KTH Researchers Transform Millions of Tons of Wheat Waste into High-Protein Plant-Based Food Gels

KTH researchers develop a new method to transform wheat bran into protein-rich, high-fiber food gels, offering a sustainable alternative for plant-based meats.

By: AXL Media

Published: Mar 19, 2026, 4:37 AM EDT

Source: Information for this report was sourced from KTH, Royal Institute of Technology

Upcycling Agricultural Side Streams for Human Nutrition

Every year, millions of tons of wheat bran are discarded or relegated to livestock feed during the flour milling process, despite being packed with valuable dietary fiber. Professor Francisco Vilaplana and his team at KTH have identified a way to reclaim this agricultural byproduct, transforming its traditionally rough and fibrous texture into soft, jelly-like hydrogels. These materials are essential for providing structure and thickness to a wide variety of processed foods. By focusing on the "waste" portion of the grain, the researchers are addressing both global food waste and the growing demand for sustainable, plant-based nutritional additives that do not sacrifice mouth-feel or quality.

The Chemistry of the Arabinoxylan Network

The secret to the new gel lies in a natural fiber found in wheat bran called arabinoxylan (AX). Researchers extracted this fiber and combined it with wheat gluten proteins, marking the first time such a combination has been successfully engineered into a stable hydrogel without animal-based proteins. To stabilize the mixture, the team employed an enzyme called laccase, which acts as a molecular bridge, linking the fiber molecules together. This process utilizes the natural antioxidants already present in the bran, such as ferulic acid, to create a robust and consistent mesh. The result is a functional food ingredient that delivers high doses of both protein and fiber in a single, easy-to-digest format.

Overcoming the Fragility of Plant Proteins

One of the primary challenges in plant-based food science is the unpredictable behavior of plant proteins when they attempt to form gels independently. When used alone, these proteins often create textures that are brittle, uneven, or highly sensitive to changes in salt levels, pH, and temperature. The KTH study found that by trapping the protein within the arabinoxylan fiber network, these structural weaknesses are eliminated. The fiber network acts as a protective scaffold, allowing the protein to contribute to the nutritional profile of the food without compromising the physical stability of the final product. This makes the gel a reliable ingredient for complex food manufacturing.