Vitamin D deficiency Around 50% of adults have low vitamin D levels. Dr Louise R Newson discusses investigation and prevention of vitamin D deficiency in primary care and provides advice on managing rickets and osteomalacia. by Dr Louise R Newson 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