In this interview, Dr. Richard Birtwhistle discusses the recommendations in the clinical practice guideline on screening asymptomatic adults for thyroid dysfunction. The guideline comes from the Canadian Task Force on Preventive Health Care and is published in CMAJ.Dr. Birtwhistle is a family physician, clinical epidemiologist, and emeritus professor of family medicine and public health sciences at Queen’s University. He is also chair of the working group for screening for thyroid dysfunction and previous vice chair of the Canadian Task Force or Preventive Health Care. To read the clinical practice guideline published in CMAJ: www.cmaj.ca/lookup/doi/10.1503/cmaj.190395Podcast transcript: https://www.cmaj.ca/transcript-190395-----------------------------------Subscribe to CMAJ Podcasts on Apple Podcasts or your favourite podcast app. You can also follow us directly on our SoundCloud page or you can visit www.cmaj.ca/page/multimedia/podcasts.