I remember getting a couple of sunburns when I was younger.  As an adult, I tend to not burn but also not tan.  It’s as if my skin has chosen to turn off its sun-intake signals.  With the upcoming release of the Helios Smart Ring, I can be informed of how much or little Vitamin D my body has absorbed. Created by the Dutch health tech company, e-Senses, the smart ring wirelessly connects to an app on your phone.  It will continuously monitor your sun exposure and report in real time whether it’s time to get out of the sun or not.  e-Senses is currently working on retailing the ring for around 149 Euros in either black or white.  The Helios Smart Ring comes with its own charging station and a one-year warranty.