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How to perform long fasts: Your Comprehensive Guide

perform long fasts

Table of Contents

Are you ready to unlock the secrets of how to perform long fasts? Imagine the incredible benefits that await you – increased mental clarity, enhanced energy levels, and a rejuvenated body.

This captivating guide will delve into the art of performing long fasts, revealing the strategies and tips to help you embark on this transformative journey. Whether you’re a seasoned faster or a curious novice, get ready to discover the power of prolonged fasting and unlock the door to a healthier, more vibrant you.

Get ready to embark on an extraordinary adventure that will leave you feeling invigorated and inspired.

Key Takeaways

  • Unlock the secrets of long fasting for increased mental clarity, energy, and rejuvenation.
  • Discover strategies and tips for successful long fasting.
  • Activate autophagy for cell rejuvenation and overall health.
  • Consider a minimum effective dose of 72 hours for long fasts.
  • Prepare with a ketogenic diet and intermittent fasting.
  • Stay active and engaged during the fast.
  • Break the fast gently with protein-rich foods.
  • Consult a healthcare professional for guidance and safety.
  • Balance fasting with a healthy lifestyle.
  • Benefits include improved insulin levels, blood sugar control, and reduced risk of chronic diseases.

How to perform long fasts

We’re tired of hearing stories about nutrition. “Make 5 meals a day”, “nothing happens if you eat without hunger,” “guide yourself by calories,” and “breakfast is the most important meal.”…

We can find endless stories in the black age of nutrition and misinformation.

However, the light has long been seen at the end of the tunnel. It seems that all these meaningless claims are coming to an end.

Faced with the explosion of published articles on the benefits of fasting, the evidence seems so overwhelming that we reconnect with something that human beings (out of necessity) have done for most of their history, fast.

Instead of answering the question of: ‘fast yes or fast no?’, which has already become ‘current opinion’ in science, the articles focus on better understanding the effects of fasting depending on the hours you spend without eating.

As explained in this article, a 12-hour and 23-hour fast are not the same and do not have the same effects.

👉 In today’s article, you will discover what is interesting about performing long fasts and how to carry them out to have the best sensations and get the most benefits.

perform long fasts

What is autophagy?

One of the main benefits of fasting is activating a cellular mechanism known as autophagy.

Autophagy is a cellular mechanism that activates when the cell perceives a specific context or lacks essential nutrients and good energy.

Faced with this situation, the cell degrade parts of itself that it identifies as malfunctioning to obtain energy and manufacture them again once the energy stress disappears.

Therefore, the energy deficit cells suffer from fasting is one of the keys to manifesting all the benefits that we currently know it has to fast.

Not all systems run out of power at the same time

The more important it is for this body system’s survival. The longer it will take to suffer from this energy deficiency and thus activate autophagy mechanisms.

These systems are mainly the brain and immune systems. He thinks these systems can get up to 60% more energy when under stress than when they are not.

This is why long fasts are being raised to activate autophagy and, therefore, the regeneration mechanisms in these systems.

👉 Studies show that performing long fasts renews up to 40% of all defensive cells in the body.

Besides, it has been shown that those cells that are more aged. They have even begun to make mistakes even in serious pathologies such as multiple sclerosis, which have been shown to degrade.

As if that were not the case, long fasts also reverse immunosuppression caused by chemotherapy in patients who have had cancer.

As for the brain, there are nuances because, unlike the immune system, in many cases, its cells do not necessarily cause energy deficit. However, the brain realizes that it is in a context associated with deficiency (a high level of ketones, for example). So the brain activates regenerative mechanisms.

That said, fasting is key to the activation of these mechanisms. The brain is one of the most autophagy-dependent organs for its daily function and prevents degenerative pathologies.

What we consider long fasts

What we consider long fasts

This is one of the significant issues that remain to be resolved. The ends are evident.

It is clear that 7-day fasts activate autophagy in these bodily systems and that a fast of fewer than 23 hours does not (at least in the immune system).

See also
How to enhance your immune system?

But the question is: what is the minimum effective dose?

There is preliminary evidence that the minimum effective dose is 72 h. For example, this study shows that 72h compared to 24h fasting is more protective of immune cells in combination with chemotherapy therapy.

In turn, similar results are observed by extrapolating observations in fasted mice.

How to perform long fasts

Long fasts are one of the most effective ways to accelerate your progress towards your health and fitness goals. Your fat stores will be depleted. This ensures that your body burns mainly stored fat as energy when you start eating again, known as “fat adaptation,” It dramatically increases your ability to burn fat in a way similar to a physically active person. If you follow this plan correctly, you will burn fat much faster than someone following a low-carb diet without fasting.

Don’t worry about the first day.

Don’t worry about the first day, because it will be tough. You’ll feel weird and may even get dizzy, but that is perfectly normal. If you’re worried about passing out or feeling weak, lie down during the day and drink plenty of water (but not too much; there’s no need to chug gallons). After 24 hours, you should start feeling better.

If you have any concerns or questions, don’t hesitate to call your doctor!

Prepare your stomach.

Long fasts require a lot of preparation, so give yourself plenty of time. The first step is to prepare your stomach for the fast by taking a break from eating for several days before starting your fast. This can be done by eating a light meal the night before and the morning before you begin and drinking lots of water throughout that period. It would help if you also ate a light snack in the afternoon before starting your first day of fasting.

Know that you will be hungry and weak.

  • You will be hungry and weak. Extended fasts are not for beginners, so if you’re starting with fasting, start with something like the 5/2 diet described below. If you’re serious about doing long fasts, though—especially if your goal is to lose weight—then it’s essential to know this is normal. The first few days of any fast will be tough as your body adjusts to burning fat instead of sugar or glucose (a carbohydrate). You’ll likely feel irritable and lightheaded initially; headaches may also occur during this time.
Know that you will be hungry and weak.

Get some exercise, just not too much.

One of the benefits of fasting is that it forces you to rest, which will help protect your muscles. Exercise is a great way to keep your metabolism high, but don’t push yourself too hard. It’s also important not to over-exercise: don’t do anything strenuous or strenuous enough that you feel exhausted when done.

If possible, take advantage of any exercise opportunities while fasting by doing something easy like yoga or walking around the block at least once daily. But if there are no convenient opportunities for exercise nearby and you have other obligations (such as work), consider stretching in place instead!

Take a break from cooking.

The first thing you’ll want to do is take a break from cooking.

Don’t worry—we didn’t say stop eating altogether! You can still enjoy eating in different ways than you’re used to. Try eating out at restaurants and cafes. Enjoy meals with friends and family. Eat with your partner and kids—or even a pet or neighbor if they’re willing!

Keep your mind off food.

For the most part, it’s best to avoid thinking about food. You don’t want to give yourself any excuse to eat or drink something. Don’t talk about food, either. If your friend is talking about their favorite salad, change the subject as quickly as possible.

If you watch cooking shows—like MasterChef or Chopped—don’t watch them while fasting! It will be tough to resist eating when someone is making amazing food on TV right in front of you; better to avoid these shows altogether during your fast.

Don’t listen to podcasts that talk about food either; otherwise, you’ll find yourself listening intently and imagining all the delicious foods you could have if only this fast weren’t happening!

Don’t read about food online (there are plenty of other things worth reading on the internet). And don’t look at pictures of delicious meals and snacks – if there’s a temptation too great for even an experienced fasters mind, then it’s time for some self-control techniques like counting backward from 100 by sevens until they can finally look away from whatever was causing them pain.

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Also, try not smelling anything that would typically tempt one toward eating (chocolate cake baking in an oven nearby provides quite a strong odor!).

“Finally, do not touch any types of foods – not even a spoonful – while on your long fast, as this may cause distress when seeing what others eat around them or hearing how tasty it smells when prepared in front of them.”

Eat something. Just not too much.

Eat something. Just not too much.

Now that you’ve decided to fast, it’s essential to know how much to eat. Remember that you need to eat something. Your body needs fuel! Don’t overdo it—you don’t want your stomach growling and grumbling at the thought of food for days. On the other hand, if you eat too little food (or none), your body will go into starvation mode and start preserving its energy—it won’t have time for anything else but survival. You also don’t want to feel sick after eating; this will make fasting much harder than it needs to be!

The best rule of thumb is this: Eat just enough, so you’re not hungry anymore, but no more than that. If you’re starting with an eight-hour fasting window every day, aim for around 2 cups of vegetables or fruit per mealtime (about half a medium-sized apple). When your noon time comes again tomorrow morning, repeat those same steps until dinnertime arrives around 5 pm (and so forth).

Take care of your health.

While fasting is a safe and effective way to lose weight and improve your health, following a few essential rules is important.

  • Don’t fast if you are pregnant or breastfeeding. Both conditions require increased caloric intake, so they should not be combined with fasting.
  • Don’t fast if you have a history of eating disorders such as anorexia or bulimia. Fasting may trigger symptoms similar to those seen in eating disorders, which can be dangerous for someone who already struggles with them daily.
  • Be sure you’re taking care of your health before deciding whether or not to start fasting. If you’re diabetic, epileptic, or suffer from any other serious medical condition, consult your doctor before beginning any tasting regimen so that they can advise accordingly

Once you’ve realized all of the advantages of fasting for extended periods, you’ll need to be aware of a few guidelines to carry it out properly.

The three keys to consider are:

Before you start, perform 7 days of:

The ketogenic diet and Intermittent fasting to gain metabolic flexibility and deflate.

He has no choice but to mobilize fat reserves during a fast to the body.

This environment of fat mobilization and ketone body production (modified fat that can cross the blood-brain barrier and feed the brain) not only provides energy but also functions as a brain, signaling that the body is deficient and deepening autophagy activation.

The toxic context in which we live, where we eat 5 times a day and always have carbohydrates available, causes the body to ” forget” how to mobilize these fat reserves.

This mechanism is known as “glucose hysteresis,” or cellular memory. A prolonged fast without metabolic flexibility will reduce the positive effects and produce unpleasant symptoms. Besides, such interventions already cause an anti-inflammatory effect

👉 be sure that a hyperactive immune system will significantly resist an energy deficit.

During the 72-hour long fast, don’t stay home

If you stay at home thinking about the food, looking with desire at the fridge door, getting bored and tying you up… You probably won’t be able to keep fasting.

Take the opportunity to do exciting and fun things to steer your mind outwards. A good idea is to go for a walk in the mountains or walk with your bottle of isotonic water.

You can take the opportunity to make work calls, talk to a friend you haven’t spoken to in a long time, or your ex-partner (it’s up to you).

The important thing is that you do not stay locked up and think only of fasting. You should do quite the opposite. The more mobility you have in your life is, the less it will cost you to fast.

Some exciting tips are drinking water or liquids or introducing fine broth if needed. Although you may find it strange, the few calories that broth will bring you won’t boycott the stimulus about autophagy. However, they can be of great help.

Once you finish 72 hours, return gently

Consider that you haven’t used your digestive system in three days, so breaking long fasts with three black puddings isn’t appealing. It’s about introducing soft, cooked, protein-rich, and moderate-carb food.

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This is because cooking is a pre-digestion, so we make it easier for the stomach to return to the activity with peace of mind.

The proportion of macronutrients is due to proteins and amino acids needed to stimulate cell reconstruction once you have degraded the useless parts. An excellent example of a good post-fast diet is boiled chicken and, for example, cream of pumpkin and potatoes.

How often should I fast long?

How often should I fast long?

To stimulate the regeneration of the body’s essential systems, you have to generate significant stress. Therefore, we must space out prolonged fasts enough so they do not wear us down

It is generally considered that fasting every 2-3-4 months is sufficient to get all the benefits and not stress the body too much.

Understanding the Health Benefits

Performing long fasts can have a range of health benefits. By adopting a healthy diet and incorporating fasting periods into your routine, you can positively impact your insulin levels, blood sugar levels, and even reduce the risk of heart disease and other chronic conditions.

Exploring Different Fasting Methods

There are various fasting methods, such as alternate-day fasting, intermittent fasting schedules, or prolonged fasting. Shorter fasts, like a 48-hour fast, can help with weight loss and metabolic health, while longer fasts, such as a 72-hour fast, may provide deeper cellular benefits and promote brain function.

Ensuring Safety and Well-being

Before embarking on any fasting method, it’s important to consult with a healthcare provider or medical professional. They can guide you in choosing the most suitable fasting method based on your health conditions and goals. Additionally, paying attention to your body’s hunger levels, staying hydrated through water consumption, and maintaining essential electrolyte levels are crucial for a safe and effective fasting experience.

Balancing Fasting with a Healthy Lifestyle

To optimize the potential benefits of fasting, it’s essential to complement it with a balanced diet on non-fasting days. This includes consuming nutrient-dense foods and maintaining regular physical activity levels. By incorporating fasting as part of a healthy lifestyle, you can promote weight loss, improve metabolic health, and enhance overall well-being.

FAQs about how to perform long fasts

What is a fast?

A fast is a period in which one abstains from food and drink. It can also refer to the act of fasting.

What is a long fast?

A long fast is a period when you don’t eat. The length of a long fast varies but generally lasts between three and seven days.

How to perform a long fast?

The best way to perform an extended fast is to ensure you’re well-rested and hydrated before you start. Drink plenty of water, and get as much sleep as you can.

What are the benefits of fasting?

Fasting has many benefits and justt limited to weight loss.

Fasting has been shown to improve mood, boost energy levels, and help prevent disease. This article will explain how fasting can benefit you and how you can get started with your first fast today!

How long should I fast?

The length of your fast should depend on your goals. You can fast for as long as you like, but it’s important to know what kind of results you’re looking for and ensure that your fast is long enough to give you those results.

How long should I fast before I see results?

A prolonged fast is 40 days or more, and you should expect to see results after that amount of time. It’s important to note that you’ll have to stay diligent and consistent with your eating habits after the fast for your body to not bounce back into its old habits.


  • Perform long fasts is a strategy to stimulate protected system autophagy for energy deficits.
  • Long fasting has a profound regenerative effect on the brain and defensive system
  • It appears that the minimum effective dose is 72 hours.
  • Preparation for fasting with the ketogenic diet and intermittent fasting improves the experience and optimizes results
  • A good frequency of fasting is to do it every 3-4 months.

Note: The information provided is for general guidance purposes only and should not replace personalized advice from a healthcare professional.