The functions of Kaempferia parciflora extract SIRTMAX® and Kaempferia parciflora-derived polymethoxyflavonoid PURESIRTMAX® through SIRT1 activation 【2021】 Haruno HONDA, Jinwei YANG Tokiwa Phytochemical Co. Ltd. Journal of Japanese Society for Medical Use of Functional FoodsVol.15 No.2 (2021)