DEAR DOCTOR K: Diabetes runs in my family, and my mother says I should eat a "low glycemic index" diet. Can you explain what this is?
DEAR READER: Carbohydrates ("carbs," for short) are one of the main types of nutrients in food. Common sources of carbs include bread, pasta, cereals, fruit, milk, vegetables and beans. The carbs we eat are mostly too big for us to digest. Carbs are long strings of a certain type of molecule. Think of them as a string of pearls. When they hit the gut, digestive enzymes start to chop them up. It is the one-pearl and two-pearl strings that are the sugars that get digested and travel from the gut into the blood.