Doctor's Best L-Tyrosine is a brain transmitter support supplement that helps maintain mental clarity and focus under stress, supporting alertness when tasks demand sustained attention. Powered by a solid dose of L-tyrosine per capsule, it targets amino acids that fuel dopamine, adrenaline and noradrenaline to keep you on your toes. The brand is known for rigorous quality standards and transparent, simple formulas. This heritage helps you trust a brand that keeps cognitive support straightforward.

Available Sizes & Variants:

120 vegetarian capsules - convenient daily dosing for ongoing support.

Benefits & Features:

• Supports mental clarity during demanding tasks.
• L-Tyrosine acts as a neurotransmitter precursor, helping maintain alertness and focus when stress rises.
• Designed for daily use to support cognitive function through the day.
• Peace of mind comes from a simple, vegetarian capsule that delivers a clean, pure L-tyrosine dose, aimed at preserving cognitive sharpness during exams, deadlines, and long meetings.
• Backed by Doctor's Best quality standards, this capsule delivers reliable, consistent support you can trust daily.

Doctor's Best L-Tyrosine captures the brand's heritage of science-led, clean formulations. The star ingredient acts as a precursor to dopamine, adrenaline, and noradrenaline, helping support mood, cognitive function, and stress resilience. Our approach is simple and targeted, with a vegetarian capsule built for daily use and reliable purity. Some customers explore cognitive support stacks that include n acetylcysteine alongside L-tyrosine, but this product keeps the focus firmly on one proven pathway.

Tyrosine (L-Tyrosine), Tyrosine (L-Tyrosine)

• GTIN: 753950003163
• Manufacturer: Doctor's Best
• Categories: Doctor's BestL-Tyrosine
• 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.

Take 1 capsule daily between meals, or as recommended by a nutritionally informed physician. Store in a cool, dry place. Warnings: Consult your doctor before starting any exercise or nutritional supplement program or before using this product during pregnancy or if you have a serious medical condition.

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

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: L-Tyrosine

L-Tyrosine is an amino acid that serves as a building block for brain neurotransmitters, thyroid hormones and melanin, supporting normal cognitive and metabolic functions.

This form provides pure L-Tyrosine in a vegetarian capsule, a straightforward delivery of the amino acid without additional active ingredients.

What Does L-Tyrosine Do?

L-Tyrosine acts as a precursor for dopamine, adrenaline and noradrenaline, which helps support normal mood, cognitive performance and stress responses as part of typical brain function.

It also supports the production of thyroid hormones and melanin, contributing to metabolic and pigmentary processes as described in research on amino acid function.

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

Doctor's Best is the brand we picked as our partner for L-Tyrosine because their formulation really shows a clear, focused way of making high-purity supplements. The product gives L-tyrosine in a vegetarian capsule, with the aim of a straightforward, single-ingredient presentation that fits Welzo's emphasis on transparent, easy-to-audit formulations.

This brand’s commitment to clean, well-defined ingredients and its proven ability to produce a high-quality, dedicated amino acid product backs up our quality expectations. Our team compared Doctor's Best against our ingredient quality and purity standards and with Welzo's medical specialists to confirm suitability for this category. You can learn more about the collaborative review process from Welzo's healthcare professionals.

In choosing Doctor's Best, we prioritise a partner with a practical, science-driven approach to supplement manufacturing, making sure customers get a well-targeted product with clear sourcing and manufacturing focus. This alignment supports a reliable, consistent experience for our customers seeking brain transmitter support and cognitive health backing.