vitamin D. professor of medicine at Creighton University in Nebraska, US, will describe a trial showing how Vitamin D and calcium supplements given to cancer patients dramatically improved survival. The trial was originally designed to assess the effects of the supplements on osteoporosis, the bone-thinning disease, and only later switched to examine their effects on cancer. Other papers will present results of the effect of vitamin D on bowel cancer and adenocarcinoma, a cancer of the skin and other tissues. Professor Dalgeish said he had been intrigued by research on patients with melanoma by the University of Leeds which showed that those with the lowest level of Vitamin D in their blood had the poorest outlook. They were 30 per cent more likely to suffer a recurrence of the disease after treatment than those who had the highest levels. "It was the most staggering thing. When we had a validated test and looked at our patients [at St George's] the majority were low. I am trying to get my colleagues to look at all their cancer patients.