Milly Gaines
A poor diet is the leading risk factor for deaths from lifestyle-related diseases worldwide, with about 11 million deaths per year linked to diets high in sugar, salt, and processed meat, and low in whole grains, nuts, seeds, fruits, and vegetables. Fad diets that severely restrict calories can be deadly and are not sustainable in the long run. Very low-calorie diets (VLCD) are only recommended for adults with obesity who need to lose weight for health reasons, and only under medical supervision. While starvation may eventually become fatal, it is difficult to determine how long a person can survive without food, as it depends on factors such as age and health.
Characteristics of 'Will my diet make me die faster'
| Characteristics | Values |
|---|---|
| Starvation | Fatal in the long term |
| Malnourishment | Requires medical treatment |
| Refeeding syndrome | A risk after starvation |
| Dehydration | Speeds up the dying process |
| Low-calorie diets | Linked to depression |
| Very low-calorie diets | Can be deadly |
| Healthy diet, exercise, and adequate hydration | Linked to a higher chance of a tragic death |
| Age | Plays a role in the time taken to die of starvation |
| Health | Plays a role in the time taken to die of starvation |
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What You'll Learn
Dehydration speeds up the dying process
The human body is resilient and can function for days or weeks without proper food and water. However, dehydration speeds up the dying process, and death can occur within a few days to several weeks, depending on age, health, and nutritional status. Dying from dehydration is generally not uncomfortable once the initial feelings of thirst subside.
In extreme cases, individuals have survived without water for extended periods. For example, Mauro Prosperi, an Italian athlete, survived ten days in the Sahara desert without a support team or supplies by storing and drinking his urine, which has the highest water content.
While the body can withstand short periods of dehydration, it is crucial to maintain proper hydration for optimal health. Dehydration can lead to serious health issues and even death if prolonged.
Additionally, it is important to note that palliative sedation, a legal end-of-life option, involves stopping all nutrition and hydration, resulting in death within a few days. This option requires intensive monitoring and is not always authorized by physicians or hospices.
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Voluntarily Stopping Eating and Drinking (VSED)
The process can be uncomfortable, and symptoms such as agitation, thirst, or psychological distress may arise. Mild sedatives, mouth swabs, lip balm, cool water rinses, and artificial saliva or oral sprays can help alleviate discomfort. It is also important to note that drinking any liquids will slow the process and make it more uncomfortable.
The length of time it takes to die from VSED varies from a few days to several weeks, depending on age, health, and nutritional status. It is a natural process, and the body's need for food and drinks declines as it prepares to die.
If you are considering VSED, it is important to discuss your plans with your physician, complete an advance directive, and finalise your business and financial affairs, funeral plans, and goodbyes. It is also crucial to be prepared for the possibility that some friends or family members may not support your decision.
VSED is an end-of-life option that provides an alternative to palliative sedation, which requires medical authorisation and involves keeping patients continuously unconscious until death.
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Low-calorie diets and sudden cardiac death
Starvation and malnourishment can have long-term health effects and can eventually become fatal. While the human body can function for days or weeks without proper food and water, the length of time varies depending on factors such as age, health, and access to fluids. Dehydration, for instance, can speed up the dying process.
In the 1970s, severely calorie-restricted diets became a popular means of losing weight. However, in 1978, a Food and Drug Administration investigation of 800,000 patients adhering to liquid protein very low-calorie diets (VLCDs) reported 46 deaths. This led to a decline in the popularity of 'crash' dieting, which was now seen as dangerous.
VLCDs have since seen a resurgence due to rising obesity and type II diabetes rates. While they can lead to rapid improvements in insulin resistance and hepatic steatosis, they are also associated with an early and significant deterioration in cardiac function, metabolism, and aortic elasticity. This deterioration is transient, and with a full 8-week programme, improvements in cardiovascular function become evident.
However, studies have shown that very low-calorie diets can lead to sudden cardiac death. One study examined 17 individuals who died suddenly of ventricular arrhythmia after prolonged use (median of 5 months) of very low-calorie diets consisting mostly of protein. The common factors among these individuals were marked obesity, prolonged use of extremely low-calorie diets (approximately 300 to 400 kcal daily), and significant and rapid weight loss. The deaths appeared to be independent of the type of medical supervision, daily dosage of potassium supplementation, and biological quality of the protein product.
Therefore, while VLCDs may be effective in treating obesity-related heart disease, they should be approached with caution until further studies can determine ways to ensure their safety.
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The impact of age on diet and lifespan
While starvation is a natural way to die, it is not known exactly how long a person can live without eating. The body can function for days or weeks without proper food and water, but there are risks. People who have experienced starvation may suffer long-term health effects, and starvation eventually becomes fatal.
Age influences dietary choices and nutritional needs. Older adults generally have lower calorie needs but similar or increased nutrient needs compared to younger adults. This is often due to less physical activity, changes in metabolism, or age-related loss of bone and muscle mass. Lower food intake among the elderly has been associated with lower intakes of calcium, iron, zinc, B vitamins, and vitamin E. Older adults are also more susceptible to foodborne illnesses due to a decline in immune system function.
Physiological changes associated with age, such as slower gastric emptying, altered hormonal responses, decreased basal metabolic rate, and altered taste and smell, may contribute to lower energy intake. Older adults tend to consume less energy-dense sweets and fast food and more energy-dilute grains, vegetables, and fruits.
Adopting a healthy diet and lifestyle can potentially add approximately 8 to 10 years of disease-free life expectancy. A healthy diet can help promote mental well-being and mitigate age-related cognitive decline, reducing the risk of dementia and enhancing the overall quality of life. Maintaining a healthy weight throughout life is pivotal for healthy aging and longevity.
To support healthy aging, older adults should focus on eating nutrient-dense foods and maintaining an active lifestyle. It is important to eat enough protein to prevent the loss of lean muscle mass and ensure adequate intake of vitamins and minerals. Good dental health is critical to the ability to chew foods, and health professionals can provide guidance on dietary supplements if needed. Social support from friends and family can also help older adults improve their dietary patterns.
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The impact of diet on mental health
While it is not possible to determine exactly how long a person can live without food, there are records of people surviving without food or drink between 8 and 21 days. However, starvation eventually becomes fatal.
Now, let's delve into the impact of diet on mental health:
The connection between nutrition and mental health is bidirectional. The foods we consume can influence our mental health, and our mental health can also impact our dietary choices. A healthy diet that includes a variety of fruits, vegetables, whole grains, nuts, and seeds provides essential vitamins, minerals, healthy fats, and fiber. This nutritional adequacy helps to reduce inflammation and supports optimal brain function, thereby reducing symptoms of depression and improving overall mental well-being.
The gastrointestinal tract, lined with neurons, produces serotonin, a neurotransmitter that plays a crucial role in guiding emotions. The production of serotonin and other neurotransmitters is influenced by the intestinal microbiome, which consists of billions of "good" bacteria. These bacteria protect the intestinal lining, improve nutrient absorption, and activate neural pathways between the gut and the brain.
Fermented foods, a part of traditional diets, are probiotic in nature, positively influencing health by providing beneficial microorganisms. Prebiotics, on the other hand, contain non-digestible fiber that stimulates the growth of these microorganisms. Short-term dietary changes can induce species-level changes to intestinal microbes, highlighting the link between dietary patterns and mental health.
Additionally, dietary patterns can influence mental health through nutrient intake. Adequate consumption of specific nutrients, such as antioxidants, omega-3 fatty acids, folate, vitamin D, and magnesium, found in various plant-based and animal-based foods, is associated with improved mental well-being.
It is important to note that individual responses to specific diets may vary. Some individuals may benefit from a clean diet that eliminates processed foods and sugar, while others may find that certain diets enhance inflammation and negatively impact their emotional state. Thus, paying attention to how different foods make one feel is essential.
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Frequently asked questions
Poor diet is the leading risk factor for deaths from lifestyle-related diseases around the world. About 11 million deaths a year are linked to diets high in sugar, salt, and processed meat, and low in whole grains, nuts, seeds, fruits, and vegetables. Obesity increases the risk of illness and death due to diabetes, stroke, coronary heart disease, kidney and gallbladder disorders, and cancer.
Very low-calorie diets can be deadly. Doctors consider losing anything more than 2 pounds a week to be rapid weight loss. Most experts recommend not exceeding 12 weeks on a very low-calorie diet, and never attempting one without medical supervision.
Fasting for religious or health reasons is usually safe for adults without health conditions. However, the body can only function for days or weeks without proper food and water, and there are risks. People who have experienced starvation may have long-term health effects, and starvation eventually becomes fatal.
Palliative sedation is an ethical and legal end-of-life option for patients with terminal illnesses. It involves administering enough medication to keep patients comfortable and continuously unconscious, free of pain and other symptoms. All nutrition and hydration are stopped, and patients usually die within a few days.
