Hair oils and hair serums work as hydrating treatments for dry and dehydrated hair. These hair concerns can arise from external factors and need special hair treatments. These hydrating hair treatments help infuse the fiber with moisture and hydration to revive dry and dehydrated hair. Hair serum can be a targeted scalp and hair treatment or can be used as a styling product that makes your hair smooth and adds shine. Hair oil is intended to nourish and improve your hair's health by delivering a high consistency of vitamins, minerals and fatty acids, also making hair shiny. The best hair oils and hair serums for dehydrated hair help reverse the effects of drying out of the hair. Our collection of serums for the scalp and hair as well as daily, overnight and limited-edition hair oils are formulated to deliver results for all hair types seeking hydration. Explore our hydrating hair care sets and save 10% or take our hair quiz and find the perfect hair serums and hair oils for hydrating your dehydrated dry hair.