CP) - People who take vitamin D supplements appear to have a lower risk of death from any cause, an analysis of numerous studies has found, adding to the weight of evidence suggesting that the "sunshine nutrient" confers widespread health benefits.
In an analysis of data pooled from 18 randomized controlled trials, researchers at the International Agency for Research on Cancer and the European Institute of Oncology found that subjects who took at least 500 international units of vitamin D daily had a seven per cent lower risk of death, on average, compared with control groups given a dummy pill.
The 18 clinical trials involved a total of more than 57,000 subjects, who were followed for almost six years. Most of the studies, with participants mainly over age 65, were investigating the role of vitamin D in keeping bones strong and preventing fractures.
In the nine trials that collected blood samples, participants who took supplements had an average 1.4-to 5.2-fold higher blood level of vitamin D than those who did not, the analysis shows.
Previous studies have suggested that vitamin D deficiency may be linked to a higher risk of dying from cancer, heart disease and diabetes - illnesses that account for 60 per cent to 70 per cent of deaths in high-income countries, the authors say.
"If the associations made between vitamin D and these conditions were consistent, then interventions effectively strengthening vitamin D status should result in reduced total mortality," the authors write.
Researchers can't say for sure what it is about vitamin D that seems to improve health and apparently prolong life.
"It's still a little bit obscure," co-author Dr. Philippe Autier, chief of epidemiology and biostatistics at the Agency for Research on Cancer, said Monday from Lyon, France. "There's one area of research quite recently that showed that vitamin D had the possibility to delay, to r******, the progression of certain diseases, essentially cancer and some cardiovascular diseases."
http://www.mytelus.com/ncp_news/article.en...ticleID=2751225
