Tamanu Oil Good Emollient Hydration Anti-Ageing Tamanu Oil description From a tree native to Polynesia, all of the miraculous claims attributed to it are hinged on anecdotal, not scientific, evidence. There’s no harm in using this oil in skin care like most oils, it is composed of phospholipids and glycolipids, and these are natural constituents of healthy-looking skin and are good hydrating agents.