RE: Colloidal Silver
I've seen plenty of compelling research, and have also used it plenty of times in the past. I'm happy it does what it says on the tin!
There are marked differences in quality regarding silver particle size between products - so ppm isn't always a guarantee of strength - i.e. a low ppm of very fine silver particles is better than a high ppm of large ones.
If it was in some way patentable/protectable as a product, I'm positive that the pharma boys would of done something big with it by now. Elastoplast are the biggest non health-food arena that I've seen silver in, but that's because they will of been able to protect its use in plasters - great use in fairness!