---
product_id: 3703635
title: "Supplements, L-Tryptophan 500 mg, Supports Relaxation*, 120 Veg Caps"
brand: "now"
price: "¥6881"
currency: JPY
in_stock: true
reviews_count: 13
category: "Now"
url: https://www.desertcart.jp/products/3703635-supplements-l-tryptophan-500-mg-supports-relaxation-120-veg-caps
store_origin: JP
region: Japan
---

# 500 mg pure L-Tryptophan per capsule Supports restful sleep & mood balance Tested free of Peak E & microbial contamination Supplements, L-Tryptophan 500 mg, Supports Relaxation*, 120 Veg Caps

**Brand:** now
**Price:** ¥6881
**Availability:** ✅ In Stock

## Summary

> 💡 Elevate your mood & sleep game — because you deserve to thrive!

## Quick Answers

- **What is this?** Supplements, L-Tryptophan 500 mg, Supports Relaxation*, 120 Veg Caps by now
- **How much does it cost?** ¥6881 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/3703635-supplements-l-tryptophan-500-mg-supports-relaxation-120-veg-caps)

## Best For

- now enthusiasts

## Why This Product

- Trusted now brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleep Like a Pro:** Fall asleep faster and wake up refreshed without grogginess*
- • **Legacy of Quality:** Crafted by a family-owned brand since 1968, made in the USA
- • **Vegan & Allergen-Free:** 100% vegetarian capsules, free from dairy, soy, nuts, and GMOs
- • **Clean & Trusted Formula:** Every batch rigorously tested for purity and safety
- • **Mood Mastery in a Capsule:** Boost serotonin & melatonin naturally for a positive mindset*

## Overview

NOW Foods L-Tryptophan 500 mg delivers a potent, vegan-friendly amino acid essential for serotonin and melatonin production, supporting mood enhancement and restful sleep. Each capsule is rigorously tested to ensure purity, free from common allergens and contaminants, making it a trusted choice for professionals seeking natural mental wellness and recovery. Packaged in the USA by a family-owned company with over 50 years of quality assurance.

## Description

Encourages Positive Mood* Promotes Restful Sleep* L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet.* L-Tryptophan is critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function.* Every lot of NOW® L-Tryptophan is tested to be free of Peak E and microbial contamination. Natural color variation may occur in this product.

Review: Life-Changing Supplement - I’ve been using NOW Foods L-Tryptophan 500 mg for a few months, and I am truly amazed by the difference it’s made in my daily life. I’ve struggled with anxiety and irritability symptoms for years, and this supplement has been a game-changer. Since I started taking it, I’ve noticed a significant reduction in anxiety and mood swings. I feel more relaxed, focused, and less easily frustrated throughout the day. What I love most is that it doesn’t cause any drowsiness or side effects – just a natural sense of calm and well-being. The capsules are easy to take, and the 120-count bottle lasts a long time, making it a great value. If you're dealing with similar symptoms, I highly recommend giving this a try – it’s been incredibly helpful for my mental health!
Review: Awesome sleep aid - I recently added L-Tryptophan to my sleeping aid cocktail, and it's been amazing. The main benefit I've noticed since I started taking L-Tryptophan is when I wake up now (be it after 4, 6, or 8 hours of sleep) I feel instantly awake and ready to go. It's interesting to feel fully refreshed after 4hrs of sleep, something I haven't felt since I was younger. Although it may not last throughout the day, but I believe it's a good indication of how well this medication is working. The addition of L-Tryptophan also makes me more tired and helps me actually fall asleep moreso then any one thing I take. I've suffered from insomnia since I can remember, even if I want to sleep and am trying - my brain is simply too active to let me sleep at night. I took ambien for a short time and it was one of the worst medication experiences I've had. So have been experimenting with different combinations of OTC sleep aids the past couple years. My currently nightly ritual (unless I'm somehow tired already) is : 1-2x Nature's Bounty Melatonin, 3 mg, 240 Tablets 1x Doctor's Best Suntheanine L-Theanine (150mg) Vegetable Capsules, 90-Count 1x Now Foods L-tryptophan 1000mg, Tablets, 60-Count (or two of these) 1x Nature's Way Chamomile Flowers , 350 mg, 100 Capsules (sometimes) 1x NOW Foods - 5-HTP 200 mg - 120 - VegCap It may seem like a lot, but it beats ambien, or any other sleeping medication I've taken. I am generally a very light sleeper with lucid dreams, and this combination has not effected that any. It just simply calms my brain down enough to let me fall asleep. When I wake up I feel fully refreshed and ready to go, no groggy feeling you get with a lot of other sleep aids.

## Features

- An essential amino acid that is not synthesized by the body and must be obtained by diet or supplementation.
- Critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function*
- Every lot tested to be free of Peak E and microbial contamination
- Take 1-2 capsules 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician
- Packaged in the USA by a family owned and operated company since 1968.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0019LWV56 |
| Age Range Description | Adult |
| Allergen Information | Dairy Free, Egg Free, Non-GMO, Nut Free, Soy Free |
| Best Sellers Rank | #11,116 in Health & Household ( See Top 100 in Health & Household ) #106 in Sleep & Snoring Aids #125 in Herbal & Nutritional Sleep Supplements #1,087 in Sales & Deals |
| Brand | NOW |
| Brand Name | NOW |
| Color | Cream |
| Container Type | Bottle |
| Customer Reviews | 4.5 out of 5 stars 5,782 Reviews |
| Diet Type | Halal, Kosher, Vegan |
| Dosage Form | Capsule |
| Flavor | Unflavored |
| Global Trade Identification Number | 00733739001672 |
| Item Dimensions | 2.7 x 2.7 x 4.75 inches |
| Item Form | Capsule |
| Item Weight | 0.12 kg |
| Manufacturer | NOW |
| Manufacturer Part Number | 0167 |
| Material Features | Vegetarian |
| Model Name | L-Tryptophan 500 mg, Encourages Positive Mood*, Supports Relaxation* |
| Model Number | 0167 |
| Number of Items | 1 |
| Primary Supplement Type | multivitamin |
| Product Benefits | Sleep Support, Stress Relief |
| Recommended Uses For Product | Sleep & Mood Support |
| Total Servings Per Container | 60 |
| UPC | 733739001672 |
| Unit Count | 120 Count |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** NOW
- **Diet Type:** Halal, Kosher, Vegan
- **Flavor:** Unflavored
- **Item Form:** Capsule
- **Item Weight:** 0.12 kg
- **Item dimensions L x W x H:** 2.7 x 2.7 x 4.75 inches
- **Primary Supplement Type:** multivitamin
- **Product Benefits:** Sleep Support, Stress Relief
- **Unit Count:** 120 Count

## Images

![Supplements, L-Tryptophan 500 mg, Supports Relaxation*, 120 Veg Caps - Image 1](https://m.media-amazon.com/images/I/71cs2OrNIJL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What is the difference between this product and the L -Tryptophan that was removed from store shelves years ago?**
A: I was diagnosed with EMS in 1989.  I was one of the lucky ones and fully recovered. There was no cure. The “treatment” was discontinued use of L-tryptophan, steroids and 2 yrs of PT for me. Someone said EMS was treated with L-tryptophan?  Ridiculous.  We were being told by physicians to double up our dosages BEFORE they knew that was the root cause. I was sent to every specialist because every system in the body was impacted. 
Big pharma may have upped their game on regulating their manufacturing standards. But Supplements like L-Tryptophan do not fall under big pharmaceutical. They are not regulated with the same standards. Yes, do your HW. And no, this was not part of some crazy Prozac conspiracy plan.

**Q: What's the difference with 5-HTP?**
A: 5-HTP is converted in the body from L-Trytophan (also, can be made from the seeds of a particular African plant). It can have more wide-ranging side-effects (beyond brain/mental issues), so be careful with it when taking directly. When taken with other herbs, effects can amplify, so be careful. Always check with your medical doctor before taking 5-HTP. 5-HTP gets converted to serotonin by the liver. 5-HTP is not sold over-the-counter in all countries of the world. L-Trytophan, as a naturally occurring amino acid,  is commonly viewed as the safer alternative.

**Q: How big are the capsules?  I bought the other brand on amazon and they are too big.I have a problem with my esophougus and it got stuck and made be sick for a day. Thanks**
A: I have trouble swallowing pills, but there's a positive with this when it comes to ANY amino acids: They are best taken by opening the capsule into 1-2 oz of water and swishing in your mouth before swallowing. It allows them to absorb better AND work faster.

**Q: is the tryptophane from China??**
A: According to a message I got back from NOW:"The tryptophan is produced by fermentation of non-GMO corn in China; then is granulated, encapsulated, and bottled in the USA."

## Customer Reviews

### ⭐⭐⭐⭐⭐ Life-Changing Supplement
*by M***. on January 24, 2025*

I’ve been using NOW Foods L-Tryptophan 500 mg for a few months, and I am truly amazed by the difference it’s made in my daily life. I’ve struggled with anxiety and irritability symptoms for years, and this supplement has been a game-changer. Since I started taking it, I’ve noticed a significant reduction in anxiety and mood swings. I feel more relaxed, focused, and less easily frustrated throughout the day. What I love most is that it doesn’t cause any drowsiness or side effects – just a natural sense of calm and well-being. The capsules are easy to take, and the 120-count bottle lasts a long time, making it a great value. If you're dealing with similar symptoms, I highly recommend giving this a try – it’s been incredibly helpful for my mental health!

### ⭐⭐⭐⭐⭐ Awesome sleep aid
*by C***E on October 23, 2013*

I recently added L-Tryptophan to my sleeping aid cocktail, and it's been amazing. The main benefit I've noticed since I started taking L-Tryptophan is when I wake up now (be it after 4, 6, or 8 hours of sleep) I feel instantly awake and ready to go. It's interesting to feel fully refreshed after 4hrs of sleep, something I haven't felt since I was younger. Although it may not last throughout the day, but I believe it's a good indication of how well this medication is working. The addition of L-Tryptophan also makes me more tired and helps me actually fall asleep moreso then any one thing I take. I've suffered from insomnia since I can remember, even if I want to sleep and am trying - my brain is simply too active to let me sleep at night. I took ambien for a short time and it was one of the worst medication experiences I've had. So have been experimenting with different combinations of OTC sleep aids the past couple years. My currently nightly ritual (unless I'm somehow tired already) is : 1-2x Nature's Bounty Melatonin, 3 mg, 240 Tablets 1x Doctor's Best Suntheanine L-Theanine (150mg) Vegetable Capsules, 90-Count 1x Now Foods L-tryptophan 1000mg, Tablets, 60-Count (or two of these) 1x Nature's Way Chamomile Flowers , 350 mg, 100 Capsules (sometimes) 1x NOW Foods - 5-HTP 200 mg - 120 - VegCap It may seem like a lot, but it beats ambien, or any other sleeping medication I've taken. I am generally a very light sleeper with lucid dreams, and this combination has not effected that any. It just simply calms my brain down enough to let me fall asleep. When I wake up I feel fully refreshed and ready to go, no groggy feeling you get with a lot of other sleep aids.

### ⭐⭐⭐⭐⭐ Wow! Game Changer.
*by L***E on June 21, 2023*

I had no idea I might be low on some amino acids, nor that supplementing could be so helpful. My brother recommended them for help sleeping and mood support, and they’ve delivered! Both my mood and sleep have improved so much. I feel balanced in a way I maybe never have. I decided to take these in the evening and use l-tyrosine in the daytime. The combination has been fabulous! I take about 500ml of each. Sometimes I take 1000 mg of the l-tryptophan and gosh I sleep soooo well. I wouldn’t say these are wholly sleep inducing, but they do help me sleep, fall asleep faster, and feel well rested when I wake — something I’ve never really experienced. They don’t make me groggy, and I wake up so much less cranky! For the first week I could literally feel the relaxation in my whole being. That has worn off a bit, but I think I just got used to feeling good and relaxed so it’s not such a stark contrast anymore. I’ve suffered with depression, lethargy, and general malaise for most of my life. I wouldn’t say these are an antidepressant, per se, but adding them with the l-tyrosine has improved my mood a TON! I think I was very low on these amino acids and just didn’t know it. I’m mostly vegetarian, but even when I do eat meat, I don’t eat much; I’ve never eaten seafood and recently stopped eating eggs, so I’m sure I wasn’t getting enough amino acids. Plus, food is just low nutrition these days and we all should think about ensuring we get what our body needs to maintain a good state of mind and energy. I genuinely believe these could help others. If you struggle with sleep and low mood, I’d certainly give these a shot. Maybe even try l-tyrosine in the day to see what works for you. I think it’s important to take them on an empty stomach so make sure to do that or else the effects may not be very apparent, as they compete with what you’re taking in from your meals.

## Frequently Bought Together

- NOW Foods Supplements, L-Tryptophan 500 mg, Encourages Positive Mood*, Supports Relaxation*, 120 Veg Capsules
- NOW Foods Supplements, L-Tyrosine 500 mg, Supports Mental Alertness*, Neurotransmitter Support*, 120 Capsules
- NOW Foods Supplements, 5-HTP (5-hydroxytryptophan) 100 mg, Neurotransmitter Support*, 120 Veg Capsules

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-11*