Study of Fragrance Materials on Controlling Head Odors Formation

Abstract

We studied human head odors by sensory test and GC-MS analysis of hairs and head-space components. We thought that head odors mainly consisted of mixed odors of fatty acids (from lower to higher fatty acids), and these fatty acids were produced from triglycerides in the lipids by lipase of resident flora on the scalp. We developed the fatty acids formation model by lipase and bacteria, and found many fragrance materials controlling fatty acids formations. And we verified the effect of controlling head odors by hair shampoo and rinse use test.
Furthermore, we found that several fragrance materials form the esters with fatty acids.