Do bananas have carbs?

Bananas contain about 23 to 30 grams of carbohydrates, including some fiber. A small banana has approximately 23.1 grams, a medium-sized banana contains approximately 27 grams and a large banana contains approximately 31.1 grams. Bananas also contain vitamins A and B6, thiamine, riboflavin, niacin, folic acid and potassium.

Once carbohydrates are consumed, they break down into different sugars that are absorbed and used as an energy source. The sugars that are not immediately used are stored in the form of glycogen. When the glycogen stores get full, the sugars turn to fat. Glycogen is the major source of energy used for exercise and other athletic activities.