Here are the studies I quoted on this video.
https://medkit.info/2018/07/19/fasting-from-the-secret-that-helps-chronic-pain/
https://www.ncbi.nlm.nih.gov/pubmed/20425196
https://www.ncbi.nlm.nih.gov/pubmed/17374948
https://www.sciencedaily.com/releases/2018/03/180322125024.htm