L-Tryptophan Complete is a mood and sleep support supplement that helps you feel calmer, and sleep more soundly by supporting serotonin production in the brain and boosting overall mood. The formula teams L-tryptophan with B vitamins, curcumin, vitamin C, magnesium and L-lysine to support the body's ability to convert tryptophan into serotonin. Quality and safety matter, so Lidtke makes it in a GMP-certified facility and keeps the formula vegan and non-GMO.

Available Sizes & Variants:

120 capsules - vegan, non-GMO, GMP-certified quality.

Benefits & Features:

• Supports mood and sleep balance by aiding serotonin production in the brain.
• Vegan, non-GMO formula you can rely on.
• Three capsules give you a thoughtful blend including B vitamins, curcumin, magnesium and lysine to help uptake.
• Designed for daily use, it works over time to help calmer mood and better sleep, waking you refreshed and ready for the day.
• Manufactured in a GMP-certified facility with vegan, non-GMO standards you can rely on.

Lidtke's L-Tryptophan Complete sits at the intersection of careful science and trusted craft. The star ingredient, L-tryptophan, comes as USP grade TryptoGold™, paired with B vitamins, curcumin and minerals to support neurochemical balance. The product is vegan and non-GMO and produced in a GMP-certified facility, reflecting the brand's ongoing commitment to purity and safety. Each serving delivers L-tryptophan in a thoughtful blend that researchers have linked to mood and sleep support, and the brand often pairs this range with vitamin d supplement and probiotics.

L-Tryptophan, L-Lysine, Magnesium, Curcumin, Taurine, Calcium ascorbate, Niacinamide, P5P, Riboflavin, Organic lemon peel extract, Folic acid, vegan capsule.

• GTIN: 630610003254
• Manufacturer: Lidtke
• Categories: LidtkeNew ArrivalsTryptophan Supplements
• 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.

Consume three capsules daily, or follow the guidance of a healthcare provider. As a dietary supplement\, take four tablets per day with meals\, or as directed by your health care practitioner.

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

1. Promotes Better Sleep: L-Tryptophan is an essential amino acid that helps to produce serotonin and melatonin, which are hormones that regulate sleep. Taking L-Tryptophan as a supplement can help improve sleep quality and promote a more restful night's sleep.
2. Supports Mental Health: L-Tryptophan is a precursor to serotonin, a neurotransmitter that plays a crucial role in regulating mood and emotions. Supplementing with L-Tryptophan may help alleviate symptoms of depression, anxiety, and other mood disorders by increasing serotonin levels in the brain.

The Active Ingredient Is: L-Tryptophan

L-Tryptophan is an essential amino acid that the body uses to support normal production of serotonin, a brain neurotransmitter involved in regulating mood and sleep.

This formula combines L-Tryptophan with complementary nutrients (B vitamins, curcumin, magnesium and lysine) to support the body’s neurotransmitter balance; the combination may help optimise the utilisation of tryptophan for normal brain function.

What Does L-Tryptophan Do?

L-Tryptophan is involved in the synthesis of serotonin in the brain, which participates in mood, sleep and stress response. NHS guidance notes serotonin plays a role in these functions, while EFSA supports the importance of such biochemical processes in general health.

The formulation also includes B vitamins and magnesium which are involved in supporting neurochemical balance and normal metabolism linked to tryptophan utilisation.

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

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

We picked Lidtke for this supplement because, in our assessment, the brand regularly stood out for its quality and reliability. Lidtke Technologies is recognised for making top‑quality supplements and formulates with premium ingredients, reflecting a clear focus on safety, potency and consumer trust. The manufacturer runs in a GMP‑certified facility, underscoring strong manufacturing standards and a recognised discipline for product integrity. This mix of brand reputation and manufacturing rigour gave us confidence in both the product and its origins.

Our endorsement is strengthened by third‑party validation through their GMP credentials, which align with our own quality expectations. This is why we emphasise Lidtke as a trusted partner for L-Tryptophan Complete, a formulation that benefits from the brand’s well‑established quality framework. This synergy between brand strengths and the product’s ingredient profile supports Welzo’s commitment to safe, well‑manufactured supplements. For a closer look at how we evaluate and verify these standards, see our team of medical experts and our supplement quality standards.