UV and visible light exposure to hair leads to widespread changes in the hair lipidome.

Cell membrane lipids are sometimes referred to as internal lipids and contribute to physiomechanical properties of hair, contributing to hair integrity by acting as a "glue" between protein structures via interaction between lipids and the hydrophobic domains of globular proteins within the cuticle and cortex cells (Robbins, 2009; Marsh, Whitaker, et al., 2018b). Keywords: chemical analysis; hair treatment; Lipidomics; mass spectrometry; UV light exposure EN chemical analysis hair treatment Lipidomics mass spectrometry UV light exposure 672 684 13 11/10/22 20221201 NES 221201 Profiling the lipid classes and lipids in hair was used to understand the diversity of changes to the hair lipidome when exposed to UV and visible light. The main lipid classes that differed were vitamin A fatty acid esters, sterol esters, several ceramides, mono-, di- and triglycerides, phosphatidylethanolamines (all decreased in UV-exposed hair) and bismonoacylglycerolphosphates, acylcarnitines and acylglycines (all increased in UV-exposed hair). [Extracted from the article]