• Vitamin B12 is a vitamin that is water soluble, naturally available in some foods, added to some foods and is also available in supplement form. Vitamin B12 can also be prescribed by your doctor if you have a severe deficiency. Foods such as milk, eggs, poultry, fish and meat all have natural occurrences of B12, while B12 is often added as a supplement to cereals and breads. The recommended daily intake (RDA) for vitamin B12 is 2.4 mcg per day whether male or female.
  
  

Liver

• Beef liver contains high levels of the B12 vitamin. One slice of braised beef liver (about 4 ounces) contains 48 mcg of B12. This is equivalent to 800 percent of the recommended daily value.
  
  

Clams

• Breaded and fried clams contain 34.2 mcg of B12 or the equivalent of 570 percent of the daily recommendation. Consume 3 ounces of breaded, cooked and fried clams to reach this level.
  
  

Breakfast Cereals

• Breakfast cereals are often fortified with vitamin B12. Look for cereals that contain 100 percent of the daily recommended value. A serving of fortified cereal contains 6.0 mcg of B12 and is equal to 100 percent of the daily recommendation. Look for nutrition information on the package to determine the size of a serving.
  
  

Fish

• Rainbow trout and sockeye salmon contain high levels of the vitamin B12. Three ounces of either of these cooked fish will provide between 4.2 and 5.4 mcg of B12 a day. This amount is equal to between 50 and 90 percent of the daily recommendation.
  
  

Top Sirloin

• A 3-ounce serving of top sirloin that has been broiled provides 2.4 mcg of vitamin B12 and about 40 percent of the daily recommendation.