Right now, I\'m reeeeally hungry, feeling shaky because of my low blood sugar an

Question

Right now, I'm reeeeally hungry, feeling shaky because of my low blood sugar and all. I'm wondering though why my stupid body doesn't realise that there are plenty of nutrients around my waist so I would neither have to feel bad nor to run for a cheese sandwich. I've heard that burning fat is a slow process but from experience I can tell that this feeling only gets worse. So I'd be glad if you could answer this question in one of your upcoming shows: why do I feel so abhorrently hungry when there's enough to digest without actually involving my digestive tract?

Explanation / Answer

The signals to eat and the signals to be hungry seem to be generated from within the brain. Two of the key signals that allow the brain to access information about the state of nutrition are the hormones leptin and ghrelin. Leptin comes from fat tissue and probably its most important function is that when we become too thin and the leptin level drops in the blood below a certain threshold, then we become ravenously hungry. However, when we have accumulated too much fat, our brain tends to become effectively deaf to the signals coming from adipose tissue. Ghrelin has a rather opposite effect. It

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