Fasting and ketones
If you stop eating food and the glucose is used up, the body starts to burn fat. Ketones are released, which then supply energy to the brain and other organs. Author: 3sat/nano, Spiegel TV, Liz Wieskerstrauch, O. Gurr, R. Heinze, D. Ritter, J. Staiger, Jan Cords, tricky GbR Translation & redub: a