Net Contents
120 Capsule(s)
Serving Size
1 Capsule(s)
Servings Per Container
40
Supplement Form
Capsule
Bar Code (UPC/SKU)
0 21078 01985 5
Product Version
Not Present
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
2 distinct active ingredients are disclosed in Supplement Facts.
Every active ingredient discloses a specific amount per serving.
1 ingredients report an established %DV per serving.
Label states: 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: 1 Capsule(s) · 3 per day
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
Suggested use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take an additional 3 capsules before bed.
Warnings & Precautions
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.
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 healthcare professional before using this product.
Precautions re: Children
Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call of doctor or poison control center immediately.
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 positive mood. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response and sleep/wake cycles. L-tryptophan also supports immune functions because it 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: Does NOT Contain
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no 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 with Coenzyme B-6
Vitacost.com4.6(287)$20.55
L-Tryptophan Source Naturals
iHerb4.6(1100)$21.81
Source Naturals Serene Science L- Tryptophan 120 Capsule
Herbs Direct4.6(1100)$24.46
Source Naturals L-Tryptophan 500mg
PointBlank Nutrition4.6(1100)$19.99
Best Naturals L- Tryptophan 500 Mg 120 Capsules
Target4.4(61)$26.95
Nutricost L- Tryptophan Capsules
Target4.6(1600)$15.95
(2 pack) Best Naturals L-Tryptophan 500 mg 120 Capsules, Size: 1 Capsule, White
Walmart - Best Naturals4.4(61)$23.38
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.
GNC
3.7 (61)Vitamin & supplements store
2369 Murfreesboro Rd, Nashville, TN 37217
Healthyroot Nutritional Products
5.0 (1)Vitamin & supplements store
411 Brooksboro Terrace, Nashville, TN 37217
Nutrition Faktory
4.5 (44)Vitamin & supplements store
303 Sam Ridley Pkwy W, Smyrna, TN 37167
The Vitamin Shoppe
4.6 (24)Vitamin & supplements store
3175 Lebanon Pike Ste 103, Nashville, TN 37214
The B-12 Store Opry Mills
4.7 (78)Vitamin & supplements store
365 Opry Mills Dr, Nashville, TN 37214
Soul & Soil
5.0 (71)Vitamin & supplements store
2940 Murfreesboro Pike #109, Antioch, TN 37013
Nutrishop Mt. Juliet
5.0 (335)Vitamin & supplements store
300 Pleasant Grove Rd #320, Mt. Juliet, TN 37122
Walgreens
2.3 (136)Vitamin & supplements store
2909 Murfreesboro Pike, Antioch, TN 37013
Research & Studies
Tryptophan As A Nutraceutical–Clinical And A Critical
MR Suchitra, P Krubaa, S Parthasarathy - European Journal of Molecular & … - academia.edu
… 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 …
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 citationsIntraduodenal calcium enhances the effects of L-tryptophan to stimulate gut hormone secretion and suppress energy intake in healthy males: a randomized …
J Anjom-Shoae, PCE Fitzgerald, M Horowitz… - The American journal of …, 2024 - Elsevier
Background In humans, intraduodenal infusion of L-tryptophan (Trp) increases plasma concentrations of gastrointestinal hormones and stimulates pyloric pressures, both key …
202410 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-…
2018398 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 …
202419 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: 295955. 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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