Photo by Junko Kimura/Getty Images
February 5, 2009
Use: Helps the body use nutrients; good for the nervous system; helps form red blood cells
Sources: Beans, egg yolks, fish, kidney, liver, nuts, peas, tomatoes, yeast
Deficiency: Uncommon but may result in hair loss, dry skin, cracking along the mouth, dry eyes, loss of appetite, fatigue, insomnia, depression
Excess: Baldness, vision problems. Do not give supplements to children without talking to your pediatrician.