Since marijuana became legal in many states, people of all ages are using it for pain relief and treatment of a variety of illnesses and ailments. But is it safe? In this comprehensive book, renowned psychiatrist and licensed prescriber of medical marijuana Dr. Rebecca Siegel delivers the most complete guide yet about the benefits and risks of using marijuana today. Based on the latest scientific research, this accessible book busts all the myths and helps you navigate the sometimes confusing and often-changing world of marijuana. You'll discover a wealth of invaluable information, including: why medical marijuana is vastly different than CBD and recreational marijuana--especially when it comes to children and teenagers; evidence-based information on how cannabis is being used to treat an array of ailments and conditions; the difference between various marijuana delivery systems, including edibles; why those who may be genetically vulnerable to psychiatric disorder, including depression and anxiety, should exercise caution when using marijuana; how to talk to teens or young adults about recreational marijuana use in a way that brings you closer; how marijuana affects mood, productivity, and overall brain health; and long-term vs. short-term risks for teens, adults, and older adults.