Zeolites For Health... Scam Or Good?

[Qfwfq]

A friend of mine was asking about them. I did a bit of google and there seem to be many folks selling it as a health product, but also suspicions about scam. The section on wiki for its medical uses doesn't make it look certain that it should be used as a nutritional supplement.

 

Is anyone here able to point to any other reliable and accurate (non commercial!) sources? Mostly, does anyone know of evidence that it could be unwise to ingest such products?

 

Thanks in advance.