Y.E.S. Castor Oil Hair Serum is a blend of five oils that are enhanced with your choice of Lavender, Mint, or Tea Tree essential oils to prevent breakage, add moisture, sheen and promote hair growth. It can be used daily to style hair, oil a dry scalp or used weekly as a hot oil treatment. No dyes, no synthetic oils, no nut oils, no fragrances. Y.E.S. Hair Serum is great for moisturizing and styling thick, course, and curly hair. It can also be used as a hot oil treatment.