After making headlines at the Tour De France last year, carbon monoxide supplementation is under the microscope. Emergency room physician and triathlete Dr. Jeff Sankoff sheds light on this risky practice.

Researchers attempted to answer questions on the safety and effectiveness of CO rebreathing in a recent paper published in the Journal of Applied Physiology.

Carbon Monoxide Rebreathing: Training Hack or Death Trap? – Triathlete