Xanthosine is a nucleoside derived from xanthine and ribose. Xanthosine activates the AMPK/FoxO1/AKT/GSK3β signaling cascade. Xanthosine promotes cell proliferation and regulates blood glucose metabolism. Xanthosine increases milk production in cows and goats. Xanthosine is used in mammary stem cell and type 2 diabetes research[1][2][3][4][5][6].