AUTHOR=Gatterer Hannes , Dünnwald Tobias , Woyke Simon , Faulhaber Martin , Schumacher Yorck Olaf , Schobersberger Wolfgang 

TITLE=Low-dose carbon monoxide inhalation to increase total hemoglobin mass and endurance performance: scientific evidence and implications

JOURNAL=Frontiers in Physiology

VOLUME=15

YEAR=2024

URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1490205

DOI=10.3389/fphys.2024.1490205

ISSN=1664-042X

ABSTRACT=<p>Recently, chronic intermittent inhalation of low-dose carbon monoxide (CO) has been postulated as a practice to increase total hemoglobin mass with potential beneficial effects on endurance performance. In this perspective article, we discuss the potential performance enhancing capabilities as well as the safety concerns, which include individual variability in CO response, and acute and chronic health effects. It is also important to note that according to the World-Anti-Doping-Agency (WADA), CO inhalation could fall under “<italic>M1. Manipulation of Blood and Blood Components</italic>“ and therefore could be considered a prohibited method if used as a non-diagnostic tool.</p>