Biotin

HTML clipboard Good sources: Cheese, egg yolks, milk, peanut butter, & liver. DRI: 20-30 mg/d Functions: Co-enzyme in glucose production and fat synthesis. Required for the proper function of pyruvate carboxylase. Deficiencies: Pale, dry skin; depression; poor appetite (not common). Toxicities: None known

Insulin: Friend or Foe?

Insulin has a number of essential functions. However, an excess of this vital hormone can be extremely detrimental.