L-Tyrosine is a dietary supplement that helps cognitive performance and resilience to stress by delivering a highly pure, easy to absorb form of the amino acid essential for neurotransmitter synthesis. The star ingredient, L-tyrosine, is a direct precursor to dopamine, norepinephrine and epinephrine, helping sustain focus and mood during demanding tasks. Thorne's commitment to quality shines through in stringent testing, NSF certification, and a long history of trusted, science-driven supplements.

Available Sizes & Variants:

90 Veggie Caps - convenient daily dose in plant based capsules.

Benefits & Features:

• Helps you stay focused and clear headed during demanding tasks.
• Aids mood and stress response by supplying dopamine and adrenaline precursors.
• Plant based capsules make daily use easy and align with perfect amino electrolytes in our broader range.
• Thorne's commitment to high purity and thorough testing means you get reliable strength and consistent potency every time you reach for L-Tyrosine on demanding days.
• Aimed at those seeking amino acid supplements, it helps support cognitive endurance when life gets busy.

Thorne, founded in 1984, has built a reputation for science led, high purity supplements. Among l tyrosine supplements, this simple capsule delivers pure L-tyrosine with minimal excipients and is backed by four rounds of in house testing and NSF certification. The brand’s heritage includes collaborations with Mayo Clinic and Columbia University, underscoring its clinical relevance. It fits into a daily routine for cognitive focus, and it complements the broader idea of perfect amino electrolytes in the range.

L-Tyrosine, Hypromellose (derived from cellulose) capsule, Leucine, Silicon Dioxide.

• GTIN: 693749514039
• Manufacturer: Thorne
• Categories: L-TyrosineNew 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.

Consume one capsule three times a day or as advised by your healthcare provider. Suggested Use: Two (2) capsules per day.

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

1. L-Tyrosine is an essential amino acid that plays a crucial role in the production of neurotransmitters in the brain, which can help improve cognitive function and mood regulation.
2. This supplement can also support the production of thyroid hormones, which can aid in proper metabolism and energy levels.

The Active Ingredient Is: L-Tyrosine

L-Tyrosine is an amino acid, basically a direct precursor to the catecholamine neurotransmitters dopamine, norepinephrine and epinephrine, which are involved in normal brain function related to mood, attention and stress responses.

This form provides a high-purity, bioavailable supply of L-Tyrosine, derived from an amino acid source suitable for dietary supplements.

What Does L-Tyrosine Do?

Dr. Jongkees of the University of Groningen found that L-Tyrosine supplementation can support cognitive performance in demanding or stressful situations by supporting neurotransmitter synthesis during stress.

In line with EFSA and NHS perspectives on nutrient function, L-Tyrosine contributes to normal brain function by aiding in the production of catecholamines that help maintain mental performance under pressure.

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

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

Thorne Research is our chosen partner for L-Tyrosine because the brand consistently demonstrates rigorous manufacturing standards and strong industry credibility. Thorne’s facility is NSF Certified and the company holds an A rating from Australia’s Therapeutic Goods Administration, underscoring their commitment to quality and regulatory compliance. The brand’s reputation as a premium supplement manufacturer is reinforced by its long-standing collaborations with institutions like the NIH, Mayo Clinic and Columbia University, and their science‑backed, bioavailable formulations have earned practitioner trust.

Our vetting criteria emphasise brand history, certifications, testing protocols and manufacturing philosophy. Thorne conducts four rounds of in‑house testing across raw ingredients, in‑process, finished product and stability, ensuring identity, potency and purity. Their dedication to purity is aligned with Welzo’s standards, and their clear focus on minimal excipients supports product quality for L‑Tyrosine capsules. This brand was evaluated by Welzo's healthcare professionals for compliance with our quality certification process.

Choosing Thorne means customers receive a product built on manufacturing excellence and a strong heritage of trust, with ongoing commitment to safety and quality differentiating them from competitors.