Hi Ruthierhyme, many thanks!
I found it mentioned on several links (hinted at the research behind it, rather)
https://www.vitamindcouncil.org/heal...itions/asthma/ and also
http://www.medicalnewstoday.com/articles/284602.php
and also a more reliable source (NHS)
http://www.nhs.uk/news/2013/05May/Pa...re-asthma.aspx
Thank you very much for your wishes, I'm almost there :)!