Maximize the benefits: To tame blood sugar, study subjects took 1 g capsules of standardized cinnamon extract daily, while those in the cholesterol study took 1 to 6 g. But keep in mind that a large amount of the actual spice can be dangerous, so stick with a water-soluble extract. Terry Graedon, PhD, coauthor with her husband, Joe, of Best Choices from the People's Pharmacy, recommends the brand Cinnulin PF.