Hello,
I have been taking about 1to 1 1/2 ounces of crystal clear per day of 12 to 15 
PPM CS for about 3 years with no problems. But about 3 weeks ago my wife (the 
non believer in CS) noticed the moons on my fingers were turning blue. I had 
not noticed this before she said something. I was under the impression 
ingesting this amount and strength would not turn your moons blue. Could the 
blue moons come from something other than CS? I stopped taking my CS that day 
and started taking selenium, and oral chelation. 3 weeks laterthe moons appear 
to be darker. I would appreciate any input. Thank you, John.