Fats constitute the first reserve in energy metabolism and are used when the carbohydrate reserve is depleted.

Fats constitute the first reserve in energy metabolism and are used when the carbohydrate reserve is depleted. However, in skeletal muscle in the presence of glucose and fatty acids, the latter are used to a large extent. Proteins are used only as a last resort when the body is starving. Explain these facts

Proteins perform very important functions and ensure the vital activity of the body, therefore they are very necessary for the body. Therefore, the use of proteins occurs only with a critical amount of fatty acids.