New vitamin D guidelines aim to provide clarity on testing and prescribing Dr Terry Aspray explains what the National Osteoporosis Society's new clinical guidelines on vitamin D and bone health mean in practice for GPs. by Dr Terry Aspray Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up