Due to the stigma against products such as colloidal silver, it would likely require
vairagi, you are correct and on point, real solid proof that it actually works as described in the human body is needed.
However, I can tell you from experience that it is far more complicated than that.
Let me give you an example. Supposed that you wanted to prove that it worked on a subcutaneous MRSA infection.
An initial study would take place in a third world country ( usually a certain specific country ), would involve 20 people, half given placebo and the other half given the form of CS that is being verified ( each form would of necessity, need its own study ), the study would take 3 to 4 months and cost over $50,000 US ( I know because I have inquired and received quotations ).
Even If this study had resounding results, it would likely not get published in a major journal or possibly any journal except for some small third world publication.
Due to the stigma against products such as
Colloidal Silver , it would likely require at least 3 to 5 similar studies before anyone in the US would even give the idea any notice at all. However, if a study was done in the US ( highly unlikely because the institute that did the research would likely never receive another study from the pharmaceutical industry ), it would be highly expensive, costing 5 to 10 times the cost of the third world study.
I do not know of any CS manufacturer who could even come close to affording this without doubling their price and be put out of business by the competition.
The only way that this can be accomplished is through public pressure. Posting on facebook, twitter, and instagram, calling for government studies. BTW, I do not generally care for government involvement but when it comes to the common good of the public, that is probably the only logical course.