What Happens

In My Body During Fasting?

Have you ever wondered while intermittent fasting, 'Is my body doing well now?', 'What changes will occur during fasting?'

The time we maintain fasting is not just a passive time when our stomach is empty.

Rather, it's a very active and dynamic time when our body checks itself, uses energy efficiently, and starts cell-level reorganization.

Today, I'll explain the amazing things that happen in our body in order according to the flow of fasting time, in an easy-to-understand way.

Changes in Our Body by Time

▶ Fasting Start ~ 4 Hours: Time to Focus on 'Digestion' 🍔

This is right after finishing the last meal. At this time, our body focuses on digesting the food just consumed and absorbing nutrients.

Blood sugar and insulin levels are elevated, and the 'storage mode' of storing energy is active.

▶ Fasting 4 Hours ~ 12 Hours: Transition to 'Rest' Mode! 🌙

As the digestion process mostly finishes, blood sugar and insulin levels gradually begin to stabilize.

From this point, the digestive system can enter a comfortable rest, and our body prepares to gradually switch from 'storage mode' to 'maintenance mode.' It can be said that this is the starting line for the true effects of fasting.

▶ Fasting 12 Hours ~ 18 Hours: 'Fat Burning' Switch ON! 🔥

This is the time dieters look forward to the most, when our body finally starts using stored fat as energy.

As carbohydrate energy (glycogen) stored in the liver begins to deplete, the body's main fuel changes from carbohydrates to fat.

The reason why 16:8 fasting is loved by so many people is because it most efficiently utilizes this 'fat burning' section.

▶ Fasting 18 Hours ~ 24 Hours: Start of 'Cellular Cleansing (Autophagy)'! ✨

This is the time when 'autophagy,' also called the flower of fasting, becomes active.

Our cells find old and damaged proteins or unnecessary waste, clean them up, and start reusing useful things as energy sources. It's a very admirable thing.

It's the activation of our body's self-cleaning system, making cells younger and healthier.

▶ Fasting 24 Hours ~ 48 Hours: Time for 'Brain Function' to be Activated U0001f9e0

When fasting gets longer, our body creates fat into a special energy source called 'ketones' for use.

In particular, ketones increase the energy efficiency of the brain, so many people experience clearer minds and improved concentration in this section.

▶ Fasting 48 Hours ~ 72 Hours: 'Cell Reset' (🚨Caution: Expert Area)

During this period, growth hormone increases significantly, and deep changes close to the body's 'reset' occur, such as old immune cells being replaced with new cells.

However, fasting for more than 24 hours can be dangerous depending on individual health conditions, so it must be done only under the guidance of a doctor or expert.

How is it? Our bodies are doing so much during empty time, right?

You don't necessarily have to fast for a very long time. With just 16 hours of fasting, our body starts to do amazing things like burning fat and maintaining cells.

Believe in the amazing potential of your body and start a healthy fasting journey with SimFast.