Seeing more strands than usual in your brush and on the shower floor is unsettling. When hair is weakened, it gives way two ways: it snaps partway down from fragility, and it loosens at the root, so more of it falls before its time, and everyday stress, heat, and wear only leave it weaker and quicker to shed. Strengthening hair like this is an ongoing, every-wash job, so running out mid-routine lets the fragility creep back.

This fortifying shampoo strengthens weakened hair on two fronts. A reinforcing peptide and edelweiss rebuild the fibre, so strands are less likely to snap, and the formula helps re-anchor hair at the root so more of it stays put, while ginger root invigorates and clarifies the scalp without drying your ends. The duo keeps you stocked: a large 500ml bottle plus a matching 500ml eco-refill made with recycled materials, so you get the same results with less packaging waste and better value than buying two separate bottles.

Hair feels softer, stronger, and more resilient from the first wash, and with continued use, Kérastase reduces hair fall due to breakage by up to 80%. With the refill on hand, you can keep the strengthening routine going without a gap, so weakened hair holds on at the root and along every strand, and you see fewer strands falling over time.