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 Capsule(s)

Servings Per Container

Supplement Form

Capsule

Bar Code (UPC/SKU)

3 10539 03414 9

Product Version

Formula #200448

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; 2 meet or exceed 100% DV.

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
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: 2 Vegetarian Capsule(s) · 1 per day

Ingredient	Amount Per Serving	% Daily Value
Vitamin C(Ascorbyl Palmitate)	10 mg	17%
Riboflavin(Riboflavin 5-Phosphate)	10 mg	588%
Niacin(Niacinamide)	10 mg	50%
Vitamin B6(Pyridoxal 5-Phosphate)	10 mg	500%
L-Tryptophan(TryptoPure)	1000 mg	—
Bioperine	5 mg	—

Not Present

Other Ingredients

CelluloseSilica

Target Groups

Adult (18 - 50 Years)Dairy FreeSugar Free

Label Claims

All Other

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

Suggested Usage: As a dietary supplement, adults take 2 capsules daily or as directed by your healthcare professional.

Warnings & Precautions

Precautions re: All Other

Warning: If you are taking medications for neurological conditions including Selective Serotonin Reuptake Inhibitors (SSRIs) or Monoamine Oxidase Inhibitors (MAOI), or are pregnant or nursing, do not use this product.

Precautions re: Children

KEEP OUT OF REACH OF CHILDREN.

Precautions re: All Other

Tamper resistant package, do not use if outer seal is missing.

Storage

For optimal storage conditions, store in a cool, dry place. (59(0)-77(0)F/15(0)-25(0)C) (35-65% relative humidity)

Formulation

Formulation re: Does NOT Contain

This product contains NO yeast, wheat gluten, soy protein, milk/dairy, corn, sodium, sugar, starch, artificial coloring, preservatives or flavoring.

FDA Statements

FDA Statement of Identity

A Dietary Supplement

Other Label Statements

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

TryptoPure(R) is a registered trademark of Ajinomoto AminoScience, LLC. Bioperine(R) is a registered trademark of Sabinsa Corporation.

General: Product/Version Code

Formula #200448

Manufacturer & Distributor

Manufacturer

Douglas Laboratories

600 Boyce Road, Pittsburgh, PA, 15205, USA

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
Horbaach L Tryptophan 1500mg 180 Capsules
Target4.8(30)
$21.49
L-tryptophan Supplement Nighttime Formula
Walmart - VitaPulse5.0(1)
$17.95
L- Tryptophan
SFI Health
$43.99
The Vegan Shoppe L- Tryptophan 500mg 120 Veggie Capsules
iHerb4.7(50)
$36.99
L-Tryptophan High 2fl oz
Covenant Health Products4.8(11)
$25.00
DL- Tryptophan Highly Pure
Molecular Depot
$395.00

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.

ONE STOP NUTRITION
5.0 (136)
Vitamin & supplements store
3025 N Dysart Rd #101, Avondale, AZ 85392
Directions (623) 499-7869
GNC
4.1 (58)
Vitamin & supplements store
2025 Pebble Creek Pkwy A03, Goodyear, AZ 85395
Directions (623) 536-7292
The Vitamin Shoppe
4.4 (140)
Vitamin & supplements store
10020 W McDowell Rd #101, Avondale, AZ 85392
Directions (623) 478-0898
Vitamin Shoppe Distribution Center
4.2 (41)
Warehouse
925 N 127th Ave, Avondale, AZ 85323
Directions (602) 782-3005
Sanctuary Oils LLC
4.5 (17)
Vitamin & supplements store
303 W Van Buren St #105a, Avondale, AZ 85323
Directions (623) 570-8711
Amway Distributor- Health & wellness Shop
Health and beauty shop
15585 W Meade Ln, Goodyear, AZ 85338
Directions (602) 488-8833
Discount Nutrition Superstore
5.0 (1091)
Vitamin & supplements store
16772 W Bell Rd Ste 107, Surprise, AZ 85374
Directions (623) 440-5617
Power Nutrition - Vitamins & Sports Supplements
4.6 (33)
Vitamin & supplements store
5052 W Olive Ave, Glendale, AZ 85302
Directions (623) 939-0899

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 2013-07-25. DSLD Label ID: 10599. 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.