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 V1
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, Organic, Gluten-Free.
This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.
Allergen Guide
Contains
- Milk
- Egg
- Shellfish
- Wheat
- Soy
- Gluten
Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.
Supplement Facts
Serving Size: 1 Tablet(s) · 1–3 per day
| Ingredient | Amount Per Serving | |
|---|---|---|
| L-Tryptophan | 1 g | — |
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 or as directed by your health care practitioner. Best used at bedtime.
Warnings & Precautions
Precautions re: All Other
Do Not Eat Freshness Packet. Keep in Bottle.
Precautions re: Children
Warning: Keep out of reach of children.
Precautions re: Pregnant or Nursing or Prescription Medications
Pregnant/lactating women, those taking anti-depressant medications (such as SSRI's or MAOI's), or those with liver disorders, consult a health care professional before using this product.
Precautions re: All Other
May cause drowsiness.
Precautions re: All Other
Cautions and Interactions A frequent side effect from high dose tryptophan use is drowsiness; it is advisable to take L-Tryptophan in the evening and not while driving heavy machinery. Dry mouth and gastrointestinal upset are among the small number of relatively uncommon side effects.
Precautions re: Pregnant or Nursing or Prescription Medications
May interact with monoamino oxidase inhibitors / selective serotonin reuptake inhibitors (SSRIs). Individuals with liver cirrhosis should avoid tryptophan supplementation.
Storage
Storage
Store in a cool, dry place.
Formulation
Formulation re: Vegetarian/Vegan
Vegetarian Formula
Formulation re: Does NOT Contain
Contains no sugar, salt, yeast, wheat, gluten, soy, milk, egg, shellfish, or preservatives.
Formulation re: Vegetarian/Vegan
Vegetarian/Vegan Product.
Formula re: Contains
This product contains an Ageless(R) anti-oxygen packet to enhance protection during storage.
FDA Statements
FDA Disclaimer Statement
These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.
FDA Disclaimer Statement
A Dietary Supplement
Other Label Statements
General Statements: All Other Content
Please Recycle.
General: Product/Version Code
CODE P0169 V1
General Statements: All Other Content
- Pharmaceutical Grade - Promotes Positive Mood - Supports Restful Sleep 10% of profits donated for health research
Seals/Symbols
GMP
General Statements: All Other Content
Made in the U.S.A.
Brand IP Statement(s) re: (c), (TM), (SM)
Protocol For Life Balance(TM) L-Tryptophan is Pharmaceutical Grade (USP).
General Statements: All Other Content
Peel Here for more information
General Statements: All Other Content
L-Tryptophan is an essential amino acid, which means it cannot by synthesized by the human body and therefore must be part of the diet or supplementation. The best sources for tryptophan are high-protein foods such as dairy products, fish, many nuts, and poultry. Some other sources of tryptophan are oats, bananas, and dried dates. In the brain, tryptophan is converted to serotonin, a neurotransmitter that affects mood, as well as satiety signals. Because some serotonin is used by the pineal gland to make melatonin, tryptophan is also important for the maintenance of health sleep-wake cycles. Tryptophan is also critical for the production of the proteins in muscle, hair, and skin. Unfortunately, tryptophan is not abundant in the diet and most people get less than 1.5 grams of tryptophan a day. Furthermore, ingested tryptophan is needed for many other biochemical processes and it competes with other amino acids to enter the brain. This can dramatically affect the amount of tryptophan that is available for conversion to neurotransmitters in the brain.
General Statements: All Other Content
Guaranteed Quality This is an FDA-regulated dietary supplement that is produced in an FDA- and third party-inspected facility. We are certified for producing dietary supplements and USDA Organic products using Good Manufacturing Practices (GMP). All ingredients are quality tested to meet or exceed specifications. Our quality team goes above and beyond standard quality control to ensure the safety and efficacy of this supplement. We utilize advanced analytical and microbiological testing methods, with capabilities that are state-of-the-art and exceed basic lab requirements.
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. In the brain, tryptophan converts serotonin, the neuro-transmitter that is responsible for feelings of well-being, calmness, personal security, relaxation and confidence. Serotonin is also involved in maintenance of a healthy appetite. Some serotonin is converted in the pineal gland to melatonin, which helps to regulates sleep patterns. Protocol For Life Balance(TM) L-Tryptophan is pharmaceutically pure - every lot is tested to be free of Peak E and microbial contamination.
Manufacturer & Distributor
Manufacturer
NHG
P.O. Box 2203, Sparks, NV, 89431
Market Reference
Vitamatic L- Tryptophan 1000mg 120 Tablets
Target4.7(384)$14.99Protocol For Life Balance L-Tryptophan 500 mg
Covenant Health Products4.7(143)$38.00Now Foods L-tryptophan 1000mg Tablets (60-Count)
Walmart - Fruitful Yield4.2(4)$43.58Protocol for Life Balance L Glutamine
iHerb4.9(66)$27.00Best Naturals L-Tryptophan mg 60
Target4.5(135)$9.99Protocol For Life Balance 5-HTP 100mg 90 Capsules
Walmart - Pattern4.8(83)$30.00L-Tryptophan Pure Encapsulations
Pure Prescriptions4.7(41)$72.50Protocol for Life Balance Clinical Stress Relief 60 Capsules
Supplement First4.8(32)$33.00
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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 2012-06-25. DSLD Label ID: 10031. 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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