There is a protective layer of mucus covering the walls of the stomach so that the gastric juices don't actually digest the stomach (just the stuff inside the stomach).
People become skeptical due to the overflowing abundance of scientific evidence that backs more proof with certain treatments. It makes people more comfortable over all if it is more tested. It would help prove theories if people were more skeptical, since they didn't think it would work previously.
No you shouldn't mainly because it is not in your scope of practice. there will be legal consequences if you are caught and you are not licensed to administer medication
