From animal sources it comes from all meats, chicken, fish, beef, pork, etc.; and dairy products such as
milk,
yogurt, cheeses, pudding, and ice cream. From the plant world there are complete proteins such as soy products: tofu, soy milk, soy yogurt, soy pudding, and soy ice cream. Incomplete proteins you need to combine foods such as beans and rice, pasta with vegetables, peanut butter and bread, nuts in salad, and beans with pasta.