Welcome to Impact Factor, your weekly dose of commentary on a breaking medical study. This week, we’re going green with a look at a study appearing in JAMA Network Open that takes the lead for my favorite sentence ever to appear in a medical journal: “Historically, cannabis has predominantly been smoked using various implements such
vaping pot
Cannabis vapor has less tar, but may contain more ammonia. What happens to respiratory symptoms when regular users of joints, blunts, pipes, and bongs switch to a vaporizer? Subscribe to Dr. Greger’s free nutrition newsletter at http://www.nutritionfacts.org/subscribe and get a free excerpt from his latest NYT Bestseller HOW NOT TO DIE. (All proceeds Dr. Greger