L-Tryptophan 1000 mg®
Amino Acids & ProteinBrand: Protocol For Life Balance
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 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 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: 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: 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
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.*
Brand IP Statement(s) re: (c), (TM), (SM)
Every lot of Protocol For Life Balance(R) L-Tryptophan is tested to be free of Peak E and microbial contamination.
General Statements: All Other Content
Formulated by doctors and clinical scientists exclusively for licensed healthcare practitioners.
General Statements: All Other Content
• Premium Grade • Supports Relaxation* • Encourages Positive Mood* • Promotes Restful Sleep*
Seals/Symbols
GMP
General Statements: All Other Content
Please Recycle.
General: Product/Version Code
CODE P0169 V3
Manufacturer & Distributor
Manufacturer
Protocol For Life Balance(R)
395 S. Glen Ellyn Rd., Bloomingdale, IL, 60108, USA
Other
Market Reference
Protocol For Life Balance L-Tryptophan 500 mg
Covenant Health Products4.7(143)$38.00Best Naturals L-Tryptophan mg 60
Target4.5(135)$9.99LowestProtocol 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 Prescriptions4.7(41)$72.50Protocol for Life Balance Clinical Stress Relief 60 Capsules
Supplement First4.8(32)$33.00Vitamatic L- Tryptophan 1000mg 120 Tablets
Target4.7(384)$14.99
Where to Buy Locally
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Wave 71 Nutrition
4.4 (29)Sports nutrition store
2308 30th St, Spirit Lake, IA 51360
Midwest Health Foods
4.7 (3)Health food store
512 Grand Ave, Spencer, IA 51301
Total Nutrition and Smoothies
4.4 (16)Sports nutrition store
19 W 4th St, Spencer, IA 51301
Crav'n Nutrition
4.2 (10)Sports nutrition store
502 Southmoor Dr, Spencer, IA 51301
Wilder Thymes Natural Foods
4.9 (33)Natural goods store
711 16th St, Spirit Lake, IA 51360
MEGAN & CO. Herbal Apothecary and Teahouse
4.9 (33)Herbal medicine store
1711 Hill Ave, Spirit Lake, IA 51360
Hy-Vee Clinic Pharmacy
4.9 (16)Pharmacy
1012 Okoboji Ave, Milford, IA 51351
Walmart Supercenter
3.8 (1862)Department store
2200 17th St, Spirit Lake, IA 51360
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 2013-07-25. DSLD Label ID: 23609. 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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