Daily nutrition is inconceivable without carbohydrates. Complex carbohydrate sources include noodles, potatoes, rice and bread.
Depending on their goals many athletes tailor their nutrition to be rich or low in carbohydrates. A substantial number of fitness athletes use carbohydrates to support training. Some of them above all in a combination with protein. This combination is found to a large extent in the so-called weight gainer products. They contain a considerable proportion of carbohydrates and proteins and are hence used above all to build muscle and mass.