Source Naturals Ultra Colloidal Silver™ -- 10 ppm - 4 fl oz
10ppm seems to work best. And, the studies I've read have said the same. It's about how small the particles are.
March 5, 2014
I love this product and the company is wonderful about shipping. Each bottle was wrapped in bubble wrap and well sealed for shipping. I highly recommend this product as well as this company.
October 12, 2012
I use this for basically every ailment my body comes across. Colloidal gold and silver combined with supplements and foods to aid in circulation is basically all I use to keep healthy.
December 6, 2008
this is the best silver at the right ppm's in a glass bottle with the right coloring. Far more effective than others I've tried.
February 11, 2008
I would recommend this product due to its low PPM (parts per million) The smaller the PPM in colloidal the easier it is for your cells to use them. If the PPM are too high the colloidal will get heavy and clump together and your body can't use it.
January 27, 2008