Thanks to Trade Coffee for sponsoring this video! Get 50% OFF your first bag of coffee with Trade Coffee when you use my code Ragusea50: http://cen.yt/traderagusea7

Thanks to Leticia & Harry Hutchins at Alma Coffee in Canton, Georgia: https://myalmacoffee.com/

"Comparative study of polyphenols and caffeine in different coffee varieties affected by the degree of roasting," Food Chemistry
Volume 129, Issue 3, 1 December 2011 (not free): https://www.sciencedirect.com/science...