Original Link: http://www.coolest-gadgets.com/20120508/tattoos-monitor-blood-sugar/

Being a diabetic, this is an interesting idea.. Instead of poking your finger and squeezing blood onto a little paper strip 4 or 5 times a day, you have a color changing tattoo that monitors your glucose levels instead.

Only problem, they only last about 6 months before they need to be re-inked..