This is the best and simplest hair routine I’ve found after my postpartum hair loss—starting with Kérastase Genesis Serum on the scalp to strengthen and reduce shedding. Favorite empties. Sephora hair cate. Amazing beauty finds. Amazon hair serum. Kerastase Genesis Hair Serum | Daily Strengthening Treatment for Weak or Damaged Hair | Nourishes and Reinforces Hair | Anti-Breakage | Silicone-Free | For Weakened Hair | Serum Fortifiant. LTKBeauty LTKSeasonal LTKSaleAlert