5-HTP helps support mood, sleep, and appetite by giving your brain a direct serotonin precursor, helping you feel steadier, sleep sounder, and manage cravings more effectively. Lamberts is a trusted UK based brand known for its science led, purity first formulations and strict quality standards. The tablets use Griffonia simplicifolia seed extract to deliver the 5-HTP, and they're suitable for vegetarians.

Available Sizes & Variants:

60 Tabs - convenient daily supply for steady use

Benefits & Features:

• Supports mood via a direct serotonin precursor.
• Promotes restful sleep when taken as part of your evening routine.
• Supports healthy appetite balance as you go about your day.
• Manufactured in the UK to pharmaceutical standards, these tablets are designed for daily use and careful potency control, ensuring you receive reliable, high quality natural supplements.
• Suitable for vegetarians and free from gluten, lactose and common allergens.

Lamberts has built a reputation for science led, purity first formulations. This 5-HTP product is produced in the UK to pharmaceutical GMP standards, with Griffonia simplicifolia seed extract providing the active component. The brand emphasises purity and careful sourcing, and the formula is designed to fit vegetarians while avoiding common allergens. The result sits well within natural supplements routines, supporting mood, sleep, and appetite as part of a balanced daily pattern.

L-5-Hydroxytrytophan, (natural extract from the seeds of Griffonia simplicifolia), DiCalcium Phosphate, Calcium Carbonate, Cellulose, Tablet Coating (Hydroxypropyl Methylcellulose, Colour: Titanium Dioxide, Glycerin), Silicon Dioxide, Stearic Acid, Magnesium Stearate.

• GTIN: 5055148404383
• Manufacturer: Lamberts
• Categories: 5-HTP Supplements, Tablets & CapsulesLambertsNew ArrivalsSleep & Relaxation SupplementsSupplements for Anxiety
• 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 up to 3 tablets daily, either 30 minutes before meals or bedtime. Begin with one tablet and increase if needed. For optimal results, use 5-HTP for up to 3 months. Take one capsule per day\, or as directed by your healthcare practitioner.

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

The Active Ingredient Is: 5-HTP

5-HTP is a direct precursor to serotonin, a neurotransmitter involved in mood regulation and sleep and appetite balance.

This form is sourced from Griffonia simplicifolia seeds and supplied as a plant-derived extract for supplementation.

What Does 5-HTP Do?

5-HTP helps maintain normal serotonin availability, which can support mood regulation and sleep quality and appetite control. This function is in line with EFSA guidance on serotonin pathways and brain function.

Studies suggest that 5-HTP is converted to serotonin in the body, contributing to overall neurotransmitter balance that supports daily functioning.

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

Lamberts is recognised for its evidence-based formulation method and commitment to purity, making Lamberts 5-HTP a natural fit for Welzo's standards. The label is a reliable UK-based maker known for scientific rigour, transparency, and a long-standing reputation as a leading supplier of specialist supplements to practitioners and pharmacists across the UK and beyond. This heritage underpins our trust in their capacity to deliver consistent, high-quality ingredients for this serotonin precursor formula.

Production of Lamberts supplements, including this 5-HTP product, is conducted in the UK to pharma GMP standards, underscoring their focus on safety and quality. The brand emphasises the purity of the 5-HTP use, aligning with our expectations for rigorous product stewardship and traceable sourcing. This level of manufacturing discipline offers third-party validation of reliability and safety, which we recognise in our assessment process. For Welzo, this blend of engineering prowess and clear practices really stood out when we compared brands in the space.

Our endorsement comes from a careful vetting by our expert team of doctors, nurses, and nutritionists and aligns with our ingredient quality and purity standards, ensuring the product meets Welzo's rigorous expectations while staying perfectly suited for its purpose.