Sunlight and medication

Prescribed medication isn't always effective, and Professor Erik Eliasson from the Karolinska Institute in Sweden suggests that the weather may be a factor in how medications work. The answer may be in our vitamin D levels, which go up in summer and down in winter, and this could have health implications for people who are taking medication for serious conditions. While the research is still preliminary, this information is not to be missed. From the Tonic series produced with the assistance of NPS. First screened on ABC2 in Australia.