lol Barb-colloidal silver has actually been used for hundreds of years to treat bacteria and allergies. The blue skin pigmentation starts when the silver particles aren't small enough. They react with the sun to change the color of your skin. It's freaky. Unfortunately, it's not a regulated process, so just like all supplements, you can't necessarily be guaranteed that it's strong enough or not too strong or even the right herb.

I could think of some colors I wouldn't mind being, but blue isn't one of them, lol.