date:Aug 11, 2023
air a person can breathe out in one second (forced expiratory volume or FEV1) and the total volume of air they can breathe in one forced breath (forced vital capacity or FVC).
The researchers found that people with markers of low levels of vitamin K had lower FEV1 and lower FVC on average. People with lower levels of vitamin K were also more likely to say they had COPD, asthma or wheezing.