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

$9.99 – $395.00· 40 listings

Douglas Laboratories L- Tryptophan 60 Capsules
Cincinnati Health Institute4.7(6)
$54.50
L-Tryptophan
DrHagmeyer.com4.7(6)
$43.34
Nutricost L- Tryptophan Capsules
Target4.6(1600)
$15.95
L-tryptophan Supplement Nighttime Formula
Walmart - VitaPulse5.0(1)
$17.95
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
L-Tryptophan Pure Encapsulations
Pure For You4.6(40)
$72.50
L-Tryptophan 500 mg
Curated Wellness4.6(1100)
$18.25

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.

Supplement Superstore
4.8 (129)
Vitamin & supplements store
8600 Ward Pkwy Ste 2140, Kansas City, MO 64114
Directions (816) 326-7155
The Vitamin Shoppe
4.5 (95)
Vitamin & supplements store
9 W 62 Terrace, Kansas City, MO 64113
Directions (816) 363-1223
Supplement Superstores
5.0 (1202)
Vitamin & supplements store
7344 W 135th St, Overland Park, KS 66223
Directions (913) 402-6813
Supplement Superstores
5.0 (797)
Vitamin & supplements store
11991 S Black Bob Rd, Olathe, KS 66062
Directions (913) 839-2558
YEP STRENGTH
5.0 (13)
Vitamin & supplements store
2750 Cherry St Ste 100F, Kansas City, MO 64108
Directions (253) 800-9192
Spirit of Health
4.8 (215)
Vitamin & supplements store
5901 Main St, Grandview, MO 64030
Directions (816) 492-5648
GNC
4.2 (57)
Vitamin & supplements store
4025 Mill Street Britton, Kansas City, MO 64111
Directions (816) 561-2280
Supplement Superstore
5.0 (1031)
Vitamin & supplements store
8705 Shawnee Mission Pkwy, Merriam, KS 66202
Directions (913) 400-2028

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

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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.