Final answer:
Carbohydrates supply around 50-70% of the body's energy needs during rest, with complex carbohydrates recommended for steady and prolonged energy. They are key energy sources and especially vital for brain function.
Step-by-step explanation:
During rest, carbohydrates supply approximately 50-70% of the body's energy needs. Carbohydrates are essential dietary components that play a crucial role in providing energy to our body. They are especially important as they are the primary fuel source for the brain, which uses a significant portion of the body's glucose.
Moreover, carbohydrates are synthesized by our body from non-carbohydrate sources when not enough is consumed through diet. However, it's recommended that most of the carbohydrates we consume should be complex carbohydrates, as they provide longer-lasting and more steady energy compared to simple sugars.
Proper intake of carbohydrates is important, as they are the energy yielding substances in our diet, alongside fats and proteins, with a general recommended intake ratio of 1:1:4 (proteins: fats: carbohydrates).