PROBLEM TO BE SOLVED: To provide a hair growth agent having alkaline phosphatase activating ability, namely hair papilla cell activating ability, excellent hair growth/hair restoration effects, and a high level of safety.SOLUTION: A hair growth agent comprises cyclic phosphatidic acid represented by the formula (1) as an active ingredient. In the formula (1), R is a 10-22C acyl group, and M is hydrogen, alkali metal, 1/2 alkaline earth metal, substituted or unsubstituted ammonium, or a combination of them.COPYRIGHT: (C)2015,JPO&INPIT【課題】アルカリフォスファターゼ活性化能、すなわち毛乳頭細胞活性化能を持ち、育毛・発毛効果に優れ、且つ安全性の高い育毛剤の提供。【解決手段】式(1)[式(1)中、Rは、炭素数10~22のアシル基を表し、Mは、水素、アルカリ金属、1/2アルカリ土類金属、置換若しくは無置換のアンモニウム、又はこれらの組み合わせを表す。]で表される環状ホスファチジン酸を有効成分として含有する育毛剤。【選択図】なし
