5-Hydroxy L-Tryptophan®

Amino Acids & Protein

Brand: Progressive Professional from Progressive Laboratories

CapsuleAmino acid/ProteinOn Market
Click to view full label

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.

1Active Ingredients

Single-ingredient formula listed in Supplement Facts.

100%Amount Transparency

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

IngredientAmount Per Serving
5-Hydroxy-L-Tryptophan100 mg

Not Present

Other Ingredients

Rice FlourVegetable LubricantGelatin

Target Groups

Adult (18 - 50 Years)Women (not pregnant or lactating)

Label Claims

All Other

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

$9.99 – $471.75· 32 listings
  • Progressive Labs 5-Hydroxy L- Tryptophan 30 Capsules

    Professional Supplement Center5.0(2)
    $28.99
  • 5-Hydroxy-L-tryptophan

    Adipogen Life Sciences
    $33.15
  • 5-HTP 100% Pure 5-Hydroxy Tryptophan Powder

    Optimist
    $16.00
  • Progressive Labs TryptoPure 90 Capsules

    Herbs Direct5.0(1)
    $43.00
  • Lipotrope Progressive Labs

    Blue Sky Vitamin4.8(6)
    $31.00
  • SEROTONIN CONTROL (5-HYDROXYTRYPTOPHAN)

    TikTok Shop
    $24.90
  • 5-Hydroxy-L-tryptophan, 1g, CAS# 4350-09-8

    Lab Procurement Services
    $108.50
  • Horbaach 5HTP 400mg 120 Capsules

    Walmart - Carlyle Nutritionals, LLC4.7(23)
    $18.59

Where to Buy Locally

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

  • 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 citations
  • Investigation 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 …

    2026
  • A 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 citations
  • Acute 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 citations
  • Serotonin-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 citations
  • Kynurenine 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.