When my hair starts shedding more than usual, this Kérastase Genesis serum is one of the first things I reach for. It’s popular for helping reduce hair breakage and strengthening weak roots, especially during stress or seasonal hair loss. I apply it to my scalp at night and focus on consistency instead of quick fixes. This one shows up a lot in hair growth and breakage searches for a reason. Tap to see the exact serum I use. As an Amazon Associate I earn from qualifying purchases.