Peter Grinspoon, M.D. is a primary care physician and a cannabis specialist at Massachusetts General Hospital. He is an Instructor in Medicine at Harvard Medical School. On May 5^th, 2026, his new book: “Aging Well with Cannabis: Feel Better, Sleep Better and Live Better with Marijuana and CBD” will be published. He also is the author of the recent book “Seeing Through the Smoke: A Cannabis Expert Untangles the Truth about Marijuana”. He is a TEDX speaker, works in the addiction clinic at his hospital, and has worked as an Associate Director for the Massachusetts Physician Health Service, helping other physicians with their addictions. He is frequently cited in the national media as a thought leader on cannabis, psychedelics, drugs of misuse, and addiction.