Info abt beneficial substances granted, there is a caution indicated in that it is URINE that is tested to evaluate the effectiveness and need for chelation of toxic metals.
Do the chelated complexes of toxic metal+chelating agent just pass right through the digestive system without being re-adsorbed??? Are they absorbed if we have a leaky gut/ faulty intestinal barrier, but not if the gut is healthy?
Perhaps those most likely to have a large toxic load should consider starting out using UT homeopathically, in VERY VERY SMALL AMMOUNTS. (I've seen 1-10 DROPS per glass of water suggested.)