U.S. National Institutes of Health said that it's to launch a large-scale clinical trial to investigate if a vitamin D supplement helps prevent or delay type 2 diabetes in adults who have prediabetes, and are at high risk for developing type 2.

 Two compounds found in red grapes and blueberries may help boost the human immune system, a U. S. study said Tuesday.

 Taking vitamin D supplements in pregnancy seems to make no difference to a child's bone health, in contrast to guidelines in some countries, research published in The Lancet says.