Accoroding to the latest research it has been shown that taking far more vitamin D than initially thought to be enough. New daily doses could be in a range of more than 4000 IU
“We found that daily intakes of vitamin D by adults in the range of 4,000-8,000 IU are needed to maintain blood levels of vitamin D metabolites in the range needed to reduce by about half the risk of several diseases — breast cancer, colon cancer, multiple sclerosis and type 1 diabetes,” study co-author Dr. Cedric Garland, a professor of family and preventive medicine at the University of California at San Diego, said in a university news release.
Garland and his colleagues suggested that 4,000 IU a day is a safe level, after the new researches — which also involved the Creighton University School of Medicine in Omaha — was based on a survey of few thousand people who were taking supplements ranging from 1,000 to 10,000 IU per day. The volunteers also have been going uder blood tests to determine the levels of vitamin D metabolites circulating in their blood.