Wella SP Balance Scalp Energy Serum is an intensive strengthening serum with a patented formula which makes thinning hair stronger, it can reduce hair loss by up to 50%. Balance Scalp Energy Serum delicately balances and soothes sensitive scalps as well as strengthening thin hair to reduce hair loss. Massage gently into the scalp. Do not rinse out. Use 3 times weekly; in the case of acute hair loss use daily. For optimal results use SP Balance Scalp Shampoo to prepare scalp.