Of course I was not thinking of undiluted HCL, rather than a 2%-9% HCL concentration. At that concentration level it should be reasonably safe to deal with, at least more safe than Miracle-Mineral-Supplement with a 28% NaCLO2. I would doubt that you could get a much stronger HCL anywhere without being warned appropriately. I have read somewhere that in the human stomach an average of about 0.3%-0.5% HCL is present. Would there be concerns regarding an intake of up to 20 drops of %9 HCL in one glass of water ?