Procter & Gamble researchers are trying to do for women’s follicles what they did for their stratum corneum. The new Pantene AgeDefy hair care line shampoo, conditioner, masque and thickening treatment were all created to counteract the seven signs of hair’s aging. “Understanding what really happens to hair as we age has been a big effort for us at Pantene,” said Pantene Principal Scientist Emily Overton. “We’ve come to realize that, like skin, there is much more to it than just ...