The Best Method of Fasting for Longevity, Health & Weight Loss 

When and how much should we eat for longevity? And what is fasting for longevity?

Research shows that adjusting food intake can influence how we age. Eating less — whether through caloric restriction or fasting — has been linked to:

• Slower aging and extended lifespan
• Reduced risk of age-related diseases
• Improved metabolic and cellular health

In fact, among studied longevity interventions, including prescription drugs, hormone therapies, senolytics, supplements, and parabiosis (blood transfers), caloric restriction has the greatest impact on longevity.

Meal timing matters: Eating within specific windows (e.g., intermittent fasting) can enhance longevity benefits. In this article, we’ll explore:

• Understanding caloric restriction vs. fasting 
• The scientific mechanisms behind fasting
• The different types of fasting methods
• The best fasting method for health, weight loss, and longevity
• When fasting can be dangerous or unhealthy
• Practical tips for implementing fasting safely and effectively

For the best foods and diet to support longevity, check out our NOVOS Longevity Diet, a complete guide on the optimal longevity diet.

So, that leaves the question of when and how much to eat for optimal longevity — which we cover in this article.

Regarding how much to eat, almost a century of scientific research shows that eating less slows the rate of aging, extends lifespan, and reduces the risk of many aging-related diseases, including heart disease, Alzheimer’s and cancer.  

You can eat less in two ways: through caloric restriction or fasting.  

This article focuses on fasting. We’ll first compare the research for caloric restriction vs. fasting, discuss the best method to fast, and will wrap up with some important things to consider when fasting. 

Caloric Restriction vs. Fasting  

Caloric restriction means eating less all the time, whereas fasting means eating less, sometimes.

With caloric restriction, instead of consuming, say, 2,000 calories per day, one would consume 25% fewer calories per day. Caloric restriction has shown to extend lifespan and reduce the risk of many aging-related diseases (R,R,R).  

However, it’s not easy to continuously eat less, and to do so for years or even the rest of your life. While some people believe you will always feel hungry, this is also somewhat relative: After a while, many people acclimate to the calorie restriction.

In fact, caloric restriction does not have to be terribly difficult. A simple way to eat less is just by eating two meals per day. Not only will this save you some money, but a lot of time, too (no prep or eating time!). And while you may consume more calories per meal, most people find it difficult to consume as many calories in two meals as they would in three or four.

One point to note about prolonged caloric restriction is that it can have an impact on your hormones, neurotransmitters, and ultimately, how you feel. For many people, it can wear on their mood and quality of life, so this is something to keep in mind when it comes to the percentage restriction and the duration.

While caloric restriction means restricting calories throughout the day, fasting means going without food for specific periods.

Often, the boundaries between caloric restriction and fasting are somewhat blurry. After all, if you fast regularly, then you’re also likely to restrict calories overall. 

The Scientific Mechanisms Behind Fasting

Fasting for longevity isn’t just about reducing calorie intake — it triggers powerful biological processes that promote longevity and metabolic health. Two key mechanisms behind fasting’s benefits are autophagy and insulin sensitivity.

Autophagy: The Body’s Cellular Cleanup Process

Autophagy is the body’s way of removing damaged or dysfunctional cells and recycling cellular components to create new, healthy cells. Fasting activates autophagy by reducing nutrient availability, signaling the body to clear out waste and regenerate.

• Why it matters: Enhanced autophagy is linked to slower aging, reduced inflammation, and lower risk of neurodegenerative diseases like Alzheimer’s and Parkinson’s.
• When it happens: Studies suggest that autophagy ramps up after 16 to 24 hours of fasting, with prolonged fasting (24+ hours) leading to deeper cellular repair.

Insulin Sensitivity: Balancing Blood Sugar

Fasting improves insulin sensitivity, which means the body becomes more efficient at regulating blood sugar levels and using insulin properly.

• Why it matters: Poor insulin sensitivity is a major factor in type 2 diabetes, weight gain, and metabolic disorders.
• How fasting helps: By lowering insulin levels and allowing the body to switch to fat-burning mode, fasting reduces blood sugar spikes and improves overall metabolic function.

These mechanisms highlight why fasting is a powerful tool for longevity, disease prevention, and metabolic health.

Types of Fasting: What’s the Difference?

The most common form of fasting is intermittent fasting (IF). This method involves cycling between eating and fasting, typically lasting 12 hours to two days. During fasting periods, no calories are consumed, while eating windows allow for regular meals. Note that in order for this to be considered IF, there must be fewer calories consumed than on a normal day. If not, scientists technically refer to it as “Time-Restricted Eating” (TRE).

Another approach is prolonged fasting, which extends beyond two days and is done less frequently — usually every few weeks or months. This longer fasting period may provide deeper cellular benefits, including enhanced autophagy and metabolic reset.

In simple terms:

• Intermittent fasting = shorter, more frequent fasts.
• Prolonged fasting = longer fasts, done less often.

The six most popular fasting methods are: 

1. Intermittent Fasting

Intermittent fasting has gained widespread attention for its health benefits, including weight loss, improved metabolic health, and enhanced longevity. This dietary approach cycles between periods of eating and fasting, with fasting durations typically ranging from 12 hours to two days.

There are various ways to practice intermittent fasting, including time-restricted eating (e.g., 16:8 method), alternate-day fasting, and calorie restriction plans — allowing for flexibility based on individual goals and lifestyles. However, as mentioned earlier, for it to be technically considered an intermittent fast, you would have to be consuming substantially fewer calories over the timeframe measured. If, however, you are consuming approximately the same or more calories, but eating only during a fixed number of hours (12 or fewer), it would be considered Time-Restricted Eating (TRE); more on this in the next section.

People have been labeling TRE as intermittent fasting so often that many now use the terms interchangeably.

2. Time-Restricted Fasting and The 16:8 Method

Time-restricted fasting, also known as time-restricted feeding or time-restricted eating, is a popular form of intermittent fasting that focuses on when you eat rather than what you eat. The most common variation is the 16:8 method, where you fast for 16 hours and eat within an eight-hour window.

There are many variations of this method. Some people only eat within a six- or even four-hour window, while other people simply skip breakfast or dinner every day. 

When Should You Schedule Your Eating Window?

Emerging research suggests that earlier eating windows (such as eating between 8 a.m. and 4 p.m.) may offer greater metabolic benefits compared to late-day eating (e.g., noon to 8 p.m.). This is because our metabolism fluctuates throughout the day.

• Morning and early afternoon: The body is better equipped to process food, efficiently managing insulin, glucose, fats, and amino acids. This also helps to mitigate oxidative and inflammatory stress, both of which naturally rise after meals.
• Late evening and night: Metabolism slows down, making it harder to process food efficiently, potentially leading to higher blood sugar levels, weight gain, and increased risk of metabolic disorders.

In one study, men at risk for type 2 diabetes who adhered a nine-hour window eating period from 8 a.m. to 5 p.m. had a 36% reduction in their glycemic response to a meal and reduced fasting triglycerides compared to men who ate during a more delayed 9-hour time window from noon to 9 p.m. (R). 

Another study showed that insulin sensitivity, blood pressure and oxidative stress improved significantly in men with prediabetes that ate in an eight-hour period (between 7 a.m. and 3 p.m.) versus people who ate in a 12 hour period (from 7 a.m. to 7 p.m.) (R). 

This and many other studies show that when you eat has a big impact on your metabolism and health! (R)

3. One-Day Fasting and The 5:2 Method

One-day fasting involves going 24 hours without food, typically once or twice a week. Some people follow this approach by fasting one day per week, while others practice it every other day — a method known as alternate-day fasting.

Another variation is the 5:2 diet, where individuals significantly reduce calorie intake (300 to 600 calories) on two non-consecutive days per week while eating normally on the other five days. While this isn’t strict fasting, it still creates a substantial caloric deficit, offering many of the same metabolic benefits.

4. Multiple-Day Fasting (Prolonged Fasting)

Multiple-day fasting, also known as prolonged fasting, involves abstaining from food for two or more consecutive days. Common approaches include:

• Fasting for two days each week
• Fasting for three days once a month
• Fasting for three days every three months

Fasting for this prolonged period turns on and off many biological processes that are associated with longevity. For example, AMPKinase and autophagy are significantly upregulated, while mTOR is downregulated. You can learn more about these processes in our article, The Pathways of Aging: Growth Pathways and Nutrient Sensing.

5. Alternate Day Fasting Plan

ADF involves structured fasting periods that activate metabolic switching, allowing the body to burn fat stores for energy. This process helps in managing calorie intake while improving insulin sensitivity and blood sugar regulation. ADF typically follows a pattern of fasting every other day, making it easier to adhere to compared to daily fasting protocols.

The health benefits of ADF are backed by numerous randomized controlled trials, which show that this fasting regimen can:

• Reduce body weight and body fat.
• Enhance cardiometabolic risk factors like blood pressure and cholesterol levels.
• Improve fasting glucose levels, reducing the risk of cardiovascular disease.

6. Fasting-Mimicking Diet (FMD)

The Fasting-Mimicking Diet (FMD), developed by Dr. Valter Longo, is a modified form of fasting that allows for minimal food intake while still activating the biological benefits of fasting. Instead of complete fasting, you follow a low-calorie, plant-based diet for five days, designed to mimic the effects of prolonged fasting without total food deprivation.

• How it works: Over a five-day period, calorie intake is strategically reduced — typically around 1,100 calories on day one, followed by 800 calories per day for the next four days.
• What you eat: The diet focuses on plant-based, nutrient-dense foods with a specific ratio of low protein, moderate carbs, and healthy fats to trigger fasting-like metabolic responses.
• Benefits: Research shows that FMD can promote autophagy, reduce inflammation, support longevity, and improve metabolic health, making it a structured alternative to traditional prolonged fasting.

Since FMD provides some nourishment, it is often considered a more sustainable and accessible approach to prolonged fasting while still delivering its key benefits.

Fasting for Longevity: How To Do It Right

With so many fasting methods available, the key question is: what’s the best method of fasting for longevity? And what should you keep in mind to ensure you’re fasting safely and effectively?

Let us first say that almost every fasting method is healthy (as long you don’t overdo it and pay attention to some caveats we explain below). 

Fasting activates many geroprotective (“anti-aging”) mechanisms, like inducing autophagy, which means cells will digest more waste material that otherwise accumulates which contributes to aging (R,R) and the activation of various protective genes, like those that code for sirtuins (R) or that reduce inflammation (R,R).

Even very short periods of fasting confer considerable health benefits. For example, when you fast for 12 hours, you will see improvements in metabolism, cellular repair, gene expression, insulin sensitivity, and so on. (R) (Luckily, fasting for 12 hours is quite easy: just don’t eat anything after dinner — e.g., from 7 p.m. until 7 a.m. the next day.) 

It’s therefore not surprising that fasting can extend lifespan. For example, rats that fasted every other day lived 8% longer than rats that could eat whenever and as much as they wanted (R).

Mice that fasted for four consecutive days every two weeks lived on average 33% longer (64 weeks, compared to 48 weeks for non-fasting mice) (R):

So What’s The Best Fasting Method for Longevity? The Case for a Three-Day Fast

One of the most effective fasting approaches for longevity is a three-day fast, done either monthly or at the start of every season (autumn, winter, spring, summer).

Why three days?

• Lower IGF-1 & Insulin: IGF-1 (a hormone linked to aging) and insulin levels drop significantly after three days, improving cellular maintenance and metabolic health.

• Deep Ketosis: Proper ketosis, where the body shifts fully into fat-burning mode, begins after two to three days. While ketone production starts earlier, levels become significantly higher and more effective after at least two full days.

• Autophagy & Stem Cell Rejuvenation: Studies show that three-day fasts can reboot stem cells and enhance immune function, effects that are less pronounced in shorter fasts.(R,R)

What Happens in Your Body While Fasting?

First 4-6 hours after your last meal

The blood sugar levels from your last meal decline in the blood. That’s also why you start to feel hungry during this period. 

4 to 24 hours after your last meal

Given blood sugar levels get too low, the body starts to break down glycogen stores in the liver and muscles to produce  glucose, which is needed to maintain your blood sugar, which is required by the brain. Your body also starts to break down fats (triglycerides)into free fatty acids that enter your bloodstream to provide an alternative source of energy to glucose. 

1-3 days after your last meal

After about the first 24 hours, glycogen levels get depleted. Ketosis starts, as the body produces ketones. This is primarily to keep the brain working, but can be utilized by other organs as well. 

Normally, the brain relies on glucose (not fats or proteins) to function. Given glucose is hardly available at this point, the liver will produce ketones that will serve as another fuel for brain cells. 

Ketones are made from free fatty acids. Free fatty acids are released from fat cells that normally store fat as triglycerides. 

During fasting, the triglycerides in the fat cells are broken down into free fatty acids, which enter the blood and reach the liver where they are converted into ketones The ketones enter the blood and reach all tissues, including the brain. These ketones are acetone, acetoacetate and beta-hydroxybutyrate. Ketones have various health benefits, such as reducing inflammation, improving brain health and neurogenesis (creating of new neurons) and improving metabolism (R). Ketones are also the main reason why people often say they can think more clearly around the second or third day of fasting.

3 days after your last meal

Ketosis is strongly activated. The ketones exert various beneficial effects, especially for the brain. Other regulatory mechanisms are in full swing, like autophagy, increased insulin sensitivity, and improved stem cell maintenance. Stem cells are repaired and get extra maintenance (R). Levels of ghrelin, the hunger hormone, decline around day 3, so people start to experience much less hunger. IGF-1, a hormone that speeds up aging, now starts to significantly decline. Insulin levels are greatly reduced. The levels of the beta-hydroxybutyrate ketone are around 1.5-3 mM. 

As you can see, various very healthy and beneficial effects only spring into action after fasting for a minimum of two to three days, and ideally three days. 

After three days, ketosis really gets going, IGF-1 and insulin start to get really low, and stem cells start to maintain and protect themselves. 

That is why we at NOVOS are proponents of doing a three-day-fast every month or every new season, assuming your healthcare professionals agree that you are in a healthy place to do so. 

Fasting is a great method to reduce the risk of various diseases, and to slow down aging and live longer. 

However, fasting can also entail risks and can even be dangerous. In many cases, fasting can be done wrong, so it’s important to take careful steps to mitigate any risks. 

How Intermittent Fasting Can Help with Weight Loss

One of the key reasons people turn to intermittent fasting is for its ability to help people lose weight. By restricting calorie intake during specific eating periods, the body shifts into metabolic switching, where it burns stored fat for energy. Alternate day fasting and time-restricted eating have been shown to support fat loss while potentially preserving muscle mass, especially when combined with resistance training and adequate protein consumption.

Research, including randomized controlled trials, shows that intermittent fasting regimens can result in modest weight loss and improved body composition. These benefits are enhanced when paired with a healthy diet rich in nutrient-dense foods like lean protein, healthy fats, and plenty of vegetables.

Benefits of Intermittent Fasting Beyond Weight Loss

While weight management is a major draw, the benefits of intermittent fasting go beyond the scale. Studies suggest that fasting can improve insulin sensitivity, regulate blood sugar, and reduce metabolic risk factors associated with chronic diseases such as cardiovascular disease, type 2 diabetes, and obesity. Intermittent fasting benefits also include better heart health through lowered blood pressure and improved cholesterol levels.

Fasting periods can help reduce nighttime eating, a habit associated with poor metabolic outcomes. By optimizing energy utilization and lowering inflammation, intermittent fasting supports overall metabolic health and may reduce complications linked to chronic diseases.

Intermittent fasting is not just about weight loss — it also addresses various chronic diseases and improves metabolic health. Research, including randomized controlled trials, suggests that fasting can improve insulin resistance, reduce fasting glucose levels, and lower inflammation — key factors in managing metabolic disorders such as diabetes and heart disease. By enhancing cardiometabolic health, fasting supports better cholesterol profiles, reduces blood pressure, and lowers the risk of complications linked to chronic diseases. 

In one study, the three popular ways to improve metabolism — eating fewer calories every day (caloric restriction), combining reduced calories with specific fasting days (CR + IF), and practicing intermittent fasting on its own (like alternate-day fasting, a 5:2 schedule, or eating only during an 8-hour window) — all delivered very similar benefits. No matter which approach you choose, you’ll likely lose body and belly fat, lower LDL cholesterol and blood pressure, reduce inflammation and oxidative stress, and improve insulin sensitivity, all while preserving (or even building) lean muscle mass.

Intermittent fasting by itself often matches or even slightly exceeds the benefits of continuous calorie cutting, particularly for fat loss and insulin sensitivity, so adding fasting to a calorie-restricted diet doesn’t change the overall outcome much.

The real advantage? Most people find intermittent fasting easier to stick with than keeping up a constant 20%–30% calorie deficit, and aligning your eating window with your natural sleep–wake rhythm (for example, ending meals earlier if you’re an early bird) can make it even more sustainable and boost those health gains.

When Fasting Can Be Dangerous or Unhealthy

While fasting has numerous health benefits, it’s not without risks. If done improperly or too frequently, fasting can lead to muscle loss, nutrient deficiencies, excessive weight loss, increased stress, and potential hormonal imbalances — especially in women. Here’s what to watch out for.

1. Excessive Muscle Breakdown

If you fast, especially longer than a day, you can start to suffer from muscle breakdown which can lead to muscle pain, including sometimes severe back pain. There are ways to mitigate this, as we explain below (like taking caprylic acid and electrolytes). However, for older individuals, who are subject to muscle breakdown and sarcopenia, prolonged fasts can cause more harm than good. Always check with your medical doctor before considering fasts, especially those that last for more than 24 hours.

2. Nutrient Deficiencies

One of the biggest risks of frequent fasting is worsening existing micronutrient deficiencies.

Micronutrient deficiencies are very common. Most people, even those that eat healthy, are deficient in various micronutrients or take in suboptimal levels, typically without even knowing it.

• 70% of people don’t consume enough magnesium, a mineral essential for metabolism and longevity.
• Many people are deficient in iodine, B vitamins, iron (especially women), omega-3s, vitamin D, vitamin K, and zinc.

These deficiencies lead to all kinds of health problems, from brain fog and fatigue to an increased risk of cancer, Alzheimer’s and accelerated aging. 

We explain here why so many people are deficient and why the vitamin and mineral recommendations of governments are substandard. 

Fasting, which means eating less, can further lead to deficiencies, which in the long term can compromise your health and accelerate aging. 

So if you fast, make sure you take supplements. Because even if you eat healthy, you do need supplements. 

3. Excessive Weight Loss

Fasting can lead to too much weight loss, especially in people who have a normal weight or are already thin or underweight. This is what you see with too much fasting, like with alternate-day fasting periods, in which you fast each other day, which can easily lead to too much weight loss. 

If you experience too much weight loss, it’s better to fast one day per week, or even better, for three days every new season, as we explained earlier.

Causing too much stress for your body

Fasting is a physiological stressor — it increases the release of cortisol and adrenaline. While this can be beneficial in moderation, for those with:

• Weakened immune systems
• Chronic illnesses
• Micronutrient deficiencies
• An unhealthy gut microbiome

Fasting may add too much stress to an already compromised system, potentially worsening health rather than improving it.

4. Causing Too Much Stress For Your Body

Fasting is a physiological stressor — it increases the release of cortisol and adrenaline. While this can be beneficial in moderation, for those with:

• Weakened immune systems
• Chronic illnesses
• Micronutrient deficiencies
• An unhealthy gut microbiome

Fasting may add too much stress to an already compromised system, potentially worsening health rather than improving it.

5. Fasting and Women: Proceed with Caution

Studies seem to indicate that fasting could be less beneficial, or cause more side-effects, in women than in men. 

For example, in one study, fasting improved insulin sensitivity in men but worsened it in women (R). This was during alternate-day fasting, a very intensive and demanding method of fasting, which we think is too taxing for the body. 

Also, studies in rodents show that fasting can have different effects on male versus female animals (R,R). 

Furthermore, women are more prone to micronutrient deficiencies, like iron or iodine. If they fast regularly, they can worsen these deficiencies and in the long term be worse off. 

So in general, women should be careful with fasting, and make sure to not overdo it. For example, instead of fasting every week, they could consider doing a 3 day fast every new season. 

6. Taking Specific Medications

If you fast, you don’t consume important electrolytes. These are minerals like magnesium, potassium, sodium and calcium. You need electrolytes to perform many important functions, like conducting nerve signals, contracting your muscles (including of your heart) and to regulate innumerable functions in your body. 

If you are a heart patient, or take medication that can already lead to reduced electrolytes (e.g. specific drugs that reduce hypertension) you could be at risk of more side-effects of fasting. 

One way to mitigate this problem is by taking electrolytes during fasting (see below). 

Who Should Be Careful With Fasting? 

You should not fast when you: 

• Are too thin or underweight or easily lose too much weight
• Are malnourished and deficient in micronutrients
• Have a chronic disease 
• Already feel weak in general or suffer from suboptimal health 
• Take medication that could interfere with fasting, especially ones that lower electrolytes (see further down)
• Are pregnant or breastfeeding
• Are under 18 years old. 
• Are over 60 years old

Important Things To Do During Fasting

Fasting can be very healthy, if done properly. As mentioned earlier, it’s important to not overdo it. This means fasting too much (like every other day), which can cause too much stress on the body and lead to important deficiencies in micronutrients. 

Secondly, during fasting, we advise to do the following:

1. Take electrolytes (sodium, potassium, magnesium and calcium)

The body needs electrolytes to function properly (e.g. for nerve conduction, muscle contraction, etc). Taking these during fasting can reduce side effects (like dizziness, fatigue, brain fog, heart palpitations, etc.). 

For each day of fasting, one can consider taking a few grams of potassium, 400-500 mg of magnesium, 1000 mg of calcium, and around 1000 to 2000 mg of sodium. Ideally, these electrolytes are divided over two doses, one in the morning and one in the evening.

2. Take 1 tablespoon (15 ml) of caprylic acid up to three times per day during fasting 

This is more of a hack than a requirement. Caprylic acid is a medium chain fatty acid that has various health benefits. It’s a unique fat, in the sense that the brain cells can use it as energy (mostly, brain cells only use sugar or ketones to function properly). 

Caprylic acid can also be easily converted into ketones by the body, so when you take caprylic acid during fasting, you can get into ketosis faster and increase ketone levels. 

Another benefit is that caprylic acid contains some calories (15 ml, or one tablespoon of caprylic acid per day corresponds to 130 calories), so your body still has a little bit of energy. That way, you reduce the stress of too much fasting on the body, and reduce the muscle breakdown and muscle aches and cramps. 

Fasting: A Natural Way To Enhance Health and Longevity

Fasting for longevity is a great way to improve health, slow down aging, and reduce the risk of many aging-related diseases, like heart disease, type 2 diabetes and even Alzheimer’s and cancer.  

Humans are not made to eat all day. In prehistoric times, we often could not eat during large parts of the day, or even for many days or weeks. 

Regular fasting is a natural state of the body, and we should incorporate it back into our lives to unlock the many health benefits. 

But it’s important to do fasting right, by making sure you are not worsening the micronutrient deficiencies that almost everyone is already suffering from, and by making sure you don’t fast too much or put excess stress on the body. 

Beyond fasting by actually eating nothing, there are also various “fasting-mimetics”: substances that can induce many of the health benefits or mechanisms you activate during fasting, like inducing autophagy, activating DNA protection, antioxidant enzymes, repair proteins, and so on. 

NOVOS Core is a longevity supplement that contains various ingredients that can partially mimic a fasting state in the body, like glucosamine (by inducing autophagy – the digestion of proteins and other waste that otherwise accumulates during aging), fisetin (by improving metabolism and reducing inflammation), pterostilbene (by activating AMPK, an “energy deficiency sensor”), or microdosed lithium (by inducing autophagy). 

Learn more about those anti-aging ingredients here. 

FAQ About Fasting for Longevity

What’s the best fasting method for longevity?

A three-day fast once a month or every new season appears to offer the most benefits, including deeper cellular repair, reduced insulin, and improved metabolic health.

How does fasting help you live healthier for longer?

Fasting activates processes like autophagy and improves insulin sensitivity, which helps reduce inflammation, clear out damaged cells, and support healthy aging.

How long should I fast for longevity and get benefits like autophagy?

Autophagy tends to ramp up around 16 to 24 hours into a fast and gets stronger the longer you go, especially after two to three days.

Can fasting help with weight loss, too?

Yes, especially when done intermittently. It can help your body burn fat for fuel, improve blood sugar, and reduce body fat over time.

What’s the best time of day to eat during a fasted lifestyle?

Earlier eating windows — such as eating between 8 a.m. and 4 p.m. — may provide better metabolic benefits than late-day eating. Morning metabolism is more efficient at managing blood sugar, fats, and amino acids.

Can fasting improve brain health?

Yes. Fasting enhances ketone production, which provides clean fuel for the brain. It also promotes autophagy and reduces inflammation, which may protect against neurodegenerative diseases like Alzheimer’s.

Is fasting safe for everyone?

No. If you’re underweight, pregnant, breastfeeding, under 18, over 60, or have certain health conditions, always check with a doctor first.

What should I do to fast safely?

Take electrolytes, consider adding caprylic acid, and make sure you’re not deficient in nutrients. A supplement like NOVOS Core can help support your body during fasts.