Tamanu (Calophyllum inophyllum)
What Is Tamanu?
Tamanu is catalogued in the Materia Medica under the binomial Calophyllum inophyllum, a plant of the Calophyllaceae family, native to the coasts of tropical Asia and the Pacific. The material in circulation is nut (cold-pressed oil) — the fruiting body of the plant. Most people search for it simply as Tamanu; suppliers, pharmacopoeias and interaction databases list it as Calophyllum inophyllum, and matching the two is the first step in identifying what is actually in a product. In the hand it reads as rich, nutty, green-resinous, slightly medicinal — a practical marker of freshness and correct identification.
The written history of Tamanu begins with household and practitioner use — recipes, harvesting notes and cautions passed between regions — and only much later with laboratory description of what the nut (cold-pressed oil) contains. Beyond its practical use it carries cultural associations — polynesian sacred tree — oil of the gods, healing and protection.
Today most searches for Tamanu come from people reading about acne, wound healing, burns and scarring, or checking how it sits alongside a medication they already take. The use most often documented in the literature is calophyllolide is anti-inflammatory and accelerates wound closure, followed by traditional and clinical use for scars, stretch marks and burns.
How Does Tamanu Work?
Tamanu works as a mixture rather than a single isolated compound, and its profile is usually described by the class of constituents present in nut (cold-pressed oil) rather than by one marker molecule.
Before its chemistry was known, Tamanu was judged by what it did in the cup: how strongly it brewed, how it tasted, and how little or much was needed. Those notes are why particular preparations survived and others did not.
The research base is developing: there are human trials, though sample sizes and designs vary, and this profile cites 1 source. Reported findings centre on calophyllolide demonstrated reduced inflammatory infiltrate and faster re-epithelialization in murine wound models; oil is rich in calophyllic acid and oleic/linoleic acids. Where research exists, it examines calophyllolide is anti-inflammatory and accelerates wound closure, traditional and clinical use for scars, stretch marks and burns and antibacterial against Propionibacterium acnes. These are areas of study, not established outcomes, and results differ by preparation and dose.
How the plant is prepared changes what you actually get. Its constituents move readily into fixed oil and alcohol — so a preparation made in another medium will not carry the same fraction of the plant, which is why traditional recipes specify one over another.
Tamanu is studied as a whole preparation because isolating one fraction tends to behave differently from the material it was taken out of — a recurring finding across the plant-chemistry literature.
Because these constituents are processed by the same pathways that handle many medicines, Tamanu is documented as interacting with topical retinoids. That is a question of shared metabolism rather than of potency, and it is the main reason the plant is listed in interaction references at all.
Dose, plant part and growing conditions all shift the constituent profile, so two products carrying the name Tamanu can differ substantially; this is why reference entries specify nut (cold-pressed oil) and, where they exist, standardisation markers.