L-Tryptophan 500 mg®

Other Combinations

Brand: Source Naturals

CapsuleOther CombinationsOff Market

Product label for L-Tryptophan 500 mg — Click to view full label

Net Contents

60 Capsule(s)

Serving Size

1 Capsule(s)

Servings Per Container

Supplement Form

Capsule

Bar Code (UPC/SKU)

0 21078 01984 8

Product Version

SN1984 REV C101

Label Analysis

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

2Active Ingredients

2 distinct active ingredients are disclosed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

1% Daily Value Coverage

1 ingredients report an established %DV per serving.

1Dietary Attributes

Label states: Gluten-Free.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen Guide

Contains

Milk
Egg
Wheat
Soy
Gluten

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Supplement Facts

Serving Size: 1 Capsule(s) · 3 per day

Ingredient	Amount Per Serving	% Daily Value
Iron	575 mcg	3%
L-Tryptophan	1.5 g	—

Not Present

Other Ingredients

GelatinMicrocrystalline CelluloseDibasic Calcium PhosphateSilicon Dioxide, ColloidalMagnesium Stearate

Target Groups

Adult (18 - 50 Years)No AllergiesGluten FreeDairy FreeSugar Free

Label Claims

All OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested Use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 capsules before bed.

Warnings & Precautions

Precautions re: All Other

Do not use if either tamper-evident seal is broken or missing.

Precautions re: Children

Keep out of the reach of children.

Precautions re: Pregnant or Nursing or Prescription Medications

CAUTION: If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs consult your health care professional before using this product.

Storage

STORE IN A COOL, DRY PLACE.

Formulation

Formulation re: Does NOT Contain

HYPOALLERGENIC: contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

FDA Statements

FDA Statement of Identity

DIETARY SUPPLEMENT

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Other Label Statements

General Statements: All Other Content

The essential amino acid L-tryptophan helps support relaxation, restful sleep, and positive mood. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response and sleep/wake cycles. L-Tryptophan also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity. If needed, L-Tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-TRYPTOPHAN is extremely pure and is regularly tested to ensure the highest standards of quality.*

General Statements: All Other Content

MOOD, RELAXATION, SLEEP*

General: Product/Version Code

SN1984 REV C101

Manufacturer & Distributor

Manufacturer

Source Naturals, Inc.

P. O. Box 2118, Santa Cruz, CA, 95062

Market Reference

$9.99 – $159.50· 40 listings

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PointBlank Nutrition4.6(1100)
$19.99
Nutricost L- Tryptophan Capsules
Target4.6(1600)
$15.95
Best Naturals L- Tryptophan 500 Mg 120 Capsules
Target4.4(61)
$26.95
(2 pack) Best Naturals L-Tryptophan 500 mg 120 Capsules, Size: 1 Capsule, White
Walmart - Best Naturals4.4(61)
$23.38
The Vegan Shoppe L- Tryptophan 500mg 120 Veggie Capsules
The Vitamin Shoppe4.7(50)
$36.99

Where to Buy Locally

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Foundation Sycamore Illinois
5.0 (25)
Vitamin & supplements store
1565 DeKalb Ave a, Sycamore, IL 60178
Directions (815) 608-4100
Family Health Center
4.9 (42)
Vitamin & supplements store
1170 DeKalb Ave Ste 111, Sycamore, IL 60178
Directions (815) 895-8151
Thyme 'N Again Apothecary
5.0 (26)
Herb shop
161 E Lincoln Hwy, DeKalb, IL 60115
Directions (815) 552-0055
Walgreens
3.1 (126)
Vitamin & supplements store
100 W Lincoln Hwy Walgreens, DeKalb, IL 60115
Directions (815) 756-1815
CVS
3.3 (99)
Vitamin & supplements store
1022 W Lincoln Hwy, DeKalb, IL 60115
Directions (815) 748-0648
The Vitamin Shoppe
4.6 (63)
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1034 Commons Dr, Geneva, IL 60134
Directions (630) 845-0891
Xtreme Sports Nutrition
4.9 (41)
Vitamin & supplements store
3725 Swenson Ave, St. Charles, IL 60174
Directions (331) 240-2160
GNC
4.8 (38)
Vitamin & supplements store
145 S Randall Rd, Batavia, IL 60510
Directions (630) 406-9941

Research & Studies

Tryptophan As A Nutraceutical–Clinical And A Critical
MR Suchitra, P Krubaa, S Parthasarathy - European Journal of Molecular & … - academia.edu
… , an American organization that promotes medical health research, originated the term "… L Tryptophan is available in the commercial product as 125 mg/ capsule or 500 mg/ capsule …
Tryptophan As A Nutraceutical–Clinical And A Critical
MR Suchitra, P Krubaa, S Parthasarathy - European Journal of … - painfreepartha.com
… , an American organization that promotes medical health research, originated the term "… L Tryptophan is available in the commercial product as 125 mg/ capsule or 500 mg/ capsule …
l-Tryptophan
BMD Knapp, MJ Cupp, TS Tracy - … Supplements: Toxicology and Clinical …, 2003 - Springer
… ill patients who might be of generally worse health than controls and therefore more likely to use a dietary supplement such as L-tryptophan. Of the patients identified with eosinophil …
20035 citations
Tryptophan and its role in sleep and mood
P Yousef, J Rosen, C Shapiro - Studies in Natural Products Chemistry, 2024 - Elsevier
… It is consumed from different food sources in the form of L-tryptophan. In this chapter, we review the … In the pediatric population, l-tryptophan can be safely and effectively used to manage …
202419 citations
Natural products of relevance in the prevention and supportive treatment of depression
B Muszyńska, M Łojewski, J Rojowski, W Opoka… - Psychiatr …, 2015 - psychiatriapolska.pl
… of natural origin plays a role in treatment of health problems, and … It was found that 5-hydroxy-L-tryptophan, L-tryptophan (which … L-Tryptophan, 5-hydroxy-L-tryptophan are present in the …
2015109 citations
Safety of 5-hydroxy-L-tryptophan
YT Das, M Bagchi, D Bagchi, HG Preuss - Toxicology letters, 2004 - Elsevier
5-Hydroxy-l-tryptophan (5-HTP) is the immediate precursor in the biosynthesis of 5-hydroxy-… amino acid l-tryptophan (l-Trp). The use of l-Trp as a dietary supplement was discontinued in …
2004147 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-01-25. DSLD Label ID: 17921. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.