According to the protein content and the human body’s absorption rate, the order from high to low is: beef, mutton, chicken, pork.

Generally, the nutritional value of meat food depends on the protein content and the absorption and utilization rate of this protein after human consumption.

Beef has the highest protein content, but mutton protein is the easiest to absorb, but beef protein is still the most utilized by humans. Chicken ranks third, while pork has the least protein and the most fat, so it ranks last.