Net Contents
2 oz.
Serving Size
2 tsp
Servings Per Container
57
Supplement Form
Powder
Bar Code (UPC/SKU)
7 33739 00263 1
Product Version
CODE 0263 V6
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, 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.
Supplement Facts
Serving Size: 2 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: 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: 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: 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: All Other
Do Not Eat Freshness Packet Enclosed.
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.
Storage
Storage
Store in a cool, dry place after opening.
Formulation
Formulation re: Does NOT Contain
Every lot of NOW L-Tryptophan is tested to be free of Peak E and microbial contamination.
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.
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
Seals/Symbols
GMP QUALITY ASSURED
General Statements: All Other Content
Amino Acids
General Statements: All Other Content
Family owned since 1968.
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.*
General: Product/Version Code
CODE 0263 V6
General Statements: All Other Content
Supports Relaxation*
General Statements: All Other Content
~ Encourages Positive Mood* ~ Promotes Restful Sleep*
Seals/Symbols
Non-GMO
General Statements: All Other Content
This product is sold by weight not volume.
General Statements: All Other Content
Please Recycle.
Manufacturer & Distributor
Manufacturer
NOW Foods
395 S. Glen Ellyn Rd., Bloomingdale, IL, 60108, USA
Market Reference
L- Tryptophan Powder
Vitacost.com4.5(158)$22.03NOW Foods L- Tryptophan Powder
NOW$35.99Now Foods, L-Tryptophan, Powder, 2 oz (57 g)
Silkrute$115.35NOW Foods L- Tryptophan Relaxation Support Capsules
iHerb4.6(4100)$13.46Now Foods L-Tryptophan 500 mg
Walmart - DailyVita4.6(5600)$22.41L- Tryptophan Supplement Powder
Target4.9(119)$30.97NOW Foods L- Tryptophan Double Strength 1000 mg 60 Tablets
Walmart - Highland Health Foods4.6(1400)$18.25L-Tryptophan Powder
Herbadiet$12.99
Where to Buy Locally
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PrimeBody (Arroios)
4.9 (194)Vitamin & supplements store
R. Passos Manuel 83B, 1150-258 Lisboa
NutriLx Store
4.9 (135)Vitamin & supplements store
Loja 1 dentro da Estação Metro Campo Pequeno, Av. da República 63B, 1050-189 Lisboa
nutry4ALL
4.2 (27)Vitamin & supplements store
Av. Duque de Loulé 45 A, 1050-086 Lisboa
DietSport-Lisboa
4.4 (35)Vitamin & supplements store
Centro Comercial Martim Moniz 1°piso Praça Martim Moniz Lj D3, 1100-341 Lisboa
Enetural
4.3 (47)Vitamin & supplements store
Rua dos, R. Bem Lembrados 141, Manique, 2645-471 Alcabideche
My Formula - Suplementação Personalizada
5.0 (47)Vitamin & supplements store
R. David de Sousa 27B, 1000-246 Lisboa
MySuplementos
4.6 (142)Vitamin & supplements store
R. Shopping loja nº 240, 4520-625
Bliss Natura - Suplementos Alimentares 100% naturais!
4.5 (22)Vitamin & supplements store
R. David de Sousa 27B, 1000-106 Lisboa
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 …
201960 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 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 citationsWhy Moss Nutrition Is No Longer Selling L-Tryptophan Supplements (At Least For Now)-Part I.
J Moss - Nutritional Perspectives: Journal of the Council on …, 2015 - search.ebscohost.com
… These experiences led me to completely re-evaluate my stance on whether supplemental L-tryptophan might pose a significant health threat to a small but notable portion of the …
2015Tryptophan: 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 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2015-11-24. DSLD Label ID: 53458. 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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