Net Contents
2 oz.
Serving Size
0.25–0.5 tsp
Servings Per Container
57
Supplement Form
Powder
Bar Code (UPC/SKU)
7 33739 00263 1
Product Version
CODE 0263 V4
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
Single-ingredient formula listed in Supplement Facts.
Every active ingredient discloses a specific amount per serving.
Label states: Vegan, 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.
Supplement Facts
Serving Size: 0.25–0.5 tsp · 2–3 per day
| Ingredient | Amount Per Serving | |
|---|---|---|
| L-Tryptophan | 950 mg | — |
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
SUGGESTED USAGE: As a dietary supplement, take one or two 1/4 level teaspoons 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician.
Warnings & Precautions
Precautions re: All Other
Caution: For adults only.
Precautions re: All Other
May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery.
Precautions re: Children
Keep out of reach of children.
Precautions re: Pregnant or Nursing or Prescription Medications
Consult physician if pregnant/nursing, taking medication (especially antidepressants such as SSRIs or MAOIs), or have a medical condition.
Precautions re: Allergies
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Precautions re: All Other
Caution: Do Not Eat Freshness Packet Enclosed.
Storage
Storage
Store in a cool, dry place after opening.
Formulation
Formulation re: Vegetarian/Vegan
Vegetarian/Vegan
Formulation re: Does NOT Contain
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.
Formulation re: Does NOT Contain
Every lot of NOW(R) L-Tryptophan is tested to be free of Peak E and microbial contamination.
FDA Statements
FDA Statement of Identity
A 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
General: Product/Version Code
CODE 0263 V4
General Statements: All Other Content
SUPPORTS RELAXATION
General Statements: All Other Content
- Premium Grade - Encourages Positive Mood - Promotes Restful Sleep*
Seals/Symbols
GMP QUALITY ASSURED
General Statements: All Other Content
For more product information visit www.nowfoods.com/0263
General Statements: All Other Content
This product is sold by weight not volume.
General Statements: All Other Content
Please Recycle.
General Statements: All Other Content
L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. L-Tryptophan is critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function.*
Manufacturer & Distributor
Other
Distributor
NOW FOODS
395 S. Glen Ellyn Rd., Bloomingdale, IL, 60108, USA
Market Reference
NOW Foods L- Tryptophan Powder
iHerb4.5(153)$22.03
(2 pack) Now Foods L-Tryptophan 2 oz Powder, Size: 2.30
Walmart - Fruitful Yield$41.84
Now L-Tryptophan
iHerb4.6(4600)$13.46
Now Foods L- Tryptophan 500mg 90 Veg Capsules
PureFormulas.com4.6(4600)$16.96
Now Foods, L-Tryptophan, Powder, 2 oz (57 g)
Silkrute$115.35
L- Tryptophan Supplement Powder
Target4.9(119)$30.97
(2 pack) NOW Foods L-Tryptophan, 500 mg, 60 Veg Capsules, Size: 4.35, Other
Walmart - Fruitful Yield4.6(4600)$29.72
NOW L-Tryptophan 500 mg 60 Vegicaps
lazyacres.com4.6(4600)$23.99
Where to Buy Locally
Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.
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Supreme Nutrition Greenville
5.0 (227)Vitamin & supplements store
1143 Woodruff Rd Ste A-2, Greenville, SC 29607
GNC
4.0 (55)Vitamin & supplements store
404 Harrison Bridge Rd G, Simpsonville, SC 29680
The Vitamin Shoppe
4.5 (147)Vitamin & supplements store
1129 Woodruff Rd Ste E, Greenville, SC 29607
All Natural Health & Beauty Center
4.6 (48)Vitamin & supplements store
101 E College St, Simpsonville, SC 29681
Garner's Natural Life - Woodruff
4.6 (105)Vitamin & supplements store
1601 Woodruff Rd Suite A-B, Greenville, SC 29607
The Vitamin Shoppe
4.5 (90)Vitamin & supplements store
4839 Calhoun Memorial Hwy US 123, Easley, SC 29640
Garner's Natural Life
4.6 (157)Vitamin & supplements store
27 S Pleasantburg Dr #20, Greenville, SC 29607
GNC
3.7 (74)Vitamin & supplements store
101 Verdae Blvd #500, Greenville, SC 29607
Research & Studies
Role of tryptophan in health and disease: Systematic review of the anti-oxidant, anti-inflammation, and nutritional aspects of tryptophan and its metabolites
RB Singh - World Heart Journal, 2019 - search.proquest.com
… L-Tryptophan is an essential amino acid that is needed for the synthesis of proteins and … It is now becoming clear that GI tract serotonin plays an important role in the brain-gut-axis and …
201958 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 citationsA systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning
AM Kikuchi, A Tanabe, Y Iwahori - Journal of dietary supplements, 2021 - Taylor & Francis
… and negative mood in healthy adult populations. We have targeted healthy adult men and … Now she works as an academic officer at LLC Okutoeru from 2018. Her research interests …
2021109 citationsHealth benefits of tryptophan in children and adults
BN Nayak, HS Buttar - J. Pharm. Sci. Technol. Manage, 2015 - pharmacy.nmims.edu
… This mini-review provides a brief overview of the role of L-tryptophan … It's now becoming clear that serotonin plays an important … trials suggest that L-tryptophan supplementation may be …
201512 citationsTryptophan: current status and future trends for oral administration
LD Kaufman, RM Philen - Drug safety, 1993 - Springer
… the ingestion of tryptophan (L-tryptophan)-containing products (… as these pose enormous public health threats to potentially … to EMS that are now being reported incorrectly as EMS. …
199327 citationsl-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 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2014-10-27. DSLD Label ID: 36998. 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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