Nutritional supplements are ubiquitous. A physician may be asked 10-20 times a day about various supplements. That same physician ends up relying primarily on the internet for information about the supplements. Currently, there is no single, easy-to-use reference for a physician to access to learn about the evidence behind different common supplements. This text fills that gap by allowing physicians to be able to educate themselves and their patients about important supplements in terms of what the data actually says about those supplements, how they work or don't work on different problems and also how those supplements may interact with a patient's medications.