There are 2 kinds of Colloidal Silver :
1) Ionic Silver which is extremely effective to kill pathogens.
2) Particulate Silver which has been proven to be far less effective.
Mesosilver is among the Particle silver brands.
Here is a list of the superior Ionic Silver brands:
Ionic Silver Products Recommended
Argentine 23 for Doctors - 95% Ionic
Advanced Ionic Silver
Utopia Ionic Silver
Good State Ionic Silver
Invision Silver Optisilver 100 - Theory
Sovereign Silver (Hydrosol Ionic) (N1)
Silver Hydrosol Ionic
Naturally Sourced Silver H2O