Mark Sisson chats with Dr. Joseph Mercola - a board certified family physician who started Mercola.com 20 years ago...the most visited natural health site on the internet for the last 13 years. He has also authored many bestselling books including Fat for Fuel which details mitochondrial metabolic therapy.  Mark Sisson and Dr. Mercola discuss topics ranging from intermittent fasting, KETO, stem cell therapy, mitochrondrial impairment, stem cell therapy, and issues around EMF.