Nioxin - Night Density Rescue 70mlNight Density Rescue is an overnight leave in treatment, clinically proven to boost hair density in 2 months**. This hair density serum is formulated with a powerful blend of antioxidants known to neutralize free radicals on the scalp surface. This antioxidant hair serum leaves the scalp feeling refreshed and is suitable for all hair types. 90% of consumers noticed their hair looking healthy* after using Nioxin Night Density Rescue. *Based on clinical