Darling Ingredients, a service provider for efficient used cooking oil recycling and sanitary fat and bone pickup, completed the acquisition of Gelnex, a global producer of collagen products, for $1.2bn. "Driven by strong growth in demand for collagen products in the global health and nutrition market, we anticipate the collagen peptides market to double in the next five years. Gelnex is a well-run business and will be immediately accretive. This acquisition will allow Darling to continue to grow its presence in the health and nutrition market and increases our production capacity for grass-fed bovine collagen in South America to help meet the future demand of our collagen customers worldwide," Randall C. Stuewe, Darling Ingredients Chairman and CEO.