3. Beef Liver
Beef liver is one of the most nutrient dense sources of Vitamin D3. It is an excellent source of Vitamin D3, one of the most essential vitamins for human health. Vitamin D3 is essential for the body to absorb calcium, which is essential for strong bones and teeth. Vitamin D3 also helps to regulate immunity and protect against disease and infection. Beef liver is a rich source of animal-based Vitamin D3, meaning it is actually absorbed and used by the body more efficiently than plant-based sources of Vitamin D3. Eating just a few ounces of beef liver per week can help to keep your Vitamin D3 levels in the healthy range.