Dr Ulugbek Nurmatov, Devereux and Sheikh reported that vitamins A, C and E could help prevent asthma in April 2012.
They were only effective against asthma, though, because the researchers found no evidence of the same effects on other allergies.
"Conclusion: The available epidemiologic evidence is weak but nonetheless supportive with respect to vitamins A, D, and E; zinc; fruits and vegetables; and a Mediterranean diet for the prevention of asthma. Experimental studies of these exposures are now warranted." Allergy and Respiratory Research Group, The University of Edinburgh, Scotland, UK