L-Tyrosine is an amino acid supplement that helps support cognitive resilience under stress and keeps you sharp when pressures rise. Source Naturals brings decades of wellness know-how. Clear ingredient lists back this simple, single ingredient formula. L-Tyrosine is the star ingredient. It supports neurotransmitter production during stress. We exist to help you feel steadier, sharper and more resilient, without fuss. Honestly, it just works.

Available Sizes & Variants:

100 tablets L-Tyrosine - standard daily bottle for ongoing cognitive support.

Benefits & Features:

• Supports stress related cognitive performance.
• Star ingredient L-Tyrosine replenishes dopamine and norepinephrine to help maintain focus.
• Directly links to cognitive resilience during demanding tasks, so you stay sharper when it matters.
• Quality standards and transparent ingredients underpin Source Naturals, giving you confidence in every capsule.
• For anyone juggling tests, deadlines, or long shifts, this daily dose helps replenish stress related neurotransmitters, supporting memory, mental clarity, and steadier mood during demanding cognitive tasks.

Source Naturals has built a reputation for clear, single-ingredient formulas that put quality first. The L-Tyrosine tablet is designed as a straightforward way to support neurotransmitter production when stress spikes, explaining why it can help keep memory and focus sharper during demanding days. The star ingredient is a direct precursor to dopamine, norepinephrine and epinephrine, which helps explain the cognitive resilience customers report. Each batch follows strict quality controls to ensure consistency and purity. Many customers pair it with a vitamin d supplement or probiotics, or even creatine.

Calcium, L-Tyrosine, Dibasic calcium phosphate, sorbitol, stearic acid, colloidal silicon dioxide, magnesium stearate, and modified cellulose gum.

• GTIN: 21078001904
• Manufacturer: Source Naturals
• Categories: L-TyrosineNew ArrivalsSource Naturals
• 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 one tablet each day. Take one capsule per day or as directed.

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

The Active Ingredient Is: L-Tyrosine (L-Tyrosine)

L-Tyrosine is an amino acid that your body uses to support the production of key neurotransmitters and thyroid hormones. This single-ingredient mix centres on this amino acid as the active component.

In this form, the ingredient acts as a direct precursor for dopamine, norepinephrine and epinephrine, which can be depleted during physical or mental stress. This mirrors evidence describing its role in supporting cognitive resilience in demanding situations.

What Does L-Tyrosine Do?

L-Tyrosine helps with the normal production of neurotransmitters involved in mood, stress response and cognitive function. It helps support mental performance and cognitive clarity when the brain faces demanding tasks or stress, as described in the accompanying research context.

The information here references the scientific understanding of this nutrient’s function and its place in normal brain chemistry. This product isn't meant to diagnose, treat, cure, or prevent any disease.

Welzo chose Source Naturals for L-Tyrosine because the brand fits with our strict partner criteria, emphasising clear ingredient presentation and alignment with our supplement sourcing philosophy. This brand’s approach to single-ingredient formulations mirrors the straightforward, transparent product design Welzo seeks when selecting suppliers for cognitive support supplements such as L-Tyrosine.

Source Naturals has a long-standing industry presence that underpins trust and reliability, and our team evaluated the brand during our standard vetting process. This included a thorough review by our expert team of doctors, nurses, and nutritionists to ensure alignment with our ingredient quality and purity standards. Our evaluation confirms that the brand meets Welzo’s safety and quality expectations, and their product is positioned to fit this single-ingredient supplement well.

When it comes to product fit, L-Tyrosine is shown as a direct precursor in a straightforward formulation, which backs our emphasis on clean, well-characterised ingredients. This focus aligns with Source Naturals’ clear product structure and our team’s assessment framework, strengthening why this brand earned Welzo endorsement for this specific supplement.