Asthma seems more common than ever before, and vitamin deficiency could be partly to blame.
A low intake of vitamins A and C could raise the risk of asthma, a team which reviewed 40 studies carried out over the past 30 years has said.
A Nottingham University-led team found people with a low intake of vitamin C had a 12% increased risk of asthma, the Thorax journal reported.
For vitamin A the raised risk was less clear cut, the team said, but there was still a significant association. Read more
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