L-Tryptophan®

Other Combinations

Brand: Douglas Laboratories

CapsuleOther CombinationsOn Market

Functions

Sleep, Mood & Stress

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

Net Contents

60 Vegetarian Capsule(s)

Serving Size

2 Vegetarian Capsule(s)

Servings Per Container

Supplement Form

Capsule

Bar Code (UPC/SKU)

3 10539 03414 9

Product Version

Formula # 202677 V1

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 a %DV; 1 meet or exceed 100% DV.

2Dietary Attributes

Label states: Non-GMO, 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

Free From

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: 2 Vegetarian Capsule(s) · 1–3 per day

Ingredient	Amount Per Serving	% Daily Value
Vitamin B6(Pyridoxal 5-Phosphate)	6.7 mg	394%
L-Tryptophan(TryptoPure)	1000 mcg	—

Not Present

Other Ingredients

Hydroxypropyl Methylcellulose

Target Groups

Adult (18 - 50 Years)Women (not pregnant or lactating)Gluten Free

Label Claims

All OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested Usage: As a dietary supplement, adults take 2 capsules, 1-3 times daily, between meals or as directed by your health professional.

Warnings & Precautions

Precautions re: Pregnant or Nursing or Prescription Medications

Warning: Not to be taken by pregnant or lactating women. If you have any health condition or are taking any medication, particularly psychiatric and antidepressant medication, consult your health professional before use.

Precautions re: Children

Keep out of the reach of children.

Precautions re: All Other

Use only if safety seal is intact.

Storage

Store in a cool, dry place.

Formulation

Formulation re: Does NOT Contain

Gluten-free, Non-GMO

Formulation re: Other

Brain serotonin precursor; supports a sense of calmness and restful sleep

FDA Statements

FDA Disclaimer Statement

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

FDA Statement of Identity

Dietary Supplement

Other Label Statements

Brand IP Statement(s) re: (c), (TM), (SM)

TryptoPure is a registered trademark of Ajinomoto AminoScience, LLC.

General Statements: All Other Content

Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity. Scan to learn about our manufacturing excellence

Manufacturer & Distributor

Distributor

Douglas Laboratories

600 Boyce Road, Pittsburgh, PA, 15205

1.800.245.4440

Market Reference

$9.99 – $395.00· 40 listings

Douglas Laboratories L- Tryptophan 60 Capsules
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365 by Whole Foods Market, Free-Form L-Tryptophan 500mg, Vegan, 60 Capsules
Whole Foods Market
$18.99
Nutricost L- Tryptophan Capsules
Target4.6(1600)
$15.95
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The Healthy Place4.5(63)
$17.60
Klaire Labs L- Tryptophan 90 Capsules
Professional Supplement Center3.7(3)
$43.99
Horbaach L Tryptophan 1500mg 180 Capsules
Target4.8(30)
$21.49
The Vegan Shoppe L- Tryptophan 500mg 120 Veggie Capsules
The Vitamin Shoppe4.7(50)
$36.99

Where to Buy Locally

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

San Mateo Sports Nutrition & Supplements
5.0 (109)
Vitamin & supplements store
115 E 4th Ave, San Mateo, CA 94401
Directions (650) 344-6299
The Vitamin Shoppe
4.3 (99)
Vitamin & supplements store
1200 El Camino Real, Redwood City, CA 94063
Directions (650) 701-0273
Health by Heidi
4.4 (17)
Vitamin & supplements store
1212 W Hillsdale Blvd # G, San Mateo, CA 94403
Directions (650) 572-7100
Max Muscle San Carlos powered by NorCal Nutrition
5.0 (23)
Vitamin & supplements store
900 Laurel St, San Carlos, CA 94070
Directions (650) 592-6676
Nutrition Palace
5.0 (190)
Vitamin & supplements store
651 W Hamilton Ave Ste 1030, Campbell, CA 95008
Directions (408) 796-7344
GNC
4.7 (18)
Vitamin & supplements store
45-D Serramonte Center Spc D382, Daly City, CA 94015
Directions (628) 239-0511
The Vitamin Shoppe
4.5 (80)
Vitamin & supplements store
115 Colma Blvd, Colma, CA 94014
Directions (650) 756-2257
GNC
2.6 (31)
Vitamin & supplements store
190 HILLSDALE MALL Spc 1232, San Mateo, CA 94403
Directions (650) 356-8637

Research & Studies

Impact of the gut microbiota on intestinal immunity mediated by tryptophan metabolism
J Gao, K Xu, H Liu, G Liu, M Bai, C Peng… - Frontiers in cellular and …, 2018 - frontiersin.org
… In addition to serving as a nutrient enhancer, L-tryptophan (… are important for maintaining healthy bowels. Although the high … As an essential nutrient in mammals, L-tryptophan (Trp), and …
20181,497 citations
The biology and biochemistry of kynurenic acid, a potential nutraceutical with multiple biological effects
LF Alves, JB Moore, DB Kell - International Journal of Molecular Sciences, 2024 - mdpi.com
… Accordingly, improved functioning, and the potential for an extended and healthy lifespan, might … (viz L-tryptophan), we consider it worthwhile to review their properties in broad outline. …
202436 citations
A heretofore undisclosed crux of eosinophilia-myalgia syndrome: compromised histamine degradation
MJ Smith, RH Garrett - Inflammation Research, 2005 - Springer
… L-tryptophan is the sole or major component [39]; a preceding “sharp upturn” [40] in nationwide consumption of L-tryptophan supplements … at peak excretions in healthy humans [179];24 …
200543 citations
Post-Traumatic Stress Disorder (PTSD) & Anxiety
L McNamara - drladdvip.com
… (2) The amino acid 5-HTP (hydroxy-L-tryptophan) has been … supplement, as well as what is in the liver health supplement I … , can all be purchased from Douglas Labs by first creating a …
Chronic Fatigue Syndrome Nutritional Supplementation Helps Reduce the Symptoms & Progression of Chronic Fatigue Syndrome
LR McNamara - drladdvip.com
… disclaimer after the article, and consult your personal health care provider prior to acting … -L-Carnitine and DHEA from Douglas Labs. You can buy from Douglas Labs by first creating a …
L-Tryptophan 60 vcaps by Douglas Labs
RNR Points

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2021-04-22. DSLD Label ID: 244801. 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.