I also exercise regularly since I was in highschool and have always been active. I do a lot of cardio , average of 1 hour to 1.5 hours non stop on the eliptical machine (cross trainer), plus I do weights. But my friends are teasing me due to my enormous appetite. I have always enjoyed good food all my life. I'm worried hearing that Zhen de Shou contains amphetamines. Is this true? Can somebody verify this scientifically? Thanks for your help.