September 29, 2026
Centenarians almost never die of "old age" in the abstract.
When the oldest people are autopsied, doctors find specific failures: most often the heart and blood vessels, then the lungs, and, in people past 110, a protein buildup called transthyretin amyloidosis.
Each of these is a concrete biological problem, and concrete problems can, in principle, be worked on.
Key facts
- The oldest verified human, Jeanne Calment of France, died in 1997 at 122 years and 164 days. Nobody has passed her since.
- In a Vienna autopsy study of 40 centenarians, every one died of an identifiable disease. Cardiovascular causes led, followed by respiratory illness.
- In the few supercentenarians (110+) who have been autopsied, transthyretin (TTR) amyloid deposits in the heart and blood vessels are a recurring finding.
- At the far end of life, the blood-forming system can shrink to just a handful of stem cell lineages.
Do centenarians really die of old age?
"Natural causes" and "old age" are what death certificates say when nobody looks closely.
When pathologists do look, they find a cause.
The clearest evidence comes from Austrian pathologist Andrea Berzlanovich and colleagues, who published autopsy results on 40 centenarians in 2005.
Their title asked whether centenarians die healthy. The answer was no. Although many had been described as healthy shortly before death, all 40 died of a specific disease.
Heart and blood vessel failure was the most common cause. Pneumonia and other respiratory illness came next.
That finding matters. It means the end of a very long life is not a mysterious fading.
It is the same organ failures that kill younger people, arriving in bodies that have far less reserve to survive them.
What kills supercentenarians over 110?
People who reach 110 are rare, and autopsies of them are rarer still.
The small number that exist point to a different pattern.
In 2012, L. Stephen Coles and Robert Young of the Gerontology Research Group reviewed supercentenarian autopsies.
Their paper in Preventive Medicine argued that transthyretin amyloidosis may be the leading cause of death at these ages. They called it the next frontier of human life extension.
Transthyretin is a normal blood protein that carries thyroid hormone and vitamin A.
With age, it can misfold and pile up as amyloid fibers, especially in the heart and blood vessel walls.
The heart stiffens. Blood vessels become fragile. Eventually the heart fails. This "wild-type" form of the disease becomes more common every decade after 70, and it may be close to universal in the very oldest people.
In other words, even people with exceptional genes, who dodge heart attacks, cancer and dementia for over a century, may eventually hit a wall made of one misfolded protein.
What else runs out at the end of life?
Blood stem cells. Hendrikje van Andel-Schipper died in 2005 at 115, mentally sharp to the end. She donated her body to science.
In 2014, Henne Holstege and colleagues published an analysis in Genome Research showing that most of her white blood cells came from just two stem cell clones.
Her blood stem cell pool had nearly run out.
Their telomeres were also very short. The researchers suggested stem cell exhaustion may set a limit on human lifespan.
The immune system. The thymus, where T cells mature, shrinks steadily from young adulthood.
By extreme old age, the immune system responds weakly to new infections.
That helps explain why pneumonia appears so often on centenarian death records.
Physiological reserve. Muscle mass, kidney function and lung capacity all decline.
A centenarian can function well day to day but has little margin. A fall, a flu or a fractured hip can cascade quickly.
Is 122 a hard limit?
Scientists disagree. A 2016 Nature paper by Xiao Dong, Brandon Milholland and Jan Vijg argued that human lifespan has a natural ceiling around 115, with rare outliers. Other researchers challenged the statistics.
In 2018, Elisabetta Barbi and colleagues studied thousands of Italians aged 105 and older in Science.
They found that the risk of death appears to level off after 105, at roughly 50% per year.
If true, there is no fixed wall, just very steep odds. Critics have questioned data quality in extreme age records, so the debate continues.
The practical takeaway: the record of 122 is not obviously a biological constant. It may reflect how rarely one person dodges every failure mode at once.
How might we push past 122?
If the oldest humans die of specific causes, then extending the maximum means addressing those causes. Several research directions map directly onto what autopsies show.
None of these is a solved problem. But together they turn "why we die" from a philosophical question into an engineering list.
What this means for the rest of us
Most people will never face the limits that stop supercentenarians.
They will face the earlier versions of the same processes: arteries that stiffen, mitochondria that decline, immune systems that weaken, and stress defenses that fade.
That is the lens we use at SciRouter.
The goal is not to promise 122. It is to support the systems that tend to fail first, with the best evidence available.
For how that thinking shaped a daily routine, read My Longevity Stack. For an honest scorecard of which supplements have human evidence, read Longevity Supplements That Actually Have Human Data.
FAQ
What is the most common cause of death in centenarians? Cardiovascular disease, including heart failure, is the most common cause in autopsy studies. Respiratory infections such as pneumonia come next.
Can a person die of old age? Not in medical terms. When centenarians are autopsied, pathologists find a specific cause of death, even in people who seemed healthy shortly before.
What is transthyretin amyloidosis? It is a buildup of misfolded transthyretin protein, mainly in the heart and blood vessels. The wild-type form becomes more common with age and is frequently found in supercentenarians.
Who was the oldest person ever? Jeanne Calment of France, who died in 1997 at 122 years and 164 days. She remains the oldest verified human.
Is there a maximum human lifespan? Researchers disagree. Some argue for a natural ceiling near 115. Others find that the risk of death levels off after 105, which would mean no fixed limit.
Published by the SciRouter Editorial Team for general educational purposes. Last updated September 2026.
Educational disclaimer. This article is for educational and informational purposes only and is not medical advice. It summarizes published scientific research and does not endorse any specific product, supplement, drug, or treatment. These statements have not been evaluated by the Food and Drug Administration, and any products mentioned are not intended to diagnose, treat, cure, or prevent any disease. Always consult a licensed physician before starting, stopping, or changing any supplement or medication, especially if you are pregnant, nursing, have a medical condition, or take prescription medication.
