About Metabolism therapy for a healthy body

For a long time, we hear more and more about the Stoffwechselkur, where individuals can lose as much as 10 % of their weight, so reasonable 5-12 Kilogramm pure fat mass - without the yo-yo result. What is it about the metabolic rate treatment?
http://webnews.de/1769468/21-tage-stoffwechselkur-passiert-da-ueberhaupt-nachhaltig-schlank