- Design: All subjects will be randomized to one of two 12-week treatments in a two-treatment parallel design. Treatments: 1) low glycemic index dietary advice (e.g. to eat intact grain cereals, Pita Break Finland Rye and Little Stream Quinoa breads, parboiled rice, cracked wheat, pasta, peas, beans, lentils, and baked goods made from legume flour), with particular emphasis on a canola oil containing bread; and a 2) high cereal fiber diet emphasizing whole grains.