Others say the scalp treatment "revived" their hair.

Cold weather, lower humidity, and indoor heat can disrupt the hair growth cycle, pushing more strands into the shedding phase. Dry air, tight hats, and scalp barrier disruption can lead to brittleness ...

Forbes contributors publish independent expert analyses and insights. Meggen Harris writes about entrepreneurs in beauty and wellness. To keep your hair and scalp healthy—especially as we age—it's ...