Beef
Beef along with other red meats is a great source of vitamin B12. A three ounce serving of cooked beef provides almost 2.3 mcg of vitamin B12 which is around 95% of the daily value for vitamin B12 and 221 kcals. In general, eating beef provides an ample amount of vitamin B12 but choosing the part of the animal to eat depends on how much vitamin B12 you are consuming through the meat. A study report that one serving of beef liver can give 71 mcg of vitamin B12 which is around 30 times the daily value coming from the three ounce serving of sirloin that provides only 1.4 mcg. In addition, beef is also rich in iron which can be very helpful to promote the production of red blood cells along with vitamin B12.