Can face masks lead to CO2 poisoning?

Face masks do not cause CO2 poisoning. This is a misconception spread by some people, but it is not supported by scientific evidence.

Masks, including surgical masks and cloth masks, are designed to allow breathing while blocking droplets. They allow air to pass through, meaning oxygen can be inhaled and carbon dioxide can be exhaled.

CO2 molecules are very small and can easily diffuse through most mask materials. This means that CO2 produced during exhalation is not trapped in the mask in significant quantities.

Surgical masks and N95 masks have been used safely and effectively by healthcare workers for many years, often for long periods of time. There is no evidence that this has led to CO2 poisoning or hypercapnia (a dangerously high concentration of CO2 in the blood).

Several studies have shown that wearing masks does not significantly affect blood gas levels in healthy people. This is also true for people who wear masks for extended periods of time, such as healthcare workers.

It is important to follow the science and not spread unsubstantiated claims that could harm public health. Face masks are a proven effective measure to reduce the spread of infectious diseases such as COVID-19 without harmful effects on the respiratory system of healthy individuals.

Source: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public/myth-busters

Author: Prof. Dr. Dirk Devroey - Latest update: 2023-12-12 - Copyright: Clinifacts 2024