5. Liver
Liver is a nutrient-dense food that is rich in vitamins and minerals. It also contains an abundance of fat-soluble vitamins essential for optimal health, including Vitamins A, D, and K2.
Liver is an excellent source of iron, which is vital for red blood cells, immune function, and brain function. The high levels of vitamin A and B12 in beef liver and chicken liver are suitable for the arteries.