Why dont we die when we starve??

Starving for 5 hours??
Your stomach is craving for your attention and yet you ignore it as you need to wake up to make your breakfast.
See, this is a classic example of  laziness in human beings.When this happens, how does your body feed your stomach??

Fats, a boon that prevents us from dying.To keep human brain charged with energy, we need to supply our stomach with suffcient food,which are broken into simple molecules and energy is supplied.But,when its fails to happen our body will be start using the skeletal muscles which can be catastrophic.
Scientists have thought that the fats in our body are converted into energy only by the presence of insulin.But, a new study done by Yale university confirms that Leptin is responsible for the transition.
Leptin is component of fat cells which is in a key position in biological process.

But,how does it happen????

When we start starving our body starts to function, such that the plasma leptin levels fail, which makes the fats to be broken down in simple molecules and then energy is produced.

While the presence of insulin is still required but, the drop in leptin levels makes it even more possible.

 How is this useful??

Researchers confirm that when our body starts starving leptin plays a crucial role in supplying the sufficint energy,nutrients and other supplements for its normal function.

Evolution of human beings is considered to be a key factor as it seems to be developed in the times where survival was crucial part of human history.