We often, rather jokingly, say that there is always room for dessert! Turns out, it’s not just greed…it’s science! There is a reason why even after a heavy meal, your body somehow makes room for something sweet. Curious to know why? Read on to find out.
Why Is There Always A Place For Dessert?
Digital creator Pranav Joshi (@floydiancookery) shared the fascinating science behind why you always seem to have room for dessert, even after a hearty meal. “You might think it’s just your sweet tooth, but it’s actually a 15-million-year-old story of evolution,” he explained in the video.
He shared, “Our ancient ancestors went through a period of massive global cooling where food became extremely scarce. Those who survived developed a genetic mutation making them hypersensitive to sugar.”
He goes on to explain that, historically, much of the sugar humans consumed was stored as body fat to help survive periods of famine. Over time, the brain developed a simple rule—consume as much sugar as possible when it’s available, because the next opportunity might be uncertain.
That survival instinct hasn’t disappeared; in fact, our bodies have built systems around it. One of them is a concept known as sensory-specific satiety.
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Here’s All You Need To Know About This
Pranav explains this with a simple example. When you’re eating something like dal chawal, the neurons in your brain that respond to savoury flavours fire actively at first. But as you keep eating, their response gradually slows down, signalling that you’re full. Meanwhile, the neurons tuned to sweet flavours haven’t even been activated yet.
So, the moment your favourite dessert shows up, your appetite seems to return! And it’s not just in your head. Once the dessert reaches your intestines, the vagus nerve picks up on it and signals the stomach to release chemicals like nitric oxide. This helps the stomach walls relax and expand slightly, making room for that extra bite of something sweet.
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Basically, it’s all because of evolution that you can’t resist a good dessert!
Cover Image Courtesy: Pexels
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Why does one feel full but still want dessert?
Because of a phenomenon called Sensory-specific satiety. Your brain gets “used to” savoury flavours, but sweet flavours still feel new and exciting.