Tamanu oil also has anti-inflammatory activity. This activity is due partly to the 4-phenyl coumarin calophyllolide [Bhalla, T.N. et al. Calophyllolide: a new nonsteroidal anti-inflammatory agent. Indian J. Med. Res. November, 1980; 72: 762-5] and a group of xanthones in the oil. All the xanthones in tamanu oil show anti-inflammatory activity, which makes it effective for rashes, sores, swellings and abrasions.Tamanu oil has gained the world's attention due to a combination of effective use in traditional settings and scientific research supporting its traditional uses. Natural Styles produces and sells only pure, unadulterated Tamanu Oil.100% Pure Tamanu Oil by Natural Styles - 1oz.