Andiroba is a popular medicinal tree in Brazil.  The oil has traditionally been used topically as an anti-inflammatory (for swelling), and to treat arthritis, rashes, muscle and joint aches and injuries, wounds, boils, and herpes ulcers. The oil contains a range of natural antioxidants and is quite resistant to oxidation. It has also been found to have a mild insect repelling capacity when applied neat to the skin.  This property can be traced to the oils terpene content, a key component being the meliancins. One additional benefit of this oil is it's naturally high percentage of free oleic acid. This makes it a good skin penetration enhancer.