Throughout history for more than 2400 years, silver had been used to improve human health. Silver vessels were used by ancient Greeks, Romans, Egyptians and Phoenicians to preserve drinking water. Hippocrates first described silvers antimicrobial benefits and wrote about it's healing and anti disease properties.
Today, silver is used in medical devices such as catheters and entodtracheal tubing to prevent infections. And the most common burn treatment cream is silvadene cream which is silver based.
The safety and effectiveness has been well documented. It can't hurt you and it probably will help you stay healthy. (Don't worry, you won't turn blue from it either.)
Colloidal silver can be used topically, in a nasal spray and also ingested. It can prevent chronic infections such as cellulitis and it can help good sinus health when used in a nasal spray. Most of my patients who use the nasal spray also state that their allergies are dramatically improved.
If you have problems with chronic infections and you want to avoid repeated antibiotic use then give colloidal silver a try.