Photo by Tim Boyle/Getty Images
February 5, 2009
Use: Helps the metabolism, healthy nerve cells and red blood cells; needed to make genetic material in cells; prevents one type of anemia
Sources: Blue cheese, clams, cod, eggs, flounder, fortified cereals, herring, liver, milk, poultry, sardines
Deficiency: Psychiatric symptoms; movement, muscle and vision problems. Vegetarians are at risk of deficiencies.
Excess: Drug interactions