Abstract: A method of measuring the effect of an active agent or a stressor on the baseline metabolic indicators of one or more hair follicles, the method including (a) obtaining one or more hair follicles; (b) placing the one or more hair follicles in a vessel, wherein the one or more hair follicles are positioned under one or more sensors; (c) using the one or more sensors to measure the one or more hair follicles' baseline metabolic indicators for both glycolysis and oxidative phosphorylation; (d) exposing the one or more hair follicles to an active agent or a stressor; and (e) using the one or more sensors to measure the one or more hair follicles' respondent metabolic indicators for both glycolysis and oxidative phosphorylation.

Abstract: Personal care composition, comprising a first ingredient selected from the group consisting of ?-phenyl butyl nitrone (PBN), PBN doxylcyclohexane radicals, 5,5-dimethyl pyrroline N-oxide (DMPO), ?-(4-pyridyl 1-oxide)-N-tert-butylnitrone (POBN), 2,2,6,6-tetramethylpiperidine 1-oxide, 4-hydroxytetramethylpiperidine 1-oxide, and the salts of N-(1-oxido-2,2,6,6-tetramethyl-4-piperidyl)-N,N-dimethyl-N-hydroxyethylammonium, 3,5-dibromo-4-nitrosobenzenesulfonic acid, 2-methyl-2-nitrosopropane, nitrosodisulfonic acid, ?-(4-pyridyl-1-oxide)-N-t-butylnitrone, 3,3,5,5-tetramethylpyrroline N-oxide, and 2,4,6-tri-t-butylnitrosobenzene, spin-trapping derivatives thereof, and mixtures thereof, a second ingredient selected from the group consisting of particulate materials, panthenol, pantothenic acid derivatives, tanning actives, and mixtures thereof; and a dermatologically acceptable carrier.