Double Strength L-Tryptophan 1000 mg®
Amino Acids & ProteinBrand: NOW
Net Contents
60 Tablet(s)
Serving Size
1 Tablet(s)
Servings Per Container
Not specified
Supplement Form
Tablet or Pill
Bar Code (UPC/SKU)
7 33739 00169 6
Product Version
CODE 0169 V3
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: 1 Tablet(s) · 1–3 per day
| Ingredient | Amount Per Serving | |
|---|---|---|
| L-Tryptophan | 1 Gram(s) | — |
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
SUGGESTED USAGE: As a dietary supplement, take 1 tablet 1 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician. Consider taking these other NOW(R) products: Inositol and Magnesium.
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 anti-depressant medications such as SSRI’s or MAOI’s), 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. Keep in Bottle.
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(R) 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.
Formula re: Contains
NOW(R) Double Strength L-Tryptophan has twice the LTryptophan (1000 mg per tablet) as in our regular strength product (500 mg per capsule).
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 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 Statements: All Other Content
TABLET SIZE
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/0169
General Statements: All Other Content
Please Recycle.
General Statements: All Other Content
Made in the USA
General: Product/Version Code
CODE 0169 V3
Manufacturer & Distributor
Other
Manufacturer
NOW FOODS
395 S. Glen Ellyn Rd., Bloomingdale, IL, 60108, USA
Market Reference
NOW Foods L- Tryptophan Double Strength 1000 mg 60 Tablets
Walmart - iHerb4.6(1400)$22.07
Now Foods L-tryptophan 1000mg Tablets (60-Count)
Walmart - Fruitful Yield4.6(1400)$43.58
Amazing Formulas L- Tryptophan 1000mg Tablets
Walmart - Vitaminshub4.7(315)$9.99Lowest
Best Naturals L-Tryptophan mg 60
Target4.7(74)$9.99Lowest
Amazing Formulas L- Tryptophan 1000 mg 120 Tablets
Amazing Nutrition4.7(315)$19.99
NOW Foods L- Tryptophan Powder
HerbsDaily.com4.5(153)$17.71
SuperSmart L- Tryptophan 1000mg per Day
SuperSmart USA4.6(69)$36.00
Brieofood L- Tryptophan 1000mg per Serving 240 Capsules
Target$18.99
Where to Buy Locally
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GNC
4.0 (32)Vitamin & supplements store
168 River Square Plaza, Hueytown, AL 35023
The Vitamin Shoppe
4.4 (167)Vitamin & supplements store
1713 Montgomery Hwy Ste 101, Birmingham, AL 35244
GNC
4.1 (39)Vitamin & supplements store
4933 Promenade Pkwy STE 129, Bessemer, AL 35022
Research & Studies
Calcium-sensing receptor regulation of gastrointestinal hormone secretion
J Anjom-Shoae, S Veedfald, AD Conigrave… - Endocrine …, 2026 - academic.oup.com
… It is now known that the receptor undergoes repetitive … 500 or 1000 mg Ca2+ (as a solution of CaCl2), in both healthy lean … of L-tryptophan on gut hormones and energy intake in healthy …
2026Tolerable upper intake level for individual amino acids in humans: a narrative review of recent clinical studies
R Elango - Advances in Nutrition, 2023 - Elsevier
… supplements because of various perceived and real health benefits. However, currently, there are no recommendations set by national health … The data suggest that in relatively healthy …
202364 citationsOver-the-counter sleep aid medications and insomnia
S Randall, TA Roehrs, T Roth - Primary Psychiatry, 2008 - academia.edu
… of untreated insomnia is now well documented. Beyond the … health services took valerian for 14 days to supplement their … insomnia, and L-tryptophan supplements have been used to …
200818 citationsCheating Death: The New Science of Living Longer and Better
R McClain - 2023 - books.google.com
… source for information regarding medical treatments for anti-… information about every medication, supplement, procedure, and … Now we give her an infusion of stem cells once or twice …
20232 citationsA Momentary Lapse of Reason: Living with L-tryptophan Induced EMS and the Hidden Dangers of Genetic Modification of Our Foods
H Behr - 2011 - books.google.com
… L-Tryptophan has destroyed my health, my relationships, … presumed problems with L-Tryptophan supplements in general … I suggest you get angry now, right now, get very angry. Take …
2011Dietary supplements aimed at enhancing performance: efficacy and safety considerations.
TJ Maher - The Role of Protein and Amino Acids in Sustaining …, 1999 - books.google.com
… that resulted from the use of Ltryptophan, the US Food and … issue of long-term health and protein quality today, but one of … particularly because iron supplementation is now being carried …
19991 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-10-25. DSLD Label ID: 26837. 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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