No-Calorie Powder May Substitute for Food's Fat George E. Inglett of the U.S. Department of Agriculture's Biopolymer Research Unit in Peoria III invented a no-calorie fat substitute called Z-Trim. It is a mix of crushed fibers made from the hulls of grains. It can replace the fat and some of the carbohydrates in foods such as chocolates, brownies, cheese, and ground beef. He spent three years trying to perfect Z-Trim to be smooth because he made it out of tough hulls of corn, oats, and rice. He first crushed the hulls with a solution of hydrogen peroxide. He washed the peroxide off in centrifuge. After this step