Liver

Animal liver is one of the few contenders for the title of "superfood". The liver is the largest internal organ in both humans and animals, and it serves a variety of tasks. People used to consume a lot of organ meats like liver, but now they eat a lot less. Despite this, the liver is one of the world's most nutrient-dense foods. The cost of the liver is low, and it is frequently available in stores. The livers of most animals are edible, although the most common sources are cows, chickens, ducks, sheep, and pigs.

Many vitamins, including vitamin B3, are abundant in animal liver. According to scientific data, one serving of cooked beef liver (85g) contains up to 14.7mg of vitamin B3, which is equivalent to 100% of an adult female's needs and 91 percent of an adult male's needs. You can add chicken liver, pig liver, and other livers to your diet to add variety and offer up to 80% of your daily vitamin B3 needs. Chicken liver is also a good source, with each 85g meal supplying 73 percent of the RDA for men and 83 percent of the RDA for women.

The liver is also high in protein, iron, choline, vitamin A, and other B vitamins, making it an extremely nutritious food. However, because the liver contains a lot of fat, those with high cholesterol, blood pressure, and other problems so people should not take supplements on a daily basis.