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<em style="b">Use: </em>Helps the body use nutrients; good for the nervous system; helps form red blood cells<br>
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<em style="b">Sources: </em>Beans, egg yolks, fish, kidney, liver, nuts, peas, tomatoes, yeast<br>
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<em style="b">Deficiency: </em>Uncommon but may result in hair loss, dry skin, cracking along the mouth, dry eyes, loss of appetite, fatigue, insomnia, depression<br>
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<em style="b">Excess: </em>Baldness, vision problems. Do not give supplements to children without talking to your pediatrician.

Biotin

( 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.