Tamanu Oil

A thick, dark-green oil pressed from the nut kernels of Calophyllum inophyllum — a tropical tree with deep roots in Pacific Island and Southeast Asian traditional use.

Last reviewed: February 11, 2026

Overview

Tamanu oil comes from the nut of Calophyllum inophyllum, a large evergreen tree that grows along coastlines and lowland forests across Southeast Asia, Polynesia, Melanesia, and parts of East Africa and India. The tree goes by many local names — tamanu in Tahiti, dilo in Fiji, kamani in Hawaii, foraha in Madagascar — and wherever it grows, the oil extracted from its nuts has been used. The oil is distinctive: dark green, thick, and strong-smelling, with a nutty, resinous character that sets it apart from lighter carrier oils. It is not a subtle product. In its unrefined form, it looks and smells like something that came from a tropical forest, because it did.

This page provides educational context on tamanu oil's identity, traditional background, and safety considerations.

What it is

Tamanu oil refers to the fixed oil cold-pressed or expeller-pressed from the dried nut kernels of Calophyllum inophyllum. It may appear as:

an unrefined, dark green to greenish-brown oil with a strong nutty aroma, sold in small bottles for topical use
a refined or filtered version with lighter color and reduced scent, used as an ingredient in cosmetic formulations
a component in balms, salves, serums, and creams marketed in natural skincare lines
an ingredient referenced in traditional Polynesian and Southeast Asian topical preparations

The oil is rich in fatty acids (primarily oleic and linoleic acid), calophyllolide (a coumarin compound distinctive to this species), and various resinous compounds. These constituents are frequently cited in phytochemical discussions of tamanu oil and give it its characteristic color and viscosity.

Traditional use (educational)

Tamanu oil has a long traditional history concentrated in tropical and Pacific Island cultures:

in Polynesian traditional practice, tamanu oil has been referenced as a topical preparation applied to the skin in various contexts, with oral tradition tracing its use back generations
Fijian and Vanuatu communities have historically valued the dilo tree and its nut oil, incorporating it into cultural practices and everyday use
in parts of Southeast Asia, Calophyllum inophyllum oil has been referenced in traditional medicine systems for topical application
the tree itself holds cultural and spiritual significance in several Pacific Island societies beyond its practical uses — it is planted near sacred sites and used in traditional ceremonies
European colonial naturalists documented the oil's local uses in the 18th and 19th centuries, contributing to its eventual introduction into Western natural product markets

These references describe cultural and historical use, not clinically validated outcomes.

What research says

Tamanu oil has attracted moderate research interest, particularly in phytochemistry. Calophyllolide and related coumarins have been studied in laboratory settings, and the oil's fatty acid profile is well characterized. Some in vitro studies have examined tamanu oil's biological properties, and a small number of human studies — mostly small and uncontrolled — have looked at topical applications. The evidence base is preliminary. The oil's distinctive chemical profile, particularly the calophyllolide content, distinguishes it from more common carrier oils, but the jump from interesting phytochemistry to proven clinical outcomes has not been made in robust trials. Interest persists, and the oil appears regularly in natural product research literature, but the formal evidence remains thin relative to the traditional reputation.

Safety & interactions

Common safety considerations include:

tamanu oil is for external use only and is generally well-tolerated when applied topically in small amounts
the oil is derived from a tree nut, and individuals with tree nut allergies should exercise caution — cross-reactivity patterns with Calophyllum inophyllum are not well-documented, but the precaution is commonly cited
unrefined tamanu oil has a strong scent and thick texture that some individuals find irritating, particularly on sensitive facial skin
patch testing on a small area of skin before broader application is a standard recommendation given the oil's potency and resinous character
the oil's dark color can stain fabrics and light-colored surfaces

Who should be cautious

Caution is commonly advised for:

individuals with tree nut allergies — while Calophyllum inophyllum is not closely related to common culinary tree nuts, the nut-derived origin warrants caution until individual tolerance is established
people with sensitive or reactive skin, who may find unrefined tamanu oil too heavy or irritating for direct application
anyone applying the oil to the face, where its occlusive and thick nature may not suit all skin types
pregnant or breastfeeding individuals — traditional use is long-standing, but formal safety data for these populations is limited
those purchasing from unfamiliar sources, as adulteration with cheaper oils has been reported in the market

Quality & sourcing considerations

Quality factors often discussed include:

genuine tamanu oil should be dark green to greenish-brown, viscous, and strongly aromatic — a pale, thin, or odorless oil claiming to be tamanu is likely diluted or adulterated
cold-pressed or expeller-pressed extraction preserves more of the oil's characteristic compounds than solvent extraction
the nut kernels must be properly dried and cured before pressing — traditional methods involve sun-drying the nuts for weeks, and this curing step affects oil quality
origin matters — oils sourced from established Pacific Island or Southeast Asian producers with transparent supply chains are generally considered more reliable
shelf life is moderate; the oil should be stored in dark glass away from heat and used within the timeframe specified by the producer

FAQs

Is tamanu oil the same as other carrier oils like jojoba or coconut? No. Tamanu oil is thicker, darker, and more strongly scented than most common carrier oils. Its chemical profile — particularly the calophyllolide content — is distinct. It is typically used in smaller amounts or blended with lighter oils rather than used as a primary carrier.
Can I use tamanu oil on my face? Some people do, but the oil is heavy and occlusive. Individuals with oily or acne-prone skin may find it too rich. Patch testing and starting with a small amount mixed into a lighter product is a common approach.
Is this page recommending tamanu oil? No — this is educational information only.