Hail oil has many functions, but at its core, the best hair oils are made up of a simple yet concentrated blend of plant-based oils. Argan oil is one of the more common and effective ingredients because it's high in antioxidants, essential fatty acids, and vitamin E, argan oil. This helps to hydrate and soften hair while preventing it from further damage. Other seed and fruit oils like moringa oil, meadowfoam seed oil, and sea buckthorn oil are also rich in fatty acids and antioxidants, which can help keep you hair moisturized without weighing them down. Look for products featuring a blend of multiple different oils for maximum benefits.