What is the order stored fuels are utilized in starvation?

During starvation, the body utilizes stored fuels in a specific order: first, it depletes glycogen stores in the liver and muscles, which provide quick energy. Once glycogen is exhausted, the body begins to break down adipose tissue (fat) for energy through lipolysis. Finally, as starvation progresses further, the body starts to catabolize muscle protein for glucose production and energy, which can lead to significant muscle loss. This metabolic shift helps sustain vital functions but can have serious health implications over time.