I've been making the stuff myself for a while now and its amazing how much money you can save by using this stuff instead of buying a different pharmaceutical product for every single ailment. I do not know if it can be used internally and thats where all the controversy surrounding this substance comes from but there is no doubt that it has potent antibiotic, antifungal and antiviral properties so it can be used topically, as a mouth wash or inhaled using a nebulizer to treat coughs and pneumonia.
Its clear that the pharmaceutical industries are trying to scare people away from this substance by claiming that there is a high risk of developing argyria when in reality there is about a 1 in a million chance of developing argyria from ingesting ionic silver solutions. Searching colloidal silver the first page that comes up is quackwatches page titled "Colloidal Silver - Risk Without Benefit". What are these risks is what I'm wondering. An extremely low probability of developing argyria, a skin condition which has absolutely no adverse health effects other than some possible adverse mental health effects associated with turning blue haha. They also mention heavy metal poisoning which is pretty much ******** considering one would need to drink buckets of these low concentration solutions to exceed the RDA of silver.
I haven't tried taking this stuff internally but the fact they are trying to scare people away from it coupled with the abundance of testimonies on the internet makes me suspect that this stuff actually does work when ingested internally.