Skip to main content
Intended for healthcare professionals

International Journal of Tryptophan Research is an international, peer reviewed journal that focuses on all subjects related to tryptophan research, including isolation, functionality, interactions, analysis, synthesis and industrial production, as well as supplementation and role in diet, physiology, neurological disorders and immune response. Also of interest to the journal are related precursors and metabolites such as serotonin, melatonin, niacin, tryptamine, kynurenine, and indoleamine 2,3-dioxygenase. View full journal description

This journal is a member of the Committee on Publication Ethics (COPE).

Browse by

Articles most recently published online for this journal.
Restricted access
Research article
First published  

The Effect of L-Tryptophan Intake on Dynamic Strength in Paralympic Powerlifting

  • Márcio Getirana-Mota
  • Felipe J. Aidar
  • Raphael Fabricio de Souza
  • Ciro José Brito
  • Taísa Pereira Santos
  • Jonason Espínola Lacerda
  • Lúcio Marques Vieira-Souza
  • Georgian Badicu
Restricted access
Research article
First published  

Accumulation of Quinolinic Acid Modulates the Pulmonary Immune Response During Influenza Infection

  • Guillaume Pamart
  • Benjamin Hennart
  • Anaïs Ollivier
  • Gwenola Kervoaze
  • Muriel Pichavant
  • Philippe Gosset
  • Olivier Le Rouzic
  • Odile Poulain-Godefroy
Open Access
Research article
First published  

Altered Tryptophan–Kynurenine Pathway and Low-Grade Inflammation in Metabolic Dysfunction–Associated Steatotic Liver Disease (MASLD): Insights from LC–MS/MS–Based Metabolite Profiling

  • Kübranur Ünal
  • Leyla İbrahimkhanlı
  • Mehmet Emre Erol
  • Nemat İbrahimkhanlı
  • Sabri Engin Altıntop
  • Mahi Nur Cerit
  • Ethem Turgay Cerit
  • Halit Nahit Şendur
View latest issues
Most read articles in this journal in the last 6 months.
Open Access
Review article
First published  

Serotonin Syndrome: Pathophysiology, Clinical Features, Management, and Potential Future Directions

  • William J Scotton
  • Lisa J Hill
  • Adrian C Williams
  • Nicholas M Barnes
Open Access
Review article
First published  

Analysis, Nutrition, and Health Benefits of Tryptophan

  • Mendel Friedman
Open Access
Review article
First published  

Kynurenine Pathway of Tryptophan Metabolism: Regulatory and Functional Aspects

  • Abdulla A-B Badawy
Open Access
Review article
First published  

L-Tryptophan: Basic Metabolic Functions, Behavioral Research and Therapeutic Indications

  • Dawn M Richard
  • Michael A Dawes
  • Charles W Mathias
  • Ashley Acheson
  • Nathalie Hill-Kapturczak
  • Donald M Dougherty Ph.D.
View all
Most cited articles published in this journal in the last 3 years. These statistics are updated weekly using data sourced exclusively from CrossRef.
Open Access
Review article
First published  

Kynurenine Pathway in Respiratory Diseases

  • Guillaume Pamart
  • Philippe Gosset
  • Olivier Le Rouzic
  • Muriel Pichavant
  • Odile Poulain-Godefroy
Open Access
Review article
First published  

A Review of the Evidence for Tryptophan and the Kynurenine Pathway as a Regulator of Stem Cell Niches in Health and Disease

  • Benjamin Sebastian Summers
  • Sarah Thomas Broome
  • Tsz Wai Rosita Pang
  • Hamish D Mundell
  • Naomi Koh Belic
  • Nicole C Tom
  • Mei Li Ng
  • Maylin Yap
  • Monokesh K Sen
  • Sara Sedaghat
  • Michael W Weible
  • Alessandro Castorina
  • Chai K Lim
  • Michael D Lovelace
  • Bruce J Brew
Open Access
Research article
First published  

The Tryptophan Metabolite Indole-3-Propionic Acid Raises Kynurenic Acid Levels in the Rat Brain In Vivo

  • Korrapati V Sathyasaikumar
  • Tonali Blanco-Ayala
  • Yiran Zheng
  • Lilly Schwieler
  • Sophie Erhardt
  • Maximilian Tufvesson-Alm
  • Burkhard Poeggeler
  • Robert Schwarcz
Open Access
Research article
First published  

Kynurenine Metabolites in CSF and Plasma in Healthy Males

  • Funda Orhan
  • Lilly Schwieler
  • Göran Engberg
  • Martin Samuelsson
View all
Articles with the highest Altmetric score from the last 3 months, indicating influence and impact.
Published Special Collections
Open Special collections

You might be interested in

Publishing model change

From 1st September 2024 International Journal of Tryptophan Research will convert from Open Access to a Hybrid publication model. Click here for more details.

Learn More

Call for papers

IJTR invites original manuscripts for peer review on a wide range of topics related to Tryptophan.
Read More

Publish with us

Authors will enjoy:

  • Rigorous peer review of your research
  • Prompt publishing
  • Multidisciplinary audience
  • High visibility for global exposure
Submit Now

Call for reviewers

IJTR is seeking peer reviewers with diverse expertise in Tryptophan research.
Learn More

Information for Authors, Editors, and Reviewers

Sage supports authors, editors, and reviewers throughout all steps of the publishing process. Explore our resources:

Sage discipline hubs

Explore the content from across our disciplines, including the latest journal articles, special issues, and related books and digital library content.
View More

Learn about our Special Collections

Open your research with confidence

Discover more about Sage Gold Open Access including our Special Collections and flagship titles. From endocrinology to ethnography, we publish a broad range of over 200 journals.
Learn More

Also from Sage