Carbohydrates are macronutrients that serve as fuel for the body. And they are not essential. We could live without them, but we would feel differently.
Carbohydrates and fats, unlike proteins, can be stored by the body. What we need is this energy inside the cell and the body stores it in the form of glycogen in the muscles and liver. There is a maximum supply that the body can store, everything beyond that goes into fat tissue and excess fat in the body. The more we exercise and train, the more we have the ability to store more glycogen in the muscle and this serves us as reserve energy exclusively for physical activity.
So, that glycogen in the muscles will not be used up while we sit on the couch or skip meals. No, it is something that the body saves for some physical activity only!
What the body constantly uses is glycogen in the liver, which serves to supply the brain. The brain consumes only glucose, about six grams per hour, and that is why the liver continuously releases this glycogen in small quantities so that it enters the blood and the brain has something to feed on. The stock in the liver depends on the height and weight of the person, gender and various other factors, but from 80 to 120 grams is roughly the possibility of storing glycogen in the liver and that is enough for one day, if we do nothing and only the brain is supplied. This means that everyone should consume about 100 grams of carbohydrates every day.