Skin Care » pH balance

In high-school chemistry class, you most likely learned about pH and dipped little, color-changing strips into liquids to see where they fell on a scale of 1 to 14. In case you need a refresher: "Anything below 7 is acidic, above 7 is alkaline, and 7 is neutral, like water," explains cosmetic chemist Ginger King.  Few skincare topics have become as mired in confusion...