If concrete proof is needed, it will not be found in words. Science says we can split the atom!! It has been accepted yet you can't even see an atom to know for sure it is there. Having a lab analysis is taking the word of someone who can make errors. It amazes me the way people put blind faith in western medicine simply because there is a framed certificate hanging on the wall, yet those same people demand "proof" of an age old wisdom called alternative therapy. Western medicine is used in a profession called medical practice. Surely that word "practice" is a bit unsettling, don't you agree??? The bottom line is, did it work for you?