WALNUT CREEK, Calif. — Six months ago, Don Stahlhut of Oakland, Calif., went on a high-fiber diet per the suggestion of his nutritional coach. Stahlhut, 65, had a family history of heart failure and was taking three medications for high cholesterol.
He began scanning labels for fiber content. He switched from sugary cereal to corn bran, and sprinkled it with ground flax. And, when he woke up each day, he stirred two tablespoons of psyllium, a plant-derived form of soluble fiber found in bulk laxatives, into a glass of unsweetened juice.