PROBLEM TO BE SOLVED: To provide a keratin softener, a keratolytic agent, an external preparation for skin, etc. to prevent and improve hyperkeratosis due to aging, etc. without burden to the skin.SOLUTION: A keratin softener, a keratolytic agent, a protein solvent, or an external preparation for skin comprises at least one selected from a white flower bean extract, a purple flower bean extract, a red bean extract, a chickpea extract, a green bean extract, and a sword bean extract.EFFECT: According to the present invention, advantageous effects of excellent keratin softness, keratin removal, and protein lysis can be attained, and keratin thickening due to delayed turnover caused by aging etc. can be therefore prevented or improved.SELECTED DRAWING: Figure 1
