5-Hydroxy L-Tryptophan®
Amino Acids & ProteinBrand: Progressive Professional from Progressive Laboratories
Functions
Net Contents
30 Capsule(s)
Serving Size
1 Capsule(s)
Servings Per Container
30
Supplement Form
Capsule
Bar Code (UPC/SKU)
3 51821 00833 2
Product Version
Reorder No. 833 Rev. L1819
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.
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 Capsule(s) · 1– per day
| Ingredient | Amount Per Serving | |
|---|---|---|
| 5-Hydroxy-L-Tryptophan | 100 mg | — |
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
Directions: One capsule daily, or more, as directed by a health care professional.
Warnings & Precautions
Precautions re: Pregnant or Nursing or Prescription Medications
Not to be used by pregnant or lactating women.
Precautions re: All Other
Tamper evident band around cap and seal on bottle. Do not use if either seal is broken or missing.
Precautions re: Children
Keep out of the reach of children.
Precautions re: Pregnant or Nursing or Prescription Medications
Warning: Do not take with MAO inhibitors or anti-depressants.
Formulation
Formulation re: Other
Progressive Laboratories manufactured this product in its 3rd party GMP-inspected facility. (Good Manufacturing Practices)
FDA Statements
FDA Statement of Identity
Dietary Supplement
Other Label Statements
General Statements: All Other Content
Sold only for dispensing by a licensed health professional.
Seals/Symbols
GMP Good Manufacturing Practice Certified GMP Compliant 21 CFR 111
Brand IP Statement(s) re: (c), (TM), (SM)
Progressive Professional from Progressive Laboratories
Manufacturer & Distributor
Manufacturer
Progressive Laboratories, Inc.
Irving, Texas, 75038
1-800-527-9512
Market Reference
Progressive Labs 5-Hydroxy L- Tryptophan 30 Capsules
Professional Supplement Center5.0(2)$28.995-Hydroxy-L-tryptophan
Adipogen Life Sciences$33.155-HTP 100% Pure 5-Hydroxy Tryptophan Powder
Optimist$16.00Progressive Labs TryptoPure 90 Capsules
Herbs Direct5.0(1)$43.00Lipotrope Progressive Labs
Blue Sky Vitamin4.8(6)$31.00SEROTONIN CONTROL (5-HYDROXYTRYPTOPHAN)
TikTok Shop$24.905-Hydroxy-L-tryptophan, 1g, CAS# 4350-09-8
Lab Procurement Services$108.50Horbaach 5HTP 400mg 120 Capsules
Walmart - Carlyle Nutritionals, LLC4.7(23)$18.59
Where to Buy Locally
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HYDROXY SYSTEMS P LTD
4.2 (114)Industrial consultant
www hydroxysystems com, B-25, Ashok Nagar Main Rd, Ashok Nagar, Bharat Heavy Electricals Limited, Ramachandrapuram, Hyderabad, Telangana 502032, India
Research & Studies
A Randomized, Double-Blind, Placebo-Controlled, Crossover Study to Evaluate the Safety and Efficacy of the 5-Hydroxytryptophan on REM Sleep Behavior Disorder …
M Meloni - 2018 - iris.unica.it
… the intermediate metabolite of L-tryptophan in the production … is associated with progressive degeneration of dopaminergic … of the serotonin precursor 5-hydroxy-tryptophan (5-HTP). 5-…
20181 citationsInvestigation of the improvement effect of Dajianzhong decoction on rats with post-operative ileus based on serum metabolomics and spectrum-effect …
Z Cong, T Xu, X Kang, Z Zhong, H Zhou… - Frontiers in …, 2026 - frontiersin.org
Frontiers | Investigation of the improvement effect of Dajianzhong decoction on rats with post-operative ileus based on serum metabolomics and spectrum-effect relationship Frontiers in …
2026A heretofore undisclosed crux of eosinophilia-myalgia syndrome: compromised histamine degradation
MJ Smith, RH Garrett - Inflammation Research, 2005 - Springer
… 1989 for LTCDS in which L-tryptophan is the sole or major com… and serotonin at peak excretions in healthy humans [179];24 … Differential release of histamine by 5-hydroxy-tryptamine, …
200543 citationsAcute liver injury following Garcinia cambogia weight-loss supplementation: case series and literature review
G Crescioli, N Lombardi, A Bettiol… - Internal and …, 2018 - researchgate.net
… simplicifolia (75 mg of 5-hydroxy-l-tryptophan). The second was a … ) and developed a rapid progressive liver failure after 7-day … In this context, we believe that healthcare professionals (…
201888 citationsSerotonin-Neurotransmitter and Hormone of Brain, Bowels and Blood: Neurotransmitter and Hormone of Brain, Bowels and Blood
K Fatima-Shad - 2024 - books.google.com
… shared her expertise in medical and biological sciences across … from the essential amino acid L-tryptophan (Trp) which is … of evidence suggest that a progressive and non-linear loss of …
202416 citationsKynurenine metabolites and inflammation markers in depressed patients treated with fluoxetine or counselling
GM Mackay, CM Forrest, J Christofides… - Clinical and …, 2009 - Wiley Online Library
… of 5-HT, its major metabolite 5-hydroxy-indoleacetic acid (5-HIAA), … l-Tryptophan and l-kynurenine were quantified using … 1d) questionnaires showed a progressive decline in depression …
200980 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2022-02-23. DSLD Label ID: 261310. 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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