COLLOIDAL Silver: Despite what the Mayo Clinic Says, there does appear to be something to colloidal silver.
Scientific America’s piece on the potential benefits of silver and its anti-microbial properties. http://www.scientificamerican.com/article/silver-makes-antibiotics-thousands-of-times-more-effective/
Products vary wildly and most don't have the listed strength.
http://www.resultsrna.com/advanced-cellular-silver-200-extra-strength/ is one of the best brands on the market
Some of the more popular brands contain very little colloidal silver. There are few websites that present the test results.
Botto-line: There is very little substantial research on the benefits of colloidal silver, I would not make it a daily part routine. There are much more impactful and proven ways to improve your health, given the current research. But potentially could help