---
product_id: 79053498
title: "Klaire Labs SFI Health L-Tryptophan - 2000 Milligrams Amino Acid Precursor to Serotonin & Melatonin, Mood & Sleep Support (90 Capsules)"
brand: "sfi health"
price: "฿4739"
currency: THB
in_stock: true
reviews_count: 7
category: "Sfi Health"
url: https://www.desertcart.co.th/products/79053498-klaire-labs-sfi-health-l-tryptophan-2000-milligrams-amino-acid
store_origin: TH
region: Thailand
---

# supports deep REM sleep free from 12 common allergens 2000mg potent dose Klaire Labs SFI Health L-Tryptophan - 2000 Milligrams Amino Acid Precursor to Serotonin & Melatonin, Mood & Sleep Support (90 Capsules)

**Brand:** sfi health
**Price:** ฿4739
**Availability:** ✅ In Stock

## Summary

> 🌙 Elevate your nights, energize your days—sleep smarter, live better!

## Quick Answers

- **What is this?** Klaire Labs SFI Health L-Tryptophan - 2000 Milligrams Amino Acid Precursor to Serotonin & Melatonin, Mood & Sleep Support (90 Capsules) by sfi health
- **How much does it cost?** ฿4739 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/79053498-klaire-labs-sfi-health-l-tryptophan-2000-milligrams-amino-acid)

## Best For

- sfi health enthusiasts

## Why This Product

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

## Key Features

- • **Wake Up Refreshed:** Promotes restful sleep without morning grogginess
- • **Clean & Pure Formula:** No artificial additives or common allergens—pure wellness
- • **Powerful 2000mg Dose:** High-strength L-Tryptophan for effective serotonin & melatonin boost
- • **Physician-Trusted Brand:** Formulated since 1969 with healthcare professional guidance
- • **Clinically Supported Calm:** Backed by trials for mood & relaxation

## Overview

Klaire Labs SFI Health L-Tryptophan delivers a potent 2000mg dose of this essential amino acid, a natural precursor to serotonin and melatonin. Clinically supported to enhance mood, relaxation, and sleep quality without morning grogginess, it’s crafted free from 12 common allergens and artificial additives. Trusted by healthcare professionals since 1969, this supplement is designed for those seeking clean, effective support for well-being and restorative rest.

## Description

Essential amino acidL-Tryptophan is an essential alpha-amino acid that is a precursor to the neurotransmitters serotonin and melatonin. Supplementation with tryptophan has been shown in numerous clinical trials to be safe, well-tolerated, and supportive of well-being, calmness, relaxation, sleep, and appetite control.* For best results, take tryptophan on an empty stomach, or with a small serving of carbohydrates.

Review: No grogginess in the morning! - This brand was recommended by my natural doctor and I believe they have great quality supplements. They have them at their office, but when I don't want to drive across town, I purchase them on desertcart. They've always shown up on time, sealed, and in good condition. I do not notice any difference between these and the ones I purchase at my doctors. These are the only sleeping supplements that don't leave me groggy in the morning. I was told that it builds up in your system, so it's best to start with three an hour before bed, then go down to two and eventually one. If I am taking the proper dosage, I don't have any weird dreams. If I take them and don't feel like I'm getting solid sleep, I increase the amount and then sleep great. It takes a little while for it to start working well, so I recommend giving it some time before you decide for sure if they work well for you. Every body is different - this is just what has worked for me. I have a pretty sensitive system and these don't seem to bother me at all.
Review: quality and efficacy - while everyone is different - this product is extremely effective for me to wind down and get to REM sleep at night.

## Features

- L-Tryptophan is a precursor to the neurotransmitters serotonin and melatonin.
- Supplementation with tryptophan has been shown in numerous clinical trials to be safe, well-tolerated, and supportive of well-being, calmness, relaxation, sleep, and appetite control.*
- Free of the following common allergens: milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, soybeans, corn, and yeast. Contains no artificial colors, flavors, or preservatives.
- For best results, take tryptophan on an empty stomach, or with a small serving of carbohydrates.
- Founded in 1969, Klaire Labs products are developed closely with physicians and are intended to be used as directed by a healthcare practitioner.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B079TZ2HFH |
| Best Sellers Rank | #259,857 in Health & Household ( See Top 100 in Health & Household ) #2,720 in Amino Acid Nutritional Supplements |
| Customer Reviews | 3.6 3.6 out of 5 stars (15) |
| Date First Available  | February 15, 2018 |
| Manufacturer  | SFI Health |
| Package Dimensions  | 4.8 x 2.28 x 2.24 inches; 3.53 ounces |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** SFI Health
- **Dosage Form:** Capsule
- **Item Form:** Capsule
- **Item Weight:** 0.1 Kilograms
- **Material Feature:** No Artificial Colors
- **Number of Items:** 90
- **Package Information:** Bottle
- **Product Benefits:** Sleep Support
- **Unit Count:** 90.00 Count

## Images

![Klaire Labs SFI Health L-Tryptophan - 2000 Milligrams Amino Acid Precursor to Serotonin & Melatonin, Mood & Sleep Support (90 Capsules) - Image 1](https://m.media-amazon.com/images/I/61jkHHYW+QL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ No grogginess in the morning!
*by M***E on November 13, 2025*

This brand was recommended by my natural doctor and I believe they have great quality supplements. They have them at their office, but when I don't want to drive across town, I purchase them on Amazon. They've always shown up on time, sealed, and in good condition. I do not notice any difference between these and the ones I purchase at my doctors. These are the only sleeping supplements that don't leave me groggy in the morning. I was told that it builds up in your system, so it's best to start with three an hour before bed, then go down to two and eventually one. If I am taking the proper dosage, I don't have any weird dreams. If I take them and don't feel like I'm getting solid sleep, I increase the amount and then sleep great. It takes a little while for it to start working well, so I recommend giving it some time before you decide for sure if they work well for you. Every body is different - this is just what has worked for me. I have a pretty sensitive system and these don't seem to bother me at all.

### ⭐⭐⭐⭐⭐ quality and efficacy
*by J***K on January 1, 2023*

while everyone is different - this product is extremely effective for me to wind down and get to REM sleep at night.

### ⭐⭐⭐⭐⭐ I take every night
*by K***Y on April 9, 2021*

I take one every night, and it helps me sleep and I am better able to handle my worried mind the next day. I do not like living without this stuff.

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-24*