L-Tryptophan 1000 mg®
Amino Acids & ProteinBrand: Protocol For Life Balance
Functions
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 07359 10169 2
Product Version
CODE P0169 V5
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: 1 Tablet(s) · 1–2 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: Take 1 tablet 1 to 2 times daily on an empty stomach, with final dose at bedtime, or as directed by your healthcare practitioner.
Warnings & Precautions
Precautions re: Pregnant or Nursing or Prescription Medications
Cautions/Interactions: Tryptophan supplements may interact with CNS depressants, antidepressants (SSRIs, MAOIs), and other serotonergic agents such as St. John's Wort and 5-HTP. Consult your healthcare practitioner if you are taking medications or herbs, are pregnant/nursing, or if you have liver impairment.
Precautions re: All Other
May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery.
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
Do not eat freshness packet. Keep in bottle.
Formulation
Formulation re: Does NOT Contain
Every lot of Protocol For Life Balance L-Tryptophan is tested to be free of Peak E and microbial contamination.
Formulation re: Vegetarian/Vegan
Vegetarian/Vegan
Formulation re: Does NOT Contain
Non-GMO
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
General Statements: All Other Content
How It Works: L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. In the brain, Tryptophan is converted into serotonin, a neurotransmitter involved in feelings of well-being, calmness, personal security, and relaxation.* It also plays a role in the regulation of appetite and synchronization of sleep patterns.*
General: Product/Version Code
CODE P0169 V5
General Statements: All Other Content
~ Encourages positive mood* ~ Supports relaxation & restful sleep*
Seals/Symbols
Non-GMO
General Statements: All Other Content
Natural color variation may occur in this product.
Manufacturer & Distributor
Manufacturer
Protocol For Life Balance
395 S. Glen Ellyn Rd., Bloomingdale, IL, 60108, USA
Market Reference
Protocol For Life Balance L-Tryptophan 500 mg
Covenant Health Products4.7(143)$38.00L-Tryptophan 1000mg
personalpower4.7(143)$38.00Best Naturals L-Tryptophan mg 60
Target4.5(135)$9.99Protocol for Life Balance L Glutamine
iHerb4.9(66)$27.00Protocol For Life Balance 5-HTP 100mg 90 Capsules
Vitacost.com4.8(83)$30.00NOW Foods L- Tryptophan Double Strength 1000 mg 60 Tablets
Wonder Laboratories4.6(1400)$22.29L-Tryptophan Pure Encapsulations
Pure Prescriptions4.6(42)$72.50Protocol for Life Balance Clinical Stress Relief 60 Capsules
Supplement First4.8(32)$33.00
Where to Buy Locally
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Holly Hill Health Foods, Inc.
4.7 (160)Vitamin & supplements store
1200 Welsh Rd Ste N, North Wales, PA 19454
Puriva Nutrition
4.9 (60)Vitamin & supplements store
Nutrition Bar inside LA Fitness, 120 Garden Golf Blvd, North Wales, PA 19454
The Vitamin Shoppe
4.4 (88)Vitamin & supplements store
757 Bethlehem Pike, Montgomeryville, PA 18936
GNC
3.2 (37)Vitamin & supplements store
1210 Bethlehem Pike, North Wales, PA 19454
Optimal Nutrition
4.9 (70)Vitamin & supplements store
801 County Line Rd, Horsham, PA 19044
Solutions 4 Health
4.9 (78)Vitamin & supplements store
165B Swedesford Rd, Wayne, PA 19087
Queens Nutritional Products
5.0 (1)Store
711 PA-113, Souderton, PA 18964
The Vitamin Shoppe
4.4 (184)Vitamin & supplements store
1817 Old York Rd, Abington, PA 19001
Research & Studies
… Amino Acid Supplementation Alone or Combined With Tryptophan or Methionine on Appetite Control and Related Health Outcomes in Older Adults: Protocol …
S Zhang, R Ribeiro, D Raubenheimer… - … Protocols, 2026 - researchprotocols.org
… In this paper, we have outlined the protocol for the study design, recruitment, collection, and processing of health assessment data related to the OptHealth study. As the global …
2026L-Tryptophan: Basic Metabolic Functions, Behavioral Research and Therapeutic Indications
DM Richard, MA Dawes, CW Mathias… - International …, 2009 - journals.sagepub.com
… healthy nutrition. While typical intake for many individuals is approximately 900 to 1000 mg daily… mg/day 5,12,13 and 425 mg/day, 4,14,15 which translates to a dietary intake of 3.5 to 6.0 …
2009981 citationsRole 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 … ranges are: L-tryptophan (50 -1,000 mg), serotonin/5HTP (50-100 mg), and melatonin (1-10 mg). …
201960 citationsOral tryptophan activates duodenal aryl hydrocarbon receptor in healthy subjects: a crossover randomized controlled trial
GH Rueda, N Causada-Calo… - American Journal …, 2024 - journals.physiology.org
… and washout periods, with an estimated amount of 1,000 mg l-tryptophan intake per day. … l-tryptophan supplementation, which is not surprising as this study was performed in healthy …
202430 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
… This systematic review includes 11 RCTs that examined the effects of TRP intake on positive and negative mood in healthy adult populations. We have targeted healthy adult men and …
2021109 citationsEFFECTS OF DIETARY L-TRYPTOPHAN SUPPLEMENTATION ON GROWTH, PHYSIOLOGY, IMMUNE RESPONSE, AND GENE EXPRESSION OF …
IJ Mishu - 2025 - hammer.purdue.edu
… can adversely affect their health, immunity, and general performance. This research investigated the impact of dietary L-tryptophan supplementation on physiological and immunological …
2025
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2017-04-25. DSLD Label ID: 72895. 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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