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. The chapters are organized alphabetically by supplement to make it easy for a physician to reference which one they are specifically looking for. There are eight chapters total as well as an introduction and conclusion. Each supplement is broken down into subsections such as what is it and howit works in the body, what is it used for and at what dosage, evidence for or against its different uses, safety concerns, side effects, and precautions and interactions with other medications.  Written by experts in the field,  An Evidence-Based Guide to Supplements  appeals to practicing physicians of every specialty that interact with patients. Supplements are asked about in almost every medical office but especially with primary care physicians, neurologists, psychiatrists, pediatricians, geriatric medicine professionals, pain medicine specialists and rheumatologists.