You Can Track Your Heart, Steps, and Calories. Beauty Health Index (BHI) Says It's Time to Track Your Face.

<img src="https://sm.mashable.com/t/mashable_nl/photo/default/image2-1_zr8n.640.jpg" width="120" hspace="5" alt="" vspace="5" align="left" />A Different Approach to Beauty <p>We have turned self-tracking into a reflex. A ring counts your sleep stages. A watch logs your heart rate and steps, a patch reads your glucose, an app scores your recovery. We now have a number for almost every system in the body, and we check them the way we …