NOW Foods L-Tryptophan 500 mg Vegetarian Capsules, 120 Count — Supports Positive Mood & Healthy Sleep

NOW Foods L‑Tryptophan 500 mg veg capsules provide a concentrated source of the essential amino acid L‑tryptophan to support normal serotonin and melatonin production, helping maintain positive mood and healthy sleep patterns when used as directed.

This supplement supplies 500 mg of L‑tryptophan per vegetarian capsule in a 120‑count bottle, offering a convenient way to add this diet‑required amino acid to daily routines. L‑tryptophan cannot be produced by the body and must come from food or supplements; NOW Foods tests each lot to ensure purity and absence of Peak E and microbial contamination. Capsules are suitable for vegetarians and are packaged in the USA by a long‑standing family company.

How can L‑tryptophan fit into my evening routine?

L‑tryptophan is a dietary precursor to melatonin, a molecule associated with normal sleep‑wake rhythms. Taking L‑tryptophan on an empty stomach, with the last dose at bedtime, may support the body's natural sleep processes. Avoid large meals or competing amino acids immediately before dosing to help absorption.

• Suggested use: 1–2 capsules, 2–3 times daily; final dose at bedtime.
• Best taken on an empty stomach for optimal uptake.
• 500 mg per capsule for controlled titration of dose.
• 120 veg capsules provide a multi‑week supply depending on dosing.

What should I know about safety and purity testing?

NOW Foods subjects every lot of L‑tryptophan to testing to confirm it is free of Peak E and microbial contamination, reducing the risk of known contaminants. The product’s manufacturing and quality control follow established industry practices. As with any supplement, consult a healthcare professional if you are pregnant, nursing, taking medications, or managing health conditions.

• Each lot tested for Peak E absence and microbial contaminants.
• Manufactured and packaged in the USA by a family‑owned company since 1968.
• Vegetarian capsules suitable for non‑animal capsule preferences.
• Follow label directions or seek physician guidance for personalized dosing.

Why choose L‑tryptophan over other amino acid supplements?

L‑tryptophan is an essential amino acid that the body cannot synthesize, making dietary intake or supplementation necessary. It specifically supports pathways that lead to serotonin and melatonin, distinct from other amino acids whose roles focus on muscle building or neurotransmitters other than serotonin. If your diet may be low in tryptophan‑rich foods, a measured supplement can fill that gap.

• Essential amino acid — must be obtained via diet or supplement.
• Direct precursor to serotonin and melatonin production pathways.
• Useful when dietary intake of tryptophan is limited.
• Available as a convenient 500 mg veg capsule for flexible dosing.

How should I incorporate this supplement with other medications or supplements?

L‑tryptophan can interact with certain medications and supplements that modulate neurotransmitter systems. To reduce the potential for interactions or adverse effects, discuss combined use with your healthcare provider before starting L‑tryptophan, especially if you take antidepressants, MAO inhibitors, or other supplements affecting serotonin.

• Consult a healthcare professional before combining with prescription drugs.
• Avoid self‑adjusting doses if you are on serotonergic medications.
• Consider timing of other amino acid supplements to prevent competitive uptake.
• Follow label dosing and physician direction for safe use.

Who is this for: NOW Foods L‑Tryptophan 500 mg is aimed at adults seeking a vegetarian supplement to help maintain normal mood balance and support healthy sleep patterns when diet alone may be insufficient. It's appropriate for those who prefer thoroughly tested supplements packaged by an experienced, family‑owned U.S. manufacturer. Not intended for children; consult a healthcare provider for personalized recommendations.

Ingredients

Supplement FactsServing Size:2 Veg CapsulesServings Per Container:60DescriptionAmount per Serving% Daily ValueL-Tryptophan (Free-Form) 1 g (1,000 mg) ** Daily Value not established. **Daily Value not established.Other Ingredients: Hypromellose (cellulose capsule), Rice Flour, Ascorbyl Palmitate and Stearic Acid (vegetable source). Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens. Caution: For adults only. Consult physician if pregnant/nursing, taking medication (especially antidepressants such as SSRIs and MAOIs), or have in a medical condition. May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery. Keep out of reach of children. Natural color variation may occur in this product. Made and quality tested in the USA with globally sourced ingredients. Store in a cool, dry place after opening. Vegetarian/Vegan Family owned since 1968. This bottle is made from 100% PCR (post-consumer recycled) resin.