L-Tyrosine is a brain-boosting supplement built to help support mental alertness and resilience under stress, helping you stay sharp when cognitive demand is high. Its active ingredient supports neurotransmitter production and thyroxine pathways, helping maintain focus and energy when cognitive demand is high. It’s vegetarian-friendly and gluten free, aligning with our high standards for clean, reliable supplements. Backed by years of science and a commitment to quality.

Available Sizes & Variants:

120 vegetarian capsules – convenient monthly supply for daily use.

Benefits & Features:

• Supports focus during demanding tasks.
• Promotes mental alertness during stress and complex cognitive work daily.
• Star ingredient guides neurotransmitter production and thyroxine pathways, helping maintain cognitive performance and mood during mentally demanding situations, which is particularly useful for exams, deadlines, and busy workdays.
• Non-GMO and gluten-free ingredients reinforce trust in what you take.
• Designed for daily use with a clean, simple formula that fits into any wellness routine.

Doctor's Best L-Tyrosine stands out for its simple, single-ingredient approach. Each vegetarian capsule contains pure L-Tyrosine with a hypromellose capsule, and inactive ingredients like L-leucine and silicon dioxide, keeping the focus on the star ingredient. The product is Non-GMO and gluten-free, underscoring our commitment to clear, reliable supplements. This is not a vitamin d supplement, but some customers explore broader stacks, including n acetylcysteine, in other wellness lines. Our rigorous quality checks aim to deliver consistent, effective support for daily cognitive function.

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 the body uses to make neurotransmitters and thyroxine, helping to support normal brain function and metabolism. This product uses a vegetarian capsule to deliver L-Tyrosine as the main active ingredient.

In this formulation, L-Tyrosine acts as a precursor for dopamine, norepinephrine, and epinephrine, and also participates in thyroxine production, helping metabolic and cognitive processes under normal conditions.

What Does L-Tyrosine Do?

L-Tyrosine is involved in the production of key brain chemicals that help keep mental alertness and performance during mentally demanding tasks and stress, aligning with information on neurotransmitter roles in cognitive activity. It also contributes to thyroxine synthesis, influencing metabolic rate and energy regulation.

Research and regulatory guidance emphasise normal brain function and metabolic support as relevant roles for this amino acid.

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

Welzo curates brands that show a genuine commitment to ingredient integrity, provenance, and robust product design. Doctor's Best stands out for its focused, single-ingredient formulation, with L-Tyrosine as the sole active ingredient in this product, illustrating a commitment to transparency and simplicity in what you are taking.

The brand’s L-Tyrosine product is non-GMO and gluten-free, which aligns with Welzo’s emphasis on clean ingredient choices and traceable quality. This aligns with our goal of partnering with manufacturers that prioritise purity and straightforward ingredient sourcing. Doctor's Best is evaluated by our expert team of doctors, nurses, and nutritionists for compliance with how we verify ingredient quality, ensuring we only collaborate with brands meeting our high standards.

We chose Doctor's Best for its scientifically grounded approach—L-Tyrosine acts as a precursor for key neurotransmitters and thyroxine pathways, which supports cognitive function under mental demand in line with the provided research facts. This brand’s emphasis on a transparent, single-ingredient profile makes it particularly suited to this supplement. The partnership complements Welzo’s rigorous vetting process and product merit assessment.