Absolutely.
Good quality colloidal silver, 10ppm, properly made.
You can buy 10ppm CS ready made over the counter at health food stores or from Amazon, but it's pricy. I can sell you a SILVERengines *proton* CS generator (best device on the market; I know, because I designed itπ) for SATs at a discount from fiat price.
Read the website; I'm happy to answer all your questions. ππ