Beef is an important part of a healthy diet. About
50 separate nutrients are essential to good health. No single
food contains all of these nutrients. For this reason, dietitians and
health providers recommend consuming a wide variety of foods daily from
several different food categories. One of the nutrients you need, Vitamin
B12, can be found only in animal foods, such as beef. Beef also provides
significant amounts of other important nutrients—protein,
riboflavin, niacin, iron and zinc.
Read more about beef here.