Peter Grinspoon, MD, is a primary care physician at Massachusetts General Hospital and an Instructor at Harvard Medical School. He is the author of the forthcoming (4/20/23) book, Seeing Through the Smoke: A Cannabis Specialist Untangles the Truth About Cannabis, as well as the memoir Free Refills: A Doctor Confronts His Addiction. He is a TedX speaker. He spent two years as an Associate Director of the Massachusetts Physician Health Service helping physicians with addiction and mental health issues. He graduated with a B.A. in Philosophy with honors from Swarthmore College. He then spent five years as a Campaign Director for the environmental group Greenpeace before entering medical school at Boston University School of Medicine, where he graduated with honors. He completed his residency at Harvard’s Brigham and Woman’s Hospital, in the primary care program. He has been on national television including NBC, C-SPAN, and Fox and Friends, and his writings have been published in The Nation and The Los Angeles Times. He is a Contributing Editor to Harvard Health Publications.