Abstract: A new natural oil personal care composition and system for treating damaged hair and/or supporting healthy hair and healthy hair growth. The composition comprises a blend of natural oils including Jamaican black castor oil, and one or more of natural sweet almond oil (preferably unrefined), pure avocado oil, and hemp seed oil (preferably unrefined). The oils are preferably organic. The composition is useful for repairing damaged, depleted and/or thinning hair due to various factors, including inadequate nutrition or overproduction of sebum, which can result in hair loss. The composition is also useful for repairing dry, frizzy, oily, dull (low shine), and brittle hair that has been naturally damaged by the elements (e.g. the sun, heat, wind, and/or cold), by wearing head gear or hair accessories that create friction with the hair surface (e.g. helmets, hair elastics and hair bands), by inappropriate or overuse use of hair styling tools (e.g.