From the reading I have done CS is not a poison when used topically or for short periods of time, but when overused can build up in the system causing cell death etc
http://www.newstarget.com/colloidal_silver.html - is a good place to start
I wouldnt drink a cup of it, nor would drink a cup of dettol - but they certainly both have their uses. Oh and isn't tea tree oil a potent poison if ingested? Might smell nice but Im not drinking a cup of that either.
Ill stick to water thanks.