Amyris essential oil is produced by steam‑distilling the heartwood of Amyris balsamifera, an evergreen shrub native to Haiti and the Caribbean region. The oil is rich in sesquiterpene alcohols — particularly valerianol, α‑eudesmol, 7‑epi‑α‑eudesmol, 10‑epi‑γ‑eudesmol and elemol. Research on its composition shows that it also contains tau‑cadinol, 11‑en‑4‑α‑ol and elemol in appreciable amounts, as well as β‑caryophyllene and germacrene D. These oxygenated sesquiterpenes have mild antioxidant and anti‑inflammatory activities, so the oil is used in cosmetics as a soothing, emollient and perfume fixative.

Amyris oil’s sesquiterpene alcohols have been shown to exhibit antimicrobial activity. This antimicrobial effect, combined with the oil’s antioxidant constituents, makes it a useful addition to skin‑care formulations aimed at keeping pores clean and preventing microbial growth. Commercial suppliers describe the oil as a natural anti‑inflammatory and antiseptic that soothes irritated skin, supports wound healing and moisturises dry or dehydrated skin. In hair‑care, amyris is used primarily for its fragrance and calming properties rather than for direct hair growth; however, suppliers note that its soothing aroma may indirectly benefit the scalp by reducing stress‑related hair loss and that the oil leaves hair shiny without stripping natural oils. Because amyris oil is mild and has no documented hazards, it is generally considered safe when diluted properly, although all essential oils should be patch‑tested before use and avoided undiluted on the skin.