L-Tryptophan 500 mg®
Amino Acids & ProteinBrand: Source Naturals
Functions
Net Contents
120 Tablet(s)
Serving Size
3 Tablet(s)
Servings Per Container
40
Supplement Form
Tablet or Pill
Bar Code (UPC/SKU)
0 21078 01980 0
Product Version
SN1980 REV L141
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
3 distinct active ingredients are disclosed in Supplement Facts.
Every active ingredient discloses a specific amount per serving.
2 ingredients report an established %DV per serving.
Label states: Vegetarian, 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: 3 Tablet(s) · 1 per day
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
Suggested use: 1 tablet three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 tablets before bed.
Warnings & Precautions
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.
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.
Storage
Storage
Store in a cool, dry place.
Formulation
Formulation re: Other
Mood, relaxation, sleep
Formula re: Contains
The essential amino acid L-tryptophan helps support relaxation, restful sleep, and feeling better. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response. 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.
Formulation re: Vegetarian/Vegan
Suitable for vegetarians and hypoallergenic: contains no yeast, dairy, egg, gluten, corn, soy or wheat.
Formulation re: Other
Suitable for vegetarians and hypoallergenic: contains no yeast, dairy, egg, gluten, corn, soy or wheat.
Formulation re: Does NOT Contain
Suitable for vegetarians and 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
Brand IP Statement(s) re: (c), (TM), (SM)
Copyright Source Naturals, Inc.
Manufacturer & Distributor
Distributor
Source Naturals, Inc.
P. O. Box 2118, Santa Cruz, CA, 95062
Market Reference
Source Naturals L Tryptophan
Vitacost.com4.6(1100)$21.81Source Naturals L-Tryptophan with Coenzyme B-6
Walmart - Health Chest4.6(296)$8.88LowestSource Naturals L-Tryptophan 500mg 30 Cap
Four Seasons Natural Foods4.6(1100)$9.59Best Naturals L- Tryptophan 500 Mg 120 Capsules
Target$26.95Best Naturals L-Tryptophan mg 60
Best Naturals4.5(135)$9.99Pure Naturals L- Tryptophan Dietary Supplement
Walmart - Vitaminshub4.3(6)$14.49L-Tryptophan 500 mg
Natural Wellness Corner4.7(143)$23.00Source Naturals Serene Science L- Tryptophan 500mg 60 Capsule
HerbsPro.com$22.75
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.
The Vitamin Shoppe
4.7 (88)Vitamin & supplements store
8922 S Broadway Ave Ste 104, Tyler, TX 75703
5 Star Nutrition Tyler
5.0 (316)Vitamin & supplements store
5201 S Broadway Ave #104, Tyler, TX 75703
Gun Barrel Health Foods
4.8 (26)Vitamin & supplements store
1032 W Main St, Gun Barrel City, TX 75156
Total Nutrition CBD - Mockingbird
4.8 (87)Vitamin & supplements store
5706 E Mockingbird Ln, Dallas, TX 75206
Vitamin World -- In-Store Shopping or Curbside Pickup
4.5 (14)Vitamin & supplements store
301 Tanger Dr, Terrell, TX 75160
GNC
4.4 (73)Vitamin & supplements store
1110 Town East Mall, Mesquite, TX 75150
Rockwall Nutrition
4.9 (15)Vitamin & supplements store
585 I-30, Rockwall, TX 75087
The Vitamin Shoppe
4.3 (230)Vitamin & supplements store
18661 Lyndon B Johnson Fwy #100, Mesquite, TX 75150
Research & Studies
Tryptophan As A Nutraceutical–Clinical And A Critical
MR Suchitra, P Krubaa, S Parthasarathy - European Journal of … - painfreepartha.com
… L Tryptophan is available in the commercial product as 125 mg/ capsule or 500 mg/ capsule … was lowered in preeclamptic compared with the healthy placental arteries, consistent with …
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 citationsAnalysis, nutrition, and health benefits of tryptophan
M Friedman - International Journal of Tryptophan Research, 2018 - journals.sagepub.com
… Here, tryptophan refers to l-tryptophan and the isomeric form produced during food … in the absence of l-tryptophan; ie, the mice must meet the entire need for l-tryptophan from the d-…
2018402 citationsTryptophan 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 …
202420 citationsEffectiveness of Silymarin, Sulforaphane, Lycopene, Green Tea, Tryptophan, Glutathione, and Escin on Human Health: A Narrative Review.
F Sebastiani, C D'Alterio, C Vocca, L Gallelli… - Uro, 2023 - search.ebscohost.com
… There is an enormous amount of substances and actives of natural origin that are known for their purported health benefits. The aim of this review is to narratively summarize the …
202310 citationsNatural 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 …
2015110 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2023-08-23. DSLD Label ID: 295956. 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.
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