Vitamin A deficiency doesn’t affect asthma onset

Vitamin A deficiency does not increase the risk of asthma, according to scientists at Johns Hopkins University, who analysed over 5,000 people living in a rural area of Nepal. They assessed whether taking vitamin A supplements at an early age altered the risk of developing of asthma.

In developing countries, vitamin A deficiency is particularly common and previous research has shown that it harms the development of the lungs.