Contains antioxidants. Antioxidants fight free radical damage. When your body has an overload of free radicals that it cant destroy, damage happens. This is one of the causes of faster aging in your skin. Tamanu oil is rich in antioxidants, and it is often added to anti-aging creams.
Provides sun protection. The sun causes a lot of damage to your skin. Tamanu seems to be able to absorb UV light within a fairly large spectrum. More studies are needed before this can be used as sunscreen though.
Heals wounds. Tamanu oil helps with wound closure, skin cell growth, and collagen production. All of these can help with wound healing.