It’s 5 PM, and you realize that you’ve been the busiest person for days.
You think that you went a day and a half without eating anything to regain your energy.
Some of us can survive being hungry for that long.
We live in an era where food has become too accessible and numerous.
For most, fasting becomes a trending habit instead of a commitment.
Imagine other people can hold out fasting for more than 24 hours.
A viral simulation has caught the attention of users, revealing what happens to your body during a 36-hour fast.
In the simulation, the body was seen to convert the stored sugar and use the stored fats to activate the natural cellular maintenance processes.
It proved how the human body is adaptable in situations where you don’t eat for several hours.
Although 36-hour fasting is indeed long, experts have noted its health benefits, risks, and other implications for your health and lifestyle.
What is Fasting?
Fasting is a habit practiced by humans due to spiritual, religious, or cultural reasons.
Such a habit is the cessation of eating meals for specific hours.
The practice of fasting has been different in modern times. It’s mostly applied for health or wellness reasons.
Fasting can be practiced in different ways.
Most of it is dependent on the hours of its execution.
Some fasting methods are:
- Intermittent Fasting (8 Hours)
- Half-Day Fasting (12 Hours)
- 14-Hour Fasting
- 16-Hour Fasting
- Whole Day Fasting (24 Hours)
- Extended Fasting (36 Hours)
Periodic fasting can cause metabolic changes within the body.
This could be the reason why many people are inspired to do the 36-hour fast.
Not just to challenge themselves, but to be aware of how their body works within.
Normal Digestion During the First Few Hours
After eating your meal, your body will start breaking down the food to extract the nutrients.
This will be the normal digestion process for the first six hours.
Your digestive system remains active during the said hours.
The carbohydrates consumed are slowly converted into glucose to become the body’s energy.
You may experience some things, such as:
- Rise in your blood sugar level
- Absorption of nutrients
- Energy-sourcing from food consumption
- Insulin release
During this period, the body normally operated as if fully fed.
Stored Energy Usage During 8 to 12 Hours
After you haven’t been eating for 8 to 12 hours, the body starts to act like an energy generator.
It starts to draw from the body’s stored energy reserves.
When the food is unavailable, the liver stores glucose in the form of glycogen.
Consider glycogen as the body’s emergency battery.
It can help you achieve:
- Supplying the body’s energy
- Increased hunger urge
- Declination of insulin
However, people who don’t eat for this certain period may experience subjective hunger levels.
This is when the temptation of hunger begins.
The Burning of Fats During 12 to 18 Hours
At this point, the body starts to rely on its stored fats.
The body starts using the stored fats as its energy source.
The liver will convert the fatty acids into molecules as its new alternative fuel source.
These molecules are known as the ketones, which are made through the process called metabolic switching.
Ketone Production Intensifies During 18 to 24 Hours
The body continues to increase ketone production due to the absence of food.
Individuals who surpass this period may experience:
- Body fatigue
- Headaches
- Lesser energy
- Increased irritation
Other people have been confirmed to achieve:
- Slight increase in alertness
- Lesser hunger urge
- Clearer mind
- Enhanced concentration
However, other factors can affect their experience during this period, such as:
- Stress levels
- Physique
- Hydration levels
- Quality rest
- Overall wellness
Deeper Metabolic Changes During 24 to 36 Hours
This is the most challenging period of the entire extended fasting.
At this period, the researchers are mostly interested in the process called autophagy.
It is the natural cellular recycling system that removes damaged cellular components while repurposing the materials.
Experts heavily studied this period due to the impact of autophagy on the human body and its ability to convert energy.
That’s why it is publicly presented in a viral simulation to emphasize how fasting promotes metabolic changes significantly in the body.

Benefits of 36-Hour Fasting
Further research about fasting is currently ongoing.
However, previous research has shown that fasting has health benefits, especially when practiced safely and correctly.
Here are some of the benefits of fasting that you must know:
- It can significantly influence cellular maintenance processes.
- It promotes individuals to consume tactfully.
- It leads to stored fat conversion for weight management success.
- It supports body regulation for blood sugar and insulin levels.
While fasting-related studies are ongoing, researchers are also seeking answers on the holistic benefits of fasting on the body.
Risks Associated with Prolonged Fasting
Don’t get too excited about fasting for too long.
Despite the health benefits of fasting, it’s also essential to acknowledge the downsides.
Fasting is not meant for everybody.
That’s why it’s better to be warned about it.
Fasting isn’t without feeling the symptoms, such as:
- Mood swings
- Dizziness
- Weakened body
- Dehydrated
- Headaches
- Concentration Troubles
- Fatigue
When you decide to fast, it’s recommended to consult a healthcare professional.
Specifically, fasting is risky for these specific people:
- Diabetics
- Individuals with eating disorders
- Medicated people
- Breastfeeding moms
- Patients with chronic pain conditions
Be clear on your intentions when fasting; it should not be because it’s trendy.
How to Stop Fasting?
Many people are also confused or unaware of how to “break their fast.”
Individuals should be concerned about this to prevent their bodies from being shocked.
After 36 hours of fasting, consuming meals quickly can be uncomfortable.
You aim to let your digestive system absorb food again.
Here are ways to stop your body from staying in fasting mode:
- Drink water slowly
- Eat with meals rich in fiber and protein.
- Never eat so quickly; savor it.
- Stop eating when you are full
Does Prolonged Fasting Make You Healthier?
Prolonged fasting does not necessarily make a person healthier.
Some people will typically fast for just 12 to 16 hours.
Health is not just determined by the hours of not eating alone.
You need to consider other factors that would contribute to better health.
Fasting isn’t the sole solution to achieve a healthy body, but it can significantly help.
The Adaptive Nature of the Human Body
The viral simulation in understanding the 36-hour fasting emphasizes how the human body can perform wonders.
That means how the body is adaptive, resilient, and efficient.
In the absence of food, the body will look for alternative fuel sources to convert them into temporary energy.
Now, the metabolism has adjusted, and the internal processes have been triggered to achieve body balance.
But we should remember that fasting is not a shortcut to a better body and health.
It doesn’t mean our body adapts to its function; we should disregard it.
Maintaining wellness is not just performed by fasting; it is best secured through numerous healthy habits.