The present invention provides a novel method to promote the production of equol in human intestines, or to improve the premenstrual syndrome associated with it, or to improve skin discomfort or changes in skin condition with increasing age. The equol production accelerator of the present invention contains yeast mannan as an active ingredient. The premenstrual syndrome improving agent and skin condition improving agent of the present invention contain the equol production accelerator (yeast mannan). The food composition and beverage composition for equol production promotion, premenstrual syndrome improvement, or skin condition improvement of the present invention contain the above equol production accelerator, premenstrual syndrome improvement agent, or skin condition improvement agent, respectively.本發明提供一種用以促進人之腸內之雌馬酚之產生的新穎手段，或者用以改善與其相關之經前症候群，或改善皮膚不適或伴隨年齡增加之皮膚狀態之變化的新穎手段。本發明之雌馬酚產生促進劑含有酵母甘露聚糖作為有效成分。本發明之經前症候群改善劑及皮膚狀態改善劑含有該雌馬酚產生促進劑（酵母甘露聚糖）。本發明之雌馬酚產生促進用、經前症候群改善用或皮膚狀態改善用之食品組成物及飲料組成物分別含有上述雌馬酚產生促進劑、經前症候群改善劑或皮膚狀態改善劑。
