If you haven’t eaten for a while and you finally eat why do u feel immediacy better and like u have more energy even though the food couldn’t have been absorbed into you body yet ?

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If you haven’t eaten for a while and you finally eat why do u feel immediacy better and like u have more energy even though the food couldn’t have been absorbed into you body yet ?

In: Biology
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Simple carbs like white sugar start hitting your bloodstream pretty much as soon as you put it in your mouth. Other than that I’d suspect that the effect is psychological and that you associate the action of eating with a feeling of well being.

All food is basically made up of primary food components like carb, protein and fats. The simplest and the most effective way for our body to gain energy is by consumption of glucose. When you eat after not having eaten for a while, the trace amount of glucose gets rapidly absorbed and is used to help make you feel better. And absorption of smaller monosaccharides like glucose can take place in small amounts in the oesophagus as well so the food doesn’t even need to reach the stomach. So some glucose is used to make you feel better while the remaining food is still being digested by the body.

Because hunger pains and satiety are brain functions.

https://www.medicalnewstoday.com/articles/319921

Because your brain lies to you.

As the time between meals grows, your brain starts freaking out. It doesn’t know the next time you are going to eat. You might not eat again. It begins sending hunger signals.

You need to eat.

You NEED to eat.

I’M RATIONING ENERGY BECAUSE WE MIGHT RUN OUT!

And then, ahhhh, a bite of food goes into your mouth. Your brain realizes it was being so silly holding onto all that energy and signals your body thats it’s ok to begin burning fuel at a normal rate again. The sugar receptors in your mouth let your body know that sugar will begin coursing into your bloodstream and filling up your energy stores in the next few minutes. Death averted…for a few more hours!

There is a great early episode of Radio Lab about something similar.
[https://www.wnycstudios.org/podcasts/radiolab/episodes/91709-limits](https://www.wnycstudios.org/podcasts/radiolab/episodes/91709-limits)

Simple carbs/sugars go straight to your body’s brain and quickly add energy.

When eating, your body releases something called Ghrelin, , which tells your body that you have eaten food and you hunger is being fulfilled.

That feeling will last for a while (because of the Ghrelin),, but soon will fade if your food doesn’t contain enough other nutrients(fat, protein, ..)