The experts now recommend testing every two years for that age group.
VOA: special.2009.11.18
It currently recommends But many experts,including Dr.Irwig, recommend adults take 1,000 to 2,000 units a day, an amount only possible to get though supplements.
VOA: standard.2010.05.28
Nevertheless, given the stock's rapid climb, many expertsrecommend an overall exposure of 3% to 5%.