What is the deal with everyone using oil in their hair? Wait, people use hair serum as well? What is a hair serum? Should I use either in my hair? What is the difference? Are you using any sort of oil or serum in your hair? Are you pondering these questions? Lets dive into the difference between the two. Hair oils such as Morrocan Oil, Marula Oil and Scruples Renewal Hair Therapy Polish, to name a few, are for the purpose of hair care. These oils and those similar, conditi