I'm just adding my experience to this thread in case it helps someone-
I have drunk a quart per day of my own homemade CS (Made with distilled water, no salt, SOTA Inst. Silver Pulser) several times over the last few years with no adverse effects whatsoever; This is approx 5 ppm- not as strong as Trapper's yellow CS..
And I wouldn't hesitate to do it at the drop of a hat if I thought it advisable to do every day, for weeks if necessary..
Might possibly want a little daily Acidophilus in addition, but so what..