In a study conducted at the University of Helsinki, 136 adults adhered to one of three study diets for 12 weeks. One of them corresponded to the average Finnish diet, containing roughly 70% animal-derived protein of total protein, while most of the plant-based protein originated from cereal products. In the second study diet, half of the protein was derived from plant products and the other half from animal products, while the third one contained 30% animal protein and 70% plant-based protein of total protein.