Liver is known to be one of the most concentrated sources of natural vitamin A of any foods. Natural vitamin A works to aid digestion, keeps sex organs/reproductive organs healthy, and is a powerful antioxidant in the body. A 4-ounce serving of beef liver provides more than 10 times the recommended dietary allowance (RDA) of vitamin A.
Good source of vitamin B12. Liver contains 35 to 50 times (depending upon how it’s prepared) the RDA of vitamin B12.
Iron and zinc. Liver contains 100% or more than 50% of the RDA’s for iron and zinc. Iron is necessary for many functions in the body including formation of hemoglobin, brain development and function, regulation of body temperature, muscle activity
Liver is a great source of folic acid which is important for brain development and function.
Liver contains many nitrogen-containing compounds that are building blocks for DNA & RNA. In combination with the B vitamins, this makes it extremely helpful to people with Alzheimer's or other types of dementia