PROBLEM TO BE SOLVED: To provide lactic acid bacteria fermentation promoters and fermentation methods suitable for use in food production.SOLUTION: The present invention provides lactic acid bacteria fermentation promoters containing a compound having a purine skeleton in which a hydrogen atom is bound to a carbon atom at 2-position, and lactic acid bacteria fermentation promoting methods and production methods for fermented foods such as fermented milk, using the fermentation promoters.SELECTED DRAWING: Figure 6【課題】食品製造での利用に適した乳酸菌の発酵促進剤及び発酵方法の提供。【解決手段】２位の炭素原子に水素原子が結合したプリン骨格を有する化合物を含む、乳酸菌用の発酵促進剤、並びにそれを用いた乳酸菌用の発酵促進方法及び発酵乳等の発酵食品の製造方法。【選択図】図６
