When I was a teen and suffering from chronic fatigue my mother took me to a homeopath who used a machine that ran a current from a specific point in my hand to my other hand. The machine went through and matched the vibration to numerous things from foods to antibiotics, anything that I had an allergy to would show resistance and any drug etc stored in my adipose tissue also came up. It was really remarkable it came up with over 200 antibiotics stored in my system that my body had been to weak to flush out all left over from me being chronically ill as a child. She then over a few months used homeopathic remedies to clean me out and basically gave me back my bounce. Seeing a gadget bring up so accurately every antibiotic you have ever taken with no prior knowledge of you is quite amazing, and I am not surprised such devices are illegal in places where there is a pre existing dominant interest in maintaining a status quo.