When light hits the skin, electrons from the surrounding area immediately bond to the silver ions, turning them back into silver atoms. The chemical conversion results in darker particles, and the skin turns blue. The same chemical reaction is used to develop black-and-white prints. Bottom line? Don't drink it! You might end up like Paul Karason, also known Blue Man.
Hope this little tidbit didn't freak you out. I'll stick with silver bullion, thank you very much.