Rising carbon dioxide levels are being detected within the human body, with new research warning a key blood marker for the gas could near its healthy limit within decades if current trends continue.

What we breathe out becomes fuel for forests. But inside our own bodies, CO₂ has a secret life. It sparks chemical reactions, shapes metabolism, and may even act as a signaling molecule—and a new tool ...

Chronic hypoxia improves glucose tolerance in mice through insulin-independent mechanisms, with red blood cells acting as a major systemic glucose sink. Increased erythrocyte production and altered ...