What it is
Hinokitiol is a monoterpenoid of the tropolone class, originally identified in the wood of certain cypress trees. In cosmetic formulas it is used at low levels for its antimicrobial activity, helping to keep products fresh, and is also included as a conditioning ingredient. It appears in fragrance-free skincare and sunscreen products, including formulas intended for sensitive or baby skin.
Safety & warnings
Hinokitiol is used at low concentrations and is generally well tolerated in finished cosmetics. It is not classified among the standard fragrance allergens, and it is not an oil so comedogenicity is not relevant.
Origin & sourcing
A naturally occurring compound first isolated from the wood of Taiwanese hinoki cypress and related trees; it can also be produced synthetically.
History
Hinokitiol was first isolated and characterized by Japanese researchers in the 1930s from the essential oil of Taiwanese hinoki, and it has a long history of study in Japan.
Questions everyone asks
What is hinokitiol used for in cosmetics?
It is used at low levels for its antimicrobial, product-protecting properties and as a skin-conditioning ingredient.
Where does hinokitiol come from?
It was first isolated from the wood of Taiwanese hinoki cypress and related trees, and can also be made synthetically.