Nano-SilverSol: Using science and technology the molecular structure of Optivida Health's silver has been improved to ensure that it is safe and effective. It safely targets and kills harmful pathogens in the body. It doesn't build up in the body and safely exists after 24 hours. You'll be happy to know that this nano-silver has almost nothing in common with colloidal silver except the word silver.

Colloidal Silver: In 1999 the FDA warned against the use of colloidal silver because it isn't safe or effective. Many colloidal silver companies make fictitious claims about benefits and cures that aren't backed by science. Although rare, an excess of colloidal silver can build up in the body causing Argyria. Argyria is a skin condition that can turn the skin, internal organs, nails, and gums a blue-gray color.