. "Of these three vitamins, folic acid supplementation lowers homocysteine levels the most for the average person.25 , 26 It also effectively lowers homocysteine in people on kidney dialysis.27 In 1996, the FDA required that all enriched flour, rice, pasta, cornmeal, and other grain products contain 140 mcg of folic acid per 3?? ounces.28 This level of fortification has led to a measurable decrease i" . . . .