Macadamia oil is a hair and skin conditioning agent. Macadamia nut trees are typically grown in the tropical climates of Australia, Brazil, Indonesia, New Zealand, and South Africa. It is planted extensively in the Hawaii as a harvesting crop. It contains one of the highest sources of palmitoleic fatty acids, between 16 to 23%. Palmitoleic is said to be vital for delaying skin and premature aging. Although the oil is relatively thick and feels oily to the touch, it’s absorbed into the skin, and it doesn’t leave the skin feeling greasy. It can also be used in hair products for its moisturizing effects.