Skin cancer is a big problem. Sunscreen can help protect your skin. All this is very well known. It turns out, though, that the active ingredients in sunscreen can get into peoples' bloodstreams in pretty high concentrations. And the effects of sunscreen on the environment isn't well studied. While sunscreen probably is safe for human use, and might be bad for the environment, we should still look closely at the products we're using to protect ourselves. Related HCT episodes: 1. Sunscreen Works, if You Use it Right: https://youtu.be/bvG4sy_YfXM Be sure to check out our podcast! https://www.youtube.com/playlist?list=PLkfBg8ML-gInFaYyYhKLBp2u7h5IojTw4 Other Healthcare Triage Links: 1. Support the channel on Patreon: http://vid.io/xqXr 2. Check out our Facebook page: http://goo.gl/LnOq5z 3. We still have merchandise available at http://www.hctmerch.com 4. Aaron's book "The Bad Food Bible: How and Why to Eat Sinfully" is available wherever books are sold, such as Amazon: http://amzn.to/2hGvhKw Credits: John Green -- Executive Producer Stan Muller -- Director, Producer Aaron Carroll -- Writer Mark Olsen – Art Director Meredith Danko – Social Media