Best Beauty Buys
BEAUTY BREAKTHROUGH: GRAY'S ANATOMY
Stress-induced gray hair has always been brushed off as an old wives' tale (even President Obama's new silvery strands have been attributed to his genetic makeup, not the pressure of his high-anxiety job). But recent research from the U.K.'s Bradford University shows that oxidative stress can cause excess hydrogen-peroxide buildup in the hair bulb, which bleaches strands as they grow out of the scalp.
How to stave off silver? Biolage Rejuvathérapie Age Rejuvenating Intensive Masque ($20) and Joico Re:nu Age Defy Re:nual Serum ($40) are packed with anti-inflammatory ingredients like ginseng, hops, and lycopene, which combat oxidative stress and may prevent (and reverse) premature graying.