ROME — Pope Francis was in critical condition Saturday after he suffered a long asthmatic respiratory crisis that required high flows of oxygen, the Vatican said. The 88-year-old Francis ...

An article published this week in The Lancet medical journal found that more than half of the world’s population lacks access to safe and affordable medical oxygen services, and most people ...

Oxidative stress is an imbalance of free radicals and antioxidants in the body that can lead to cell and tissue damage. Evidence suggests that long-term oxidative stress contributes to the ...