Strengthening scalp and hair serum for stronger fiber from the roots. This energizing leave-in treatment is key to reinforcing and promoting a healthy scalp. Applied with a gentle scalp massage, it’s ideal to achieve strong, long healthy hair. A soothing, calming hair serum has a light texture like drops of water, yet it is highly concentrated with nutrients and active ingredients. Easily absorbed and infinitely beneficial, a serum is skin care for a sensitive, itchy scalp.