If the Colloidal Silver that you purchase does not label the ions 10 ppm or less, it is not bio-available to cells, period!  Do NOT trust the propaganda, read the science.  My friend showed me a bottle of 500 ppm colloidal silver that she bought for $48.00.  It resembled black muddy water.
 
The CollGen2® generates 7 ppm ionic colloidal silver.  Trillions of ions in an ounce.  http://www.collgen2.com.  Read the science, not websites selling junk.  Know what you are generating with the CollGen2®, 7 ppm each and every gallon.