Abstract: Method for regulating the condition of mammalian skin comprising the steps of applying a first personal care composition to an area of skin where regulation is desired, wherein the first personal care composition comprises at least one skin care active selected from the group consisting of niacinamide, salicylic acid, peptides, N-acetyl glucosamine, panthenol, butylated hydroxytoluene, N-acyl amino acid compounds, hexamidine, green tea, ascorbyl glucoside, hexanediol, pentanediol, a skin lightening agent, a heat shock protein potentiator, and mixtures thereof, and delivering energy to the area of skin by contacting the skin with an energy delivery device for a treatment period of at least 2½ minutes, wherein the energy delivery device comprises a skin-contacting surface that is controllably heatable to a temperature of from 37° C. to 50° C.

Abstract: Method for providing a benefit to mammalian keratinous tissue, comprising applying a composition comprising one or more hair growth regulating compounds to the keratinous tissue and delivering energy to the keratinous tissue by means of an energy delivery device.

Abstract: A method of assessing damage of a fibrous substrate comprises the steps of: (a) providing said fibrous substrate having a length, a root end, and a tip end; (b) providing a means for assessing substrate moisture content; (c) using said means for assessing substrate moisture content to obtain at least a first measured moisture content value for said fibrous substrate at a first position along the length of said fibrous substrate and a second measured moisture content value for said fibrous substrate at a second position along the length of said fibrous substrate; (d) comparing said measured moisture content values with each other to obtain a measured moisture content differential; and (e) correlating said measured moisture content differential to a substrate damage value for said fibrous substrate.