---
product_id: 3810651
title: "L-Tryptophan 500mg - 120 Capsules"
brand: "source naturals"
price: "SAR 107"
currency: SAR
in_stock: true
category: "Source Naturals"
url: https://www.desertcart.com.sa/products/3810651-l-tryptophan-500mg-120-capsules
store_origin: SA
region: Saudi Arabia
---

# 500mg pure L-Tryptophan per capsule Supports restful sleep with extra bedtime dose Boosts immunity via kynurenine pathway L-Tryptophan 500mg - 120 Capsules

**Brand:** source naturals
**Price:** SAR 107
**Availability:** ✅ In Stock

## Summary

> 💤 Elevate your nights, empower your days — naturally.

## Quick Answers

- **What is this?** L-Tryptophan 500mg - 120 Capsules by source naturals
- **How much does it cost?** SAR 107 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/3810651-l-tryptophan-500mg-120-capsules)

## Best For

- source naturals enthusiasts

## Why This Product

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

## Key Features

- • **Bedtime Boost:** Extra capsules before sleep for deep, restorative rest
- • **Clean & Pure Formula:** Gluten, soy, dairy, egg, and wheat free for sensitive lifestyles
- • **Premium 500mg Dosage:** Potent amino acid support for mood & relaxation
- • **Triple Daily Capsules:** Optimized timing for sustained calm and wellness
- • **Trusted Quality Since 1982:** cGMP & FDA-compliant manufacturing ensures premium reliability

## Overview

Source Naturals L-Tryptophan 500mg capsules deliver a clinically relevant dose of this essential amino acid to support relaxation, mood balance, and immune health. With a clean, allergen-free formula and decades of trusted manufacturing standards, it’s designed for adults seeking natural, effective sleep and wellness support.

## Description

desertcart.com: Source Naturals, L-Tryptophan 500mg - 120 Capsules | Helps Support Mood, Relaxation, and Sleep : James, Tommy: Health & Household

## Features

- The essential amino acid l-tryptophan helps support relaxation, restful sleep, and positive mood.*
- l-Tryptophan also supports immune functions because it is the body’s precursor to the kynurenines that regulate immunity.
- Suggested Use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take an additional 3 capsules before bed.*
- Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support everyone’s potential to enjoy optimal health.
- Manufactured under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000GFSVS2 |
| Age Range Description | Adult |
| Allergen Information | Dairy Free, Egg Free, Gluten Free, Soy Free, Wheat Free |
| Best Sellers Rank | #35,602 in Health & Household ( See Top 100 in Health & Household ) #377 in Herbal & Nutritional Sleep Supplements #2,280 in Sales & Deals |
| Brand | Source Naturals |
| Brand Name | Source Naturals |
| Color | No Color |
| Container Type | Bottle |
| Customer Reviews | 4.5 out of 5 stars 1,945 Reviews |
| Diet Type | Gluten Free |
| Dosage Form | Capsule |
| Flavor | Unflavored |
| Global Trade Identification Number | 00021078019855 |
| Item Dimensions | 2.51 x 2.51 x 4.6 inches |
| Item Form | Capsule |
| Item Highlight | Helps Support Mood, Relaxation, and Sleep |
| Item Weight | 1.6 ounces |
| Manufacturer | Threshold Enterprises |
| Manufacturer Part Number | SN1985 |
| Material Features | No Artificial Colors |
| Material Type Free | Egg Free, Soy Free, Yeast Free, wheat Free |
| Model Name | SN1985 |
| Model Number | SN1985 |
| Number of Items | 1 |
| Primary Supplement Type | L-Tryptophan |
| Product Benefits | Sleep Support |
| Special Ingredients | L-Tryptophan |
| Specific Uses For Product | relaxation, rest, sleep support |
| Supplement Formulation | Individual Supplement |
| Total Servings Per Container | 40 |
| UPC | 021078019855 |
| Unit Count | 120 Count |
| Warranty Description | Please see manufacturer's label for instruction |

## Product Details

- **Brand:** Source Naturals
- **Diet Type:** Gluten Free
- **Flavor:** Unflavored
- **Item Form:** Capsule
- **Item Weight:** 1.6 ounces
- **Item dimensions L x W x H:** 2.51 x 2.51 x 4.6 inches
- **Primary Supplement Type:** L-Tryptophan
- **Product Benefits:** Sleep Support
- **Special Ingredients:** L-Tryptophan
- **Unit Count:** 120.0 Count

## Images

![L-Tryptophan 500mg - 120 Capsules - Image 1](https://m.media-amazon.com/images/I/71VMT7Lk+EL.jpg)

## Available Options

This product comes in different **Size, Item Package Quantity** options.

## Questions & Answers

**Q: How many milligrams per tablet?**
A: 500mg each.  I typically only need 1.  Remember these tips for use.  This is a protein precursor so you will not show much affect if you have eaten protein recently.  Eat dinner a few hours before bed, and take the Tryptophan about 30 minutes before you need to sleep.  This like all amino acids function much better when you add a B-Vitamin complex to it as a transport mechanism.

**Q: Why is their no indication of the source of this tryptophan? Where does it come from?**
A: I need to know the source also.  I had been taking 5-HTP, but my body can't tolerate it.  5-HTP is made from an African legume, and I've noticed that legumes cause fibro-like inflammation in my muscles. (My father had gout.  I don't have the gout, but I can't tolerate anything derived from a bean.)   From time to time, I have had problems with certain supplements.    Knowing the source before I buy is a necessary thing for me also.

**Q: What is listed as "other ingredients"?**
A: Other Ingredients: gelatin (capsule), dibasic calcium phosphate, mycrocrystaline cellulose, silica, and magnesium stearate.  Also, listed with the L-Tryptophan is Iron (naturally occurring) 575 mcg which it indicates is 3%DV of daily need.  But the DV is according to the FDA I'm sure.  After my husband passed away, I found some of this in his things.  I took some and found it helped me get through this and also get sleep at night.

**Q: What is the source of the dextrose used for this tryptophane? Is it made in China?**
A: As you can see from the company, their ingredients are sourced from China. Kudos to them for being honest.  Unfortunately, beets and corn, especially from China, are GMO. No thanks. The search for a company that puts consumer health over profit goes on!

## Frequently Bought Together

- Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Capsules
- NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
- NOW Foods Supplements, L-Tyrosine 500 mg, Supports Mental Alertness*, Neurotransmitter Support*, 120 Capsules

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*Product available on Desertcart Saudi Arabia*
*Store origin: SA*
*Last updated: 2026-09-16*