# Vitamins A and D linked to improved lung function in asthma patients > Source: > Published: 2026-07-01 14:13:29+00:00 # Vitamins A and D linked to improved lung function in asthma patients - A study by US researchers suggests that higher levels of [vitamins](/topic/vitamins)A and D could boost lung function in children and adults with[asthma](/topic/asthma). - The research, published in the journal Thorax, analysed data from 1,165 children and 1,041 adults with asthma, measuring their vitamin levels and lung capacity. - The findings indicated that both children and adults with asthma who had higher vitamin A levels exhibited better lung function. - Among adults with asthma, higher vitamin D levels (at least 30 ng/ml) were associated with improved lung function and less evidence of epigenetic ageing, suggesting a potential role in slowing biological ageing. - Experts have cautioned that while these findings open new avenues for investigation, further studies are required to clarify the causal relationship between vitamin D, biological ageing, and lung health.