Skip to content

What Happens to Your Body When You Go on a Hunger Strike?

4 min read

According to research published by the Bahrain Independent Commission of Inquiry, healthy individuals may endure 55 to 75 days on a hunger strike before facing a risk of death. This drastic act of protest sets off a series of physiological changes as the body enters a state of extreme starvation, fundamentally altering its function to survive.

Quick Summary

The body’s response to a hunger strike involves a staged process of fuel consumption. It first exhausts its glucose stores, then enters ketosis by burning fat, and finally begins breaking down muscle and vital organs for energy, leading to severe and potentially fatal consequences.

Key Points

  • Initial Response: In the first few days, the body uses stored glucose (glycogen) from the liver, causing initial hunger pangs that typically subside as the body adapts.

  • Ketosis Phase: After glycogen is depleted, the body enters ketosis, burning fat for energy; this phase can last weeks and causes dizziness and fatigue.

  • Starvation Mode: Once fat stores are gone, the body begins catabolizing muscle tissue and vital organs for energy, leading to severe muscle wasting.

  • Organ Failure: The breakdown of vital organs, including the heart, liver, and kidneys, increases exponentially after several weeks, with cardiovascular collapse being a frequent cause of death.

  • Refeeding Syndrome: The reintroduction of food after prolonged starvation is extremely dangerous and can cause fatal electrolyte shifts and organ dysfunction if not medically supervised.

  • Neurological Damage: Severe fasting can lead to nerve damage, causing vertigo, vision loss, confusion, and other cognitive impairments.

  • Psychological Toll: Mental health is also heavily impacted, with strikers experiencing increased irritability, aggression, apathy, and difficulty sleeping.

In This Article

The Initial Phase: Days 1-3

When a person first begins a hunger strike, the body initially relies on its primary energy source: glucose. This glucose is stored in the liver and muscles as glycogen. During the first 24 to 72 hours, these glycogen reserves are rapidly depleted. As this happens, blood sugar levels drop, which can cause intense hunger pangs, irritability, and a general feeling of weakness. After a few days, however, these hunger pangs often subside as the body adapts to the lack of food intake. The body is already preparing for the next stage of energy mobilization.

The Body's Search for Fuel

To cope with the absence of incoming calories, the body triggers a metabolic shift. This adaptation is an evolutionary response to periods of famine, designed to help our ancestors survive when food was scarce. The feeling of a lifted spirit or serenity that some hunger strikers experience during the early stages may be linked to hormonal changes that once spurred early humans to find food creatively. However, this is a temporary and misleading phase before the real physical and mental toll begins.

The Ketosis Phase: Weeks 1-3

Once the body’s glycogen stores are exhausted, it enters a state called ketosis. The liver begins to convert fat stores into ketone bodies, which can be used by the brain and other tissues for energy. This process can last for several weeks, depending on the individual's body fat reserves. While ketosis provides a temporary energy source, it is not without side effects. Symptoms that may arise during this phase include dizziness, fatigue, and a low heart rate. The hunger striker will experience significant weight loss as their body consumes its fat reserves.

Psychological and Physical Effects

As the hunger strike continues, mental effects become more pronounced. Irritability, anger, and aggressiveness are common as the brain chemistry shifts. Apathy and depression may also set in, and sleep can become difficult and scarce. Physically, the striker will feel cold as their metabolism slows down to conserve energy. Abdominal pain is also a frequent complaint during this stage.

Starvation Mode and Organ Failure: Weeks 4+

This is the most critical and dangerous phase of a hunger strike. After the fat reserves are depleted, the body has no choice but to begin breaking down protein from muscle tissue and vital organs for energy. This process is known as protein catabolism. Muscle wasting is severe, making it difficult or impossible to stand. Critical organs, including the heart, kidneys, and liver, are all vulnerable to this process.

The Path to Irreversible Damage

  • Cardiovascular System: The heart is a muscle, and as it is broken down, heart arrhythmias and eventual cardiovascular collapse become an acute risk. This is often the ultimate cause of death.
  • Neurological System: Prolonged deprivation leads to nerve damage. This can cause severe vertigo, double vision, loss of hearing, and eventual blindness. Confusion and incoherence are also common.
  • Immune System: Protein deficiency severely impairs the immune system, making the body highly susceptible to infection. Wound healing also slows dramatically.
  • Kidney Function: Dehydration and electrolyte imbalances can lead to kidney failure, causing urine to become dark or stop entirely.

Comparison Table: Phases of a Hunger Strike

Feature Initial Phase (Days 1-3) Ketosis Phase (Weeks 1-3) Starvation Phase (Weeks 4+)
Primary Fuel Source Stored Glucose (Glycogen) Body Fat Protein (Muscle and Organs)
Key Sensation Intense hunger pangs, then abatement Dizziness, fatigue, weakness Extreme weakness, coldness, severe pain
Weight Loss Moderate, fluid-based loss Significant, fat-based loss Rapid, severe muscle-based loss
Cognitive Effects Irritability, mood swings Irritability, apathy, depression Confusion, incoherence, mental lethargy
Risk of Death Minimal Low to Moderate High to Acute

The Dangers of Refeeding Syndrome

Even if a hunger striker decides to end their fast, the refeeding process can be perilous. Refeeding syndrome is a potentially fatal condition caused by dangerous shifts in electrolytes and fluids when nutrition is reintroduced too quickly after a period of prolonged starvation. The metabolic stress of reintroducing food can lead to cardiac arrhythmia, liver dysfunction, and neurological problems. Medical supervision is absolutely essential for anyone who has been without food for more than five days to ensure a slow, gradual reintroduction of nutrients.

Conclusion

A hunger strike is a profound and dangerous form of protest that weaponizes the body itself. The physiological journey from glucose dependency to the breakdown of vital organs is a countdown to potentially irreversible damage and, ultimately, death. While the human body is remarkably resilient and adaptive, the long-term consequences of such extreme deprivation are severe. The process affects every major system, from the cardiovascular to the neurological, and even the recovery process requires meticulous medical care. Understanding what happens to your body when you go on a hunger strike reveals the immense physical cost of this act of resistance. For more information on the medical ethics and management of hunger strikes, you can refer to academic journals and medical guidelines, such as those that have discussed the topic in clinical practice.


Disclaimer: This article is for informational purposes only and does not constitute medical advice. A hunger strike is an extremely dangerous act. Anyone considering this path should seek immediate medical and psychological assistance.

Frequently Asked Questions

Survival time varies greatly depending on the individual's health, body fat percentage, and whether they are consuming fluids. Some sources suggest a healthy individual can survive between 55 to 75 days, but significant health risks begin much earlier, with death possible after just 40 days.

Ketosis is the metabolic state the body enters after it has used up its carbohydrate (glycogen) stores. During ketosis, the liver converts body fat into ketones, which serve as an alternative energy source for the brain and other tissues.

Refeeding syndrome is a potentially deadly shift in fluids and electrolytes that can occur when a severely malnourished person begins to eat or is fed intravenously. It can cause heart failure, respiratory failure, and other severe complications.

The first symptoms typically involve intense hunger pangs and weakness during the first 2-3 days as the body's stored glucose is used up. After this, the hunger may subside, replaced by fatigue and dizziness.

Yes, a prolonged hunger strike can lead to permanent damage to various organ systems, including the brain, heart, kidneys, and liver. Neurological damage resulting in vision or hearing loss can also be permanent.

Medical supervision is vital, especially when ending a hunger strike of more than five days. Healthcare professionals must carefully and gradually reintroduce nutrients to prevent the life-threatening complications of refeeding syndrome.

Beyond physical symptoms, a hunger strike has a significant psychological impact. Individuals may experience mood swings, heightened irritability, apathy, depression, and severe mental lethargy as starvation progresses.

References

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.