Another reason to top up your Vitamin D
As detailed on the BBC website today, research over nine clinical trials, taking Vitamin D supplements in addition to asthma medication appears to cut the risk of severe asthma attacks. So make sure you get outside into the sunshine - 20-30 minutes a day, whilst it lasts.
You can read more at http://www.bbc.co.uk/news/health-37275
As Vitamin D is a fat soluble vitamin, you do need to have your Vitamin D levels tested before taking any Vitamin D supplement.