NOW Foods L-Tryptophan powder helps with a relaxed mood and a restful sleep, giving your body the essential amino acid it uses to make serotonin and melatonin. Free-form L-tryptophan is the star ingredient behind mood support and night-time relaxation. NOW Foods has a long-standing commitment to quality, with GMP facilities and strict batch testing to keep impurities at bay.

Available Sizes & Variants:

57 grams L-Tryptophan powder - Great for versatile dosing at home or on the go.

Benefits & Features:

• Delivers mood support with calm focus.
• Free-form L-tryptophan helps the body produce serotonin and melatonin, supporting relaxation and a restful night, especially when taken as part of a calm evening routine.
• GMP manufacturing and batch testing ensure consistent purity and safety across every jar.
• Free from common allergens, non GMO and suitable for vegan and vegetarian diets.
• Mixes easily into drinks or smoothies and can be taken on an empty stomach for daily use, with a note that some users pair it with n acetylcysteine.

NOW Foods L-Tryptophan powder carries a clear quality story, with every batch tested for microbial contamination and the Peak E impurity, along with vegan and non GMO credentials. This brand has built a reputation on transparent testing and reliable sourcing, delivering a consistent product you can trust. Free-form L-tryptophan is the star ingredient, the dietary amino acid that feeds serotonin and melatonin production to support relaxation and restful sleep. It sits comfortably alongside a balanced wellness routine, including helpful companions like a vitamin d supplement and even protein powder for muscle gain, when fits with your health goals.

L-Tryptophan (Free-Form), Cellulose.

• GTIN: 733739002631
• Manufacturer: NOW Foods
• Categories: NOW FoodsTryptophan
• 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 or two 1/4 level teaspoons (approximately 1 g) 2 to 3 times daily on an empty stomach, with the final dose at bedtime, or as directed by your physician. Store in a cool, dry place after opening. For adults only. Consult a physician if pregnant/nursing, taking medication (especially antidepressants such as SSRIs and MAOIs), or have a medical condition. May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery. Keep out of reach of children. Do not eat freshness packet enclosed.

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

The Primary Ingredient Is: L-Tryptophan (Free-Form)

L-Tryptophan is an essential amino acid and a loose-form powder used by the body to produce serotonin and melatonin, which help mood regulation and sleep processes.

This formulation provides loose-form L-tryptophan as the active ingredient, highlighting its role in usual neurotransmitter synthesis and circadian rhythm support.

What Does L-Tryptophan Do?

L-Tryptophan helps with the production of serotonin and melatonin, which are involved in mood balance and sleep regulation. This process relates to normal brain function and sleep guidance, in line with EFSA-backed nutritional functions.

Studies show that more tryptophan in the brain can help support serotonin and melatonin formation, supporting relaxation and quality sleep in adults.

This product isn't designed to diagnose, treat, cure, or prevent any disease.

NOW Foods is our go-to partner for L-Tryptophan Powder because its quality philosophy centres on strict manufacturing controls and transparent testing. Its commitment to GMP compliant facilities and batch-to-batch consistency lines up with Welzo’s standards for safe, reliable supplements, and its Non-GMO, vegan/vegetarian positioning speaks to a broad consumer base looking for clean ingredients. For our team, this brand stands out for its rigorous contaminant testing, including free screening for Peak E and microbial contamination, which reinforces product purity for everyday use. We evaluate brands against our internal benchmarks, and NOW Foods consistently demonstrates solid quality practices that back consumer safety, backed by its stated regulatory compliance stance. our team of medical experts also recognise the thoroughness NOW Foods applies to ensure product integrity, which shows in the standards we enforce. the standards we enforce underpin why this brand offers reliable value to customers.