By the light of the silvery moon...

摘要

Exposure to too much sunlight is unhealthy for us, we are told. We know there are links between sunshine holidays, sunbeds and skin cancer. Conversely we have recendy been informed that too little time spent in the sun is also bad for us. Anyone living north of Birmingham in our dark winter days is unlikely to be producing enough vitamin D. Taking a vitamin supplement has been recommended to prevent rickets, which we had hoped was a problem of the past for children.