An object of the invention is to provide a safe sense-improving agent which, when routinely ingested or applied to the skin, has an effect of alleviating the dulling of sensation at the extremities. Another object of the invention is to provide a sense-improving food, beverage, or cosmetic product which, when taken orally or applied to the skin, has an effect of alleviating the dulling of sensation at the extremities.A sense-improving agent is provided that uses milk-derived protein and/or a degradation product of milk-derived protein as an active ingredient. When ingested orally or applied directly to the skin, this milk-derived protein and/or degradation product of milk-derived protein can alleviate dulling of the senses, particularly at the extremities. The sense-improving agent can also be provided in the form of a food, beverage, or cosmetic product.本發明之課題在於提供安全且藉由日常攝取或塗佈於皮膚，而顯示改善末梢感覺鈍化之效果的感覺改善劑。又，本發明之課題為提供藉由經口攝取或塗佈於皮膚而顯示改善末梢感覺鈍化之效果之感覺改善用飲食品或飼料、化妝品。本發明提供將乳來源蛋白質及/或乳來源蛋白質分解物作為有效成分使用之感覺改善劑。藉由經口攝取或於皮膚直接塗佈乳來源蛋白質及/或乳來源蛋白質分解物，能改善感覺鈍化，尤其末梢感覺的鈍化，可製成感覺改善用飲食品或飼料、化妝品。
