L-Tryptophan®

Botanicals with Nutrients

Brand: Douglas Laboratories

CapsuleBotanical with NutrientsOff Market

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

Net Contents

60 Vegetarian Capsules

Serving Size

2 Vegetarian Capsules

Servings Per Container

Supplement Form

Capsule

Bar Code (UPC/SKU)

3 10539 03414 9

Product Version

Formula # 200448 V3

Label Analysis

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

6Active Ingredients

6 distinct active ingredients are disclosed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

4% Daily Value Coverage

4 ingredients report a %DV; 3 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 Capsules · 1 per day

Ingredient	Amount Per Serving	% Daily Value
Vitamin C(Ascorbyl Palmitate)	10 mg	11%
Riboflavin(Riboflavin 5-Phosphate)	10 mg	769%
Niacin(L-Tryptophan, Niacinamide)	26.7 mg	167%
Vitamin B6(Pyridoxal 5-Phosphate)	10 mg	588%
L-Tryptophan(TryptoPure)	1000 mg	—
BioPerine	5 mg	—

Not Present

Other Ingredients

Hydroxypropyl MethylcelluloseSilicaMicrocrystalline Cellulose

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 daily 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 antidepressants or other psychiatric medications, 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

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. Bioperine is a registered trademark of Sabinsa Corporation.

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

Manufacturer

Douglas Laboratories

600 Boyce Road, Pittsburgh, PA, 15205

1.800.245.4440

Market Reference

$8.95 – $395.00· 40 listings

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Target4.1(231)
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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.

e-NutritionStore.com
5.0 (10)
Vitamin & Supplements Shop
6010 Meadowridge Center Dr K, Elkridge, MD 21075, United States
Directions +1 443-483-3340
The Vitamin Shoppe
4.4 (105)
Vitamin & Supplements Shop
2460 Market St NE #701, Washington, DC 20018, United States
Directions +1 202-269-0809
TM NATURALS
4.9 (8)
Vitamin & Supplements Shop
37-34 56th St, Flushing, NY 11377, United States
Directions +1 917-515-0081
NutraBio Labs Inc
4.9 (173)
Vitamin & Supplements Shop
600 Lincoln Blvd, Middlesex, NJ 08846, United States
Directions +1 888-688-7224
NutraBoost
Vitamin & Supplements Shop
740 W Clearview Dr d, Glen Rock, PA 17327, United States
Directions
Vitasecrets
5.0 (4)
Vitamin & Supplements Shop
3327 Duke St, Alexandria, VA 22314, United States
Directions +1 866-685-7754
Nutradrill Vitamins and Supplements
Vitamin & Supplements Shop
2055 Limestone Rd Suite 200 C, Wilmington, DE 19808, United States
Directions +1 772-277-2201
NATUREAL Supplements
5.0 (2)
Vitamin & Supplements Shop
22505 Gateway Center Dr, Clarksburg, MD 20871, United States
Directions +1 855-526-5846

Research & Studies

Dietary supplements aimed at enhancing performance: efficacy and safety considerations.
TJ Maher - The Role of Protein and Amino Acids in Sustaining …, 1999 - books.google.com
… that resulted from the use of Ltryptophan, the US Food and … , healthy individual would benefit nutritionally in any way from … DOUGLAS WILMORE [off microphone]: We have examined …
19991 citations
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 …
20181,513 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. …
202439 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 …

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Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2020-08-23. DSLD Label ID: 232266. 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.