Show notes and links:

http://www.npr.org/templates/story/story.php?storyId=104240746

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3680567

http://www.npr.org/sections/health-shots/2017/05/01/526069419/fasting-studies-clash-with-our-desire-to-eat-what-we-want-when-we-want-it

http://www.sciencemag.org/news/2017/02/five-day-fasting-diet-could-fight-disease-slow-aging

http://www.beliefnet.com/Faiths/2001/02/Fasting-Chart.aspx