What are carbohydrates?

Also known as sugar molecules, carbohydrates are one of the three most important nutrients found in foods and drinks. Carbohydrates are broken down into glucose by our body, which is the main source of energy for the body's cells, tissues, and organs. Glucose can be used right away or stored for later use in the liver and muscles. 

1. https://medlineplus.gov/carbohydrates.html