Hunger strike doctors estimate that a well-nourished individual can survive without medical consequences on a diet of sugar and water for 30 days or more.
Fasting – it does a body good! – Search Videos
The longest period for which anyone has gone without solid food is 382 days in the case of Angus Barbieri (UK) (b. 1940) of Tayport, Fife, who lived on tea, coffee, water, soda water and vitamins in Maryfield Hospital, Dundee, Angus, from June 1965 to July 1966, His weight declined from 214 kg (33 st 10 lb) to 80.74 kg (12 st 10 lb). a weight loss of 276 pounds.
Fasting- I concur, Autophagy is the body’s natural intelligence in action — the built-in self-repair mechanism that activates only when you step away from constant feeding. When you fast, you aren’t depriving yourself; you’re commanding your biology to clean the house. Damaged cells, misfolded proteins, precancerous mutations — all get broken down and repurposed for energy and renewal.
That’s what Dr. Yoshinori Ohsumi’s Nobel Prize–winning discovery proved: fasting isn’t just spiritual or detoxifying — it’s cellular medicine. It’s what your body was designed to do when food isn’t available. The process restores mitochondrial efficiency, resets immune signaling, and clears inflammatory debris from tissues and the brain. This Japanese biologist’s Nobel Prize-winning research uncovered a revolutionary process: the human body eats its own damaged cells when it doesn’t receive food.
This process, called autophagy, plays a crucial role in maintaining our health by clearing out dysfunctional cells, and it may have far-reaching implications for aging and disease prevention. But what does this discovery reveal about our relationship with nourishment, and the body’s intrinsic survival mechanisms?
Autophagy is the body’s way of performing a kind of internal clean-up, eliminating waste and repairing damage. This discovery changes the way we think about fasting & nutrition. For years, we’ve been told the body’s energy comes only from food, but this breakthrough shows that the body has the ability to sustain itself by recycling its own cells when necessary. It challenges us to rethink our understanding of metabolism and survival.
Beyond its immediate health implications, this discovery opens the door to new possibilities for treating diseases like cancer and neurodegeneration. By understanding how the body scavenges and reuses its cells, scientists could develop therapies that promote the body’s natural repair processes. Could this new understanding of autophagy lead to groundbreaking treatments that slow down the aging process, or even cure diseases that are currently beyond our reach?
The idea that the body can sustain itself through its own resources calls attention to the resilience built into human biology. It shows us that, in times of stress or deprivation, the body is not helpless; rather, it is capable of remarkable feats of self-preservation. This discovery forces us to reconsider what we know about the body’s capacity for healing, and challenges us to look deeper into the science of life itself.
Ultimately, this Nobel-winning research presents an exciting new chapter in our understanding of human health and longevity. It is a testament to the ingenuity of the body and to the scientific exploration that continues to reveal the extraordinary ways in which we are equipped to survive. 
8 Health Benefits of Fasting, Backed by Science
Written by Rachael Ajmera, MS, RD — Updated on April 23, 2025 —
Medically reviewed by Amy Richter, RD – Search
Fasting may provide several health benefits, including weight loss, blood sugar management, and protection against medical conditions like cancer and neurodegenerative disorders. Despite its recent surge in popularity, fasting is a practice that dates back centuries and plays a central role in many cultures and religions.
Fasting is defined as abstinence from all or some foods or drinks for a set period. There are many different ways of fasting. Generally, most fasts are performed over 24–72 hours.
Intermittent fasting, on the other hand, involves cycling between periods of eating and fasting, ranging from a few hours to a few days at a time. Fasting can have health benefits, such as increased weight loss and better brain function.
Here are eight health benefits of fasting — backed by science.
1. Promotes blood sugar management by reducing insulin resistance
Several studies have found that fasting may improve blood sugar management, which may be helpful for those at risk of developing diabetes.
A 2023 studyTrusted Source of 209 people found intermittent fasting 3 days per week can reduce the risk of type 2 diabetes by increasing insulin sensitivity.
Decreasing insulin resistance can increase your body’s sensitivity to insulin, allowing it to transport glucose from your bloodstream to your cells more efficiently.
Coupled with the potential blood sugar-lowering effects of fasting, this could help keep your blood sugar steady, preventing spikes and crashes in your blood sugar levels.
A 2022 review of researchTrusted Source notes that intermittent fasting, including time-restricted feeding may reduce risk factors associated with metabolic syndrome, a group of five risk factors that increase the likelihood of type 2 diabetes, heart disease, and stroke. However, additional studies are still needed to compare the effects of fasting with restricting calories.
Summary
Intermittent fasting, including alternate-day fasting may help decrease blood sugar levels and reduce insulin resistance.
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2. Promotes better health by fighting inflammation
While acute inflammation is a natural immune process used to help fight off infections, chronic inflammation can seriously affect your health.
ResearchTrusted Source shows that inflammation may be involved in the development of chronic conditions, such as heart disease, cancer, and rheumatoid arthritis. Some studies have found that fasting can help decrease levels of inflammation and promote better health.
One 2022 reviewTrusted Source of 18 studies found that intermittent fasting could significantly reduce levels of C-reactive protein, which is a marker of inflammation.
A small studyTrusted Source discovered that practicing intermittent fasting combined with resistance training for 1 year decreased inflammatory markers and reduced certain heart disease risk factors compared to resistance training alone.
Summary
Some studies have found that fasting along with resistance training could decrease several markers of inflammation and may be useful in treating inflammatory conditions.
3. May enhance heart health by improving blood pressure, triglycerides, and cholesterol levels
Heart disease is considered the leading cause of death worldwide, accounting for an estimated 19 millionTrusted Source deaths globally in 2020. Switching up your diet and lifestyle is one of the most effective ways to reduce your risk of heart disease.
Some research has found that incorporating fasting into your routine may be especially beneficial for heart health.
One reviewTrusted Source revealed that alternate-day fasting could reduce levels of total cholesterol and several risk factors for heart disease in people with overweight compared to a control group.
Another reviewTrusted Source showed that alternate-day fasting could significantly decrease blood pressure, as well as levels of blood triglycerides, total cholesterol, and LDL (bad) cholesterol.
Summary
Fasting has been associated with a lower risk of coronary heart disease and may help lower blood pressure, triglycerides, and cholesterol levels.
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4. May boost brain function and prevent neurodegenerative disorders
Though research is mostly limited to animal research, several studies have found that fasting could have a powerful effect on brain health.
Animal studies from 2018Trusted Source and 2021Trusted Source have reported that fasting could protect brain health and increase the generation of nerve cells, helping to enhance cognitive function.
Because fasting may also help relieve inflammation, it could also aid in preventing neurodegenerative disorders. In particular, animal studies suggest that fasting may protect against and improve outcomes for conditions such as Alzheimer’s diseaseTrusted Source and Parkinson’sTrusted Source.
However, more studies are needed to evaluate the effects of fasting on brain function in humans.
Summary
Animal studies show that fasting could improve brain function, increase nerve cell synthesis, and protect against neurodegenerative conditions, such as Alzheimer’s disease and Parkinson’s.
5. Aids weight loss by limiting calorie intake
Many dieters experiment with fasting to try to lose weight. Theoretically, abstaining from all or certain foods and beverages should decrease your overall calorie intake, which could lead to increased weight loss over time.
One older reviewTrusted Source from 2015 showed that whole-day fasting could reduce body weight by up to 9% and significantly decrease body fat over 12–24 weeks.
Another reviewTrusted Source found that intermittent fasting was more effective in inducing weight loss compared to continuous calorie restriction.
In addition, other researchTrusted Source has found that fasting may lead to greater reductions in body fat and belly fat compared to continuous calorie restriction.
Summary
Fasting typically results in lower calorie intake, which may help reduce body weight and body fat.
6. Increases growth hormone secretion, which is vital for growth, metabolism, weight loss, and muscle strength
Human growth hormone (HGH) is a protein hormone central to many aspects of your health. Research shows that this key hormone is involved in metabolismTrusted Source, weight loss, and muscle growthTrusted Source.
Several studies have found that fasting could naturally increase HGH levels.
One review article noted that fasting for 37.5 hours can increase basal HGH concentrations by as much as ten times and also reduces the metabolic rate at which the body clears HGH.
Summary
Studies show that fasting can increase levels of human growth hormone (HGH), an important protein hormone that plays a role in growth, metabolism, weight loss, and muscle strength.
7. Could extend longevity
Several animal studies have found promising results on the potential lifespan-extending effects of fasting.
One 2021 studyTrusted Source analyzed the effects of periodic fasting on the human gut and found that fasting increased the diversity of helpful bacteria in the gut microbiome, including the Christensenella species, which are related to longevity.
The researchers also noted an increase in sirtuins, proteins involved in metabolic regulation that are also associated with longevity.
A 2021 reviewTrusted Source of older human and animal research has turned up similar findings, reporting that fasting could be effective in increasing longevity and delaying disease.
However, further studies are needed to understand how fasting may impact longevity and aging in humans and which fasting plans are most effective.
SUMMARY
Animal studies have found that fasting could delay aging and increase longevity, but human research is still lacking.
8. May aid in cancer prevention and increase the effectiveness of chemotherapy
A reviewTrusted Source published in the American Cancer Society Journal notes that intermittent fasting may benefit the treatment and prevention of cancer in some situations. It may decrease tumor growth and toxicity from chemotherapy in some people.
But they note that more high quality clinical trials are needed and recommend that people undergoing cancer treatment only do intermittent fasting as part of a clinical trial. For some situations and types of cancer, it could potentially have a negative effect.
Another reviewTrusted Source of test tube and animal studies suggests that fasting could reduce tumor progression and increase chemotherapy’s effectiveness.
Despite these promising findings, additional studies are needed to look at how fasting may influence cancer development and treatment in humans.
SUMMARY:
Some animal and test-tube studies suggest that fasting could block tumor development and increase the effectiveness of chemotherapy.
How to start fasting
There are many different types of fasts, making it easy to find a method that fits your lifestyle.
Here are a few of the most common types of fasting:
- Water fasting: This involves drinking only water for a set amount of time.
- Juice fasting: This entails only drinking vegetable or fruit juice for a certain period.
- Intermittent fasting: Intake is partially or completely restricted for a few hours up to a few days at a time, and a regular diet is resumed on other days.
- Partial fasting: Certain foods or drinks, such as processed foods, animal products, or caffeine, are eliminated from the diet for a set period.
- Calorie restriction: Calories are restricted for a few days every week.
Within these categories are also more specific types of fasts.
For example, intermittent fasting can be broken down into subcategories, such as alternate-day fasting, which involves eating every other day, or time-restricted feeding, which entails limiting intake to just a few hours each day.
SUMMARY:
There are different ways to practice fasting, which makes it easy to find a method that fits into just about any lifestyle. Experiment with different types to find what works best for you.
Safety and side effects
Fasting may not be suitable for everyone and may cause side effects. For example, if you have diabetes, fasting can lead toTrusted Source low blood sugar levels, which could be dangerous.
It’s best to talk with a doctor first if you have any underlying health conditions or are planning to fast for more than 24 hours.
Additionally, fasting is not generally recommendedTrusted Source without medical supervision for older adults, adolescents, people with underweight, or people undergoing cancer treatmentTrusted Source.
If you decide to try fasting, be sure to stay well-hydrated and fill your diet with nutrient-dense foods during your eating periods to maximize the potential health benefits.
Additionally, if fasting for longer periods, try to minimize intense physical activity and get plenty of rest.
summary
When fasting, be sure to stay hydrated, eat nutrient-dense foods, and get plenty of rest. It’s best to consult with a doctor before fasting if you have any underlying health conditions or are planning to fast for more than 24 hours.
The bottom line
Fasting may have potential health benefits, including weight loss, improved blood sugar management, heart health, brain function, and cancer prevention.
When coupled with a nutritious diet and healthy lifestyle, incorporating fasting into your routine could benefit your health. Fasting – it does a body good! – Search Videos
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