Promilin Fenugreek Extract 60 TabletsDietary Supplement Helps Maintain Healthy Blood Sugar Levels When Used as Part of Your Diet Source Naturals Promilin Fenugreek Extract combines two potent extracts; one, a patent pending extract called Promilin, is standardized to contain 20% 4 hydroxyisoleucine; the other is rich in galactomannan fibers. Research suggests that both 4 hydroxyisoleucine and galactomannan fibers help support healthy blood sugar and insulin levels when used as part of