Did you start taking the supplement after consulting with a naturopathic doctor? A herbalist? An acupuncturist? Your medical doctor? A rheumatologist? Did you read about it online? Did a friend rave about it? Or did the salesperson at your local health food store suggest that you take it?
This information is really helpful for your health care providers. People at the health food store don't have your complete health history, so shoppers often end up with supplements that aren't appropriate for them.

