The present invention provides a revitalizing agent that provides excellent anti-aging effects and vitalizing effects to cells, as well as safety from the prolong use of the revitalizing agent and the collagen generating promoting agent. The present invention also provides cosmetics, quasi-drugs, pharmaceutical, food, and beverage products having the revitalizing agent and the collagen generating promoting agent as active ingredient. The cell-revitalizing agent of the instant disclosure is characterized by including cellobiose esters, which is a sugar ester biosurfactant.本發明提供一種對細胞之賦活化及抗老化效果優異，且具備可充分經長期使用之安全性的賦活化劑以及膠原蛋白產生促進劑，且提供一種以該等作為有效成分之化妝品、準藥品、醫藥品、飲食品。本發明之細胞賦活化劑之特徵在於含有纖維二糖酯，前述纖維二糖酯是糖酯型生物界面活性劑的一種。
