extra peace of mind.

Available Sizes & Variants:

231 g lemon amino complex – great for daily use and steady supplementation.

Benefits & Features:

• Helps lean muscle growth after workouts.
• Quicker recovery helps you train consistently and feel less sore.
• Leucine-rich amino acids support muscle protein synthesis after workouts, helping lean mass growth while the broader essential amino acids and branched-chain amino acids blend supports recovery.
• NSF Certified for Sport status means third-party testing and purity you can trust.
• Manufactured in Thorne's state-of-the-art facilities with GMP oversight, Amino Complex Lemon blends precise dosing with natural lemon flavour and stevia for a pleasant everyday amino acid supplement.

Behind Amino Complex Lemon lies Thorne Research's long-standing commitment to quality. The clinically validated blend of essential amino acids and branched-chain amino acids is dosed at 7.7 g per scoop to support muscle protein synthesis and quick recovery. Manufactured in state-of-the-art facilities with GMP oversight and NSF Certified for Sport, the product undergoes rigorous third-party testing to ensure label accuracy and purity. All of this helps you feel confident every time you reach for your amino acid supplements.

Other Ingredients: Citric Acid, Flavors, Stevia Extract, Turmeric Powder

• GTIN: 693749003663
• Manufacturer: Thorne
• Categories: BCAA Powders, Tablets & Drinks (Branch Chain Amino Acids)Intra Workout SupplementsNew ArrivalsPopular Supplement BrandsThorne Supplements
• 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.

Mix one scoop with at least 8 ounces of water, one to two times daily, or as directed by your healthcare professional. Completely dissolve in mouth one (1) lozenge every 2 wakeful hours\, not to exceed 8 lozenges per day\, or as recommended by a healthcare practitioner.
Do not use for more than 3 consecutive days.
Do not chew or swallow lozenge.
May cause nausea if taken on empty stomach.

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

The Active Ingredient Is: Leucine (L-Leucine)

Leucine is an essential amino acid used by the body for growth and tissue maintenance. It is a fundamental building block of protein and participates in normal metabolic processes that support muscle tissue turnover.

This formula presents Leucine as part of a broader amino acid blend and is commonly supplied in free-form L-Leucine to support its role in protein synthesis. This product also includes other amino acids that help support overall amino acid availability for normal physiological function.

What Does Leucine Do?

Leucine participates in muscle protein synthesis and energy production processes as part of a balanced essential amino acid profile. Scientific evidence suggests that adequate leucine intake supports muscle health and recovery in the context of regular activity.

Research indicates that branched-chain and essential amino acids can support lean muscle maintenance and post-exercise recovery, with leucine playing a key role in activating protein synthesis. This supports normal muscle function and metabolism, in line with EFSA guidance.

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

Thorne Research is the brand we decided on for Amino Complex Lemon because of its long-standing reputation for science-led and quality-focused supplementation. Thorne has built a heritage of rigorous manufacturing excellence in state-of-the-art facilities and earned NSF Certified for Sport status, reflecting careful product oversight and strong third-party verification. This combination underpins a truly trusted foundation for athletes and everyday users alike, reinforced by GMP-compliant processes and a clear emphasis on label accuracy and safety.

Our vetting criteria merge brand credibility, testing protocols, and manufacturing standards. Thorne’s commitment to third-party verification and thorough quality control fits with our standards, which you can explore through our ingredient quality and purity standards and via our team of medical experts.

This brand and product pairing is a natural fit for Welzo because Amino Complex Lemon relies on a clinically validated EAA/BCAA blend formulated for purity and performance, with Thorne’s preparation in facilities designed to guard against contamination and ensure ingredient accuracy. This makes Thorne Research our preferred partner for delivering high-quality amino acid support through a trusted, tested product.