Abstract: An information processing system provides information regarding a product for skin and can include a control unit or controller. The control unit analyzes biological information regarding skin of multiple users and generates multiple skin classifications for classifying the skin of the users based on analysis. The control unit stores user identification information for identifying a user of a source of the biological information in association with one of the generated skin classifications and stores product information regarding multiple products relating to skin in association with the corresponding skin classification. The control unit receives, from a terminal of a user corresponding to the user identification information, a search request for product information using the skin classification as a search criterion.

Abstract: A hair treatment method comprising steps [A-1], [B], and [C], wherein the method is carried out in the order of [A-1]?[B]?[C], or in the order of [B]?[A-1]?[C]: step [A-1]: a step of applying a first hair treatment agent comprising an organic acid having a solubility in 100 mL of water at 20° C. of 50 g or less or a salt of the organic acid, as component (A1), to hair, and rinsing the hair; step [B]: a step of applying a second hair treatment agent comprising a carboxylic acid having an inorganic value of 250 or more and 450 or less and an organic value of 50 or more and 250 or less or a salt of the carboxylic acid, as component (B), to the hair; and step [C]: a step of applying a third hair treatment agent comprising an aromatic sulfonic acid having a molecular weight of 300 or less or a salt thereof, as component (C), to the hair.

Abstract: The present invention is directed to a composition, process, and kit for semi-permanent straightening and curling of keratin fibers. The combination of glyoxylic acid and alkyl glyceryl ethers or alkyl polyglyceryl ethers in an emulsion provide for a thermoplastic effect which allow for improved restylability of the keratin fibers.

Abstract: A hair treatment method comprising steps (i) to (iii): step (i): a step of applying a hair treatment agent containing components (A) and (B) to hair; step (ii): a step of leaving the hair to stand, after step (i); and step (iii): a step of applying a hair treatment agent containing component (C) to the hair, after step (ii), (A) a compound selected from the group consisting of a glycylglycine derivative, a polyglycerin, and an alkyl glyceryl ether; (B) a carboxylic acid having an inorganic value of 250 to 450 and an organic value of 50 to 250, or a salt of the carboxylic acid; (C) an aromatic sulfonic acid having a molecular weight of 300 or less, or a salt thereof.

Abstract: A method for treating hair, comprising the following steps: step (i): a step of applying a first composition comprising carboxylic acid having an inorganic value of 250 to 450 and an organic value of 50 to 250, or a salt of the carboxylic acid, as a component (A), to hair, step (ii): a step of leaving the hair, to which the first composition has been applied, at a temperature of 15° C. to 100° C. for 15 seconds to 60 minutes, and step (iii): a step of applying a second composition comprising aromatic sulfonic acid or a salt thereof having a molecular weight of 300 or less, as a component (B), to the hair after completion of the step (ii).

Abstract: A method of evaluating inhibitory effect on damp-dry malodor, containing the steps of: bringing microorganisms which produce damp-dry malodor-causing substances and a test substance into contact with each other in the presence of a sebaceous dirt component; detecting expression of at least one kind of gene selected from a fatty acid desaturase gene and a ? oxidation-related enzyme gene derived from the microorganisms; and thereby evaluating a damp-dry malodor inhibitory function of the test substance based on a change in expression amount of the at least one kind of gene.

Abstract: A method of evaluating inhibitory effect on damp-dry malodor, containing the steps of: bringing microorganisms which produce damp-dry malodor-causing substances and a test substance into contact with each other in the presence of a sebaceous dirt component; detecting expression of at least one kind of gene selected from a fatty acid desaturase gene and a ? oxidation-related enzyme gene derived from the microorganisms; and thereby evaluating a damp-dry malodor inhibitory function of the test substance based on a change in expression amount of the at least one kind of gene.

Abstract: A method of screening a damp-dry malodor inhibitor, containing the steps of: bringing microorganisms having a 4-methyl-3-hexenoic acid production capacity into contact with a test substance in the presence of a sebaceous dirt component, detecting the production of a damp-dry malodor-causing substance by the microorganisms, and thereby selecting a test substance having a damp-dry malodor inhibitory function; and a method of evaluating a damp-dry malodor inhibitor, containing the steps of: bringing microorganisms having a 4-methyl-3-hexenoic acid production capacity into contact with a test substance in the presence of a sebaceous dirt component, detecting the production of a damp-dry malodor-causing substance by the microorganisms, and thereby evaluating the damp-dry malodor inhibitory function of the test substance.

Abstract: A method of screening a damp-dry malodor inhibitor, containing the steps of: bringing microorganisms having a 4-methyl-3-hexenoic acid production capacity into contact with a test substance in the presence of a sebaceous dirt component, detecting the production of a damp-dry malodor-causing substance by the microorganisms, and thereby selecting a test substance having a damp-dry malodor inhibitory function; and a method of evaluating a damp-dry malodor inhibitor, containing the steps of: bringing microorganisms having a 4-methyl-3-hexenoic acid production capacity into contact with a test substance in the presence of a sebaceous dirt component, detecting the production of a damp-dry malodor-causing substance by the microorganisms, and thereby evaluating the damp-dry malodor inhibitory function of the test substance.