You might be wondering what's the difference between hair oil and hair serum. Oil is a hair care product, while serum is a styling product. The best hair oils contains multiple nutrients and goodies that your hair needs, it works as a nourishing treatment to enhance the overall health of your hair. It boosts hydration, prevents breakage and splits ends. The best hair serum, is a heat protectant that primes your hair for heat styling, it usually contains vitamins and minerals too for extra benefits. Serum can also be used post styling to tame frizz and add shine. Hair growth oils and serums greatly benefit your hair.