A co-product is a secondary product that is produced alongside a primary product during a manufacturing or processing operation. Both products have significant economic value and can be sold or used in different applications. For example, in the production of biodiesel from vegetable oils, glycerin is generated as a co-product, which can be used in cosmetics or pharmaceuticals. Co-products are important in various industries as they help maximize resource efficiency and reduce waste. By utilizing co-products, companies can improve their profitability and sustainability. In the food industry, for instance, wheat bran is a co-product of milling wheat and can be used in animal feed or as a dietary supplement.