Imagine looking at thousands of scattered puzzle pieces and trying to guess what picture they create. Without any reference point, it's nearly impossible.

A study explains how age reshapes the blood system. In both humans and mice, a few stem cells out-compete their neighbors and gradually take over blood production. The loss of diversity results in a ...

It's chock-full of botanicals that counter irritation, so you wake up with brighter and smoother — not inflamed — skin.