In America, use of vitamins, nutritional supplements, and herbs is common, ranging from 10 to 95%. In my practice it is about 50%. But shockingly, a new study http://bit.ly/YVzEAx shows that between 20% to 77% of people who were using complementary or alternative medicines did NOT tell their doctor about which complementary or alternative therapies they were taking. People said they kept this a secret because the doctor never asked, or they were afraid of criticism by the physician. But some of these complementary treatments can interfere with standard medicines and drugs, or have side effects that can be dangerous.
What are my tips for you:
Make a list of all the vitamins, herbs and supplements you use and give it to your doctor.
Never be afraid to talk these issues over with your doctor, as I describe more fully in Chapter 7 communicating with Your Doctor in my book Surviving American Medicine.