Jarrow Formulas LTryptophan 500mg 60 Veggie Capsules

Other Ingredients - Vegetarian capsule (hydroxypropylmethylcellulose, water), magnesium stearate (vegetable source), cellulose and silicon dioxide.
Free From - No wheat, gluten, soybeans, dairy, egg, fish/shellfish, or peanuts/tree nuts.

United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched 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 14 days in the same original and unopened packaging. Subject to T&C's.

Welzo is a UK-based health platform. Orders ship from the UK.

Consume one capsule on an empty stomach 30 minutes before bedtime with water or fruit juice.

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

The Active Ingredient Is: L-Tryptophan

L-Tryptophan is an essential amino acid that serves as a precursor to the neurotransmitters serotonin and melatonin, supporting normal brain function and sleep regulation.

This form is supplied in a vegan-friendly capsule and is produced via fermentation from vegetable materials, offering a clean source of this amino acid.

What Does L-Tryptophan Do?

L-Tryptophan helps maintain normal neurotransmitter balance by aiding in the production of serotonin and melatonin, which can support mood regulation and sleep processes.

EFSA and NHS guidance recognise the role of this amino acid in normal sleep and mood function; scientific research suggests that higher intake may influence sleep latency and mood in some individuals, with studies referencing serotonin pathways involved in these processes.

Dr. Silber of a UK university found that higher daily intake of L-Tryptophan was associated with improvements in sleep latency in controlled settings.

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

Dietary supplements are not a replacement for a balanced diet. Do not take more than the recommended amount. Keep in a cool, dry area away from light and heat. Ensure they are out of children's reach and view.

Jarrow Formulas is chosen for its science‑led approach to amino acids, backed by a reputation for quality and transparency. This brand operates a GMP‑certified facility and uses fermentation from vegetable materials, aligning with our rigorous manufacturing standards and commitment to purity. Their rigorous batch testing and vegan, non‑GMO, allergen‑free credentials underpin the trust we place in this partnership, and their clear emphasis on consistency across every batch supports our quality promises to customers. This brand stands out in the market for its established reputation in amino acid science and its transparent, quality‑focused manufacturing philosophy, which is why we favour it over alternatives.

Comparatively, Jarrow Formulas’ product strategy is well aligned with the needs of this supplement type, ensuring pharmaceutical‑grade L‑tryptophan capsules that suit our safety and efficacy expectations. Our medical team has evaluated this brand for compliance with the standards we enforce, and we see a strong fit for the British market given their track record and manufacturing excellence. This collaboration reflects Welzo's evidence‑based selection process our medical team and a commitment to high‑quality, reliable supplements the standards we enforce.