Summary in Seconds:
Scientists have identified what may be the ultimate biological limit to human lifespan. A new study suggests that even if every reversible aspect of aging and all age-related diseases could be eliminated, the relentless buildup of random DNA mutations in our cells would still cap the median human lifespan at about 146 to 194 years. The greatest limitation comes from long-lived, non-renewing cells in the brain and heart, which gradually accumulate irreversible genetic damage. While somatic DNA mutations appear to be a major driver of aging, the researchers found they account for only about half of the gap between a hypothetical non-aging lifespan and real human longevity, indicating that other aging mechanisms also play equally important roles. The study offers a new framework for understanding aging and points toward regenerative therapies targeting the brain and heart as a possible path to extending healthy human life.
When the iconic rock band Queen [1] asked, “Who wants to live forever?” the question was rhetorical. But for many people, the answer has always been a resounding “Yes.”
Unfortunately, a new scientific study suggests that true immortality may remain forever beyond our reach—even if humanity eventually develops the perfect anti-aging treatment.
Researchers led by computational biologist [2] Dmitrii Kriukov [3] at the Skolkovo Institute of Science and Technology in Russia [4] asked a fascinating question: If scientists could eliminate every reversible aspect of aging, how long could humans actually live?
Their findings, published in npj Aging [5], suggest that one unavoidable obstacle would still stand in the way: the gradual accumulation of random genetic errors, known as somatic DNA mutations [6], within the cells of our bodies.
As we grow older, our risk of diseases such as cancer, heart disease, and dementia rises dramatically. But aging is far more than the development of disease. Throughout life, every time a cell divides, tiny copying mistakes can occur in its DNA. Although our cells possess remarkable repair systems that correct most of these errors, they are not perfect. Over the decades, thesesomatic mutations steadily accumulate. Most are harmless, while a small number can contribute to diseases such as cancer.
The researchers wondered whether these mutations alone could eventually place an absolute limit on human lifespan, even if every other hallmark of aging could somehow be eliminated.
To investigate this possibility, the team developed a sophisticated mathematical model [7] that isolated the effects of somatic DNA mutations from all other biological processes involved in aging. Rather than predicting how long people will live in the future, the model was designed as a thought experiment to estimate the upper lifespan limit imposed by these mutations alone.
The results were striking.
In a purely hypothetical world where no aging processes existed, the model estimated that the median human lifespan could theoretically reach about 1,759 years. However, once the unavoidable accumulation of somatic DNA mutations was added to the equation, the median lifespan dropped dramatically to about 156 years. When the researchers incorporated the complex interactions among the body’s major organs, the estimated median lifespan ranged from 146 to 194 years—roughly twice today’s average human longevity of about 79 years in countries with favorable living conditions.
Even under this extraordinarily optimistic scenario, however, immortality remained impossible. A few exceptional individuals might theoretically exceed those ages, but no one would live forever.
“This is a mathematical estimate (though careful), not experimental data,” Kriukov emphasized.
He also noted that these lifespan estimates are “not a verdict of inevitability,” but they do demonstrate that somatic mutations, while relatively modest as an isolated driver of aging, become increasingly important when combined with the many other biological processes that gradually wear down the body.
One of the study’s most intriguing discoveries is that not all organs age equally.
Many tissues, including the skin and liver, continually replace old or damaged cells with new ones. This constant renewal allows these organs to eliminate many mutation-bearing cells, enabling them to remain functional for extraordinarily long periods. According to the model, self-renewing organs such as the liver could theoretically maintain their function for thousands of years if somatic mutations were the only aging process involved.
The brain and heart tell a very different story.
Most neurons in the brain and cardiomyocytes in the heart rarely divide after birth. Because these long-lived cells cannot easily be replaced, they gradually accumulate genetic damage over a lifetime. As mutations continue to build up, these irreplaceable cells become the primary bottleneck limiting human longevity. In other words, even if every other tissue in the body remained healthy, the gradual decline of these critical organs would ultimately determine how long we can live.
The research also sheds new light on one of biology’s longest-running debates.
For decades, scientists have argued over whether the accumulation of DNA mutations is the fundamental cause of aging—a concept known as the somatic mutation theory of aging [8]. Previous studies clearly demonstrated that mutations accumulate throughout life, but whether they alone could explain aging remained uncertain.
Kriukov’s work suggests the answer is no.
Although somatic mutations substantially shorten the theoretical lifespan from 1,759 years to around 156 years, they explain only about half of the enormous gap between a hypothetical non-aging human and the much shorter lifespans observed in the real world. This strongly suggests that other biological mechanisms—including mitochondrial dysfunction [9], epigenetic changes [10], and several additional hallmarks of aging—make equally important contributions to the aging process.
These findings reinforce an increasingly accepted view among scientists: aging is not caused by a single mechanism but results from the combined effects of many interacting biological processes. Understanding the relative contribution of each process may ultimately reveal which ones should be targeted first to slow aging and extend healthy lifespan.
The study therefore offers more than just an estimate of humanity’s maximum lifespan. It introduces a new mathematical framework that allows researchers to measure the contribution of different aging mechanisms individually, providing a valuable tool for future aging research.
The findings also highlight both the promise and the challenge of dramatically extending human life. Preventing DNA mutations alone is unlikely to be sufficient. Reaching lifespans beyond 150 years would probably require therapies capable of repairing or replacing cells in critical non-renewing organs—particularly the brain and heart. Advanced regenerative medicine [11], including stem-cell therapies [12], neuronal replacement [13], and other forms of applied cell therapy [14], may eventually become essential if humans are ever to approach the remarkable lifespan limits suggested by this research.
The researchers emphasize that their study represents only one piece of a much larger puzzle. Building a comprehensive understanding of aging will require integrating many biological mechanisms into a unified model, a task that will demand collaboration across multiple scientific disciplines.
As they conclude, “Our work provides a critical first step towards dissecting aging into quantifiable mechanistic components.”
Ultimately, by combining knowledge about somatic mutations with the many other hallmarks of aging, scientists may move closer to developing a comprehensive, mechanistic theory of aging—one that could reshape humanity’s quest for longer, healthier lives.
Notes
- Queen (British Rock Band)
Queen is a famous British rock band formed in London in 1970 and is widely regarded as one of the most influential bands in music history. The band is best known for hit songs such as Bohemian Rhapsody, We Will Rock You, and We Are the Champions, with Freddie Mercury serving as its legendary lead singer. - Computational Biology
Computational biology is a scientific field that combines biology, computer science, mathematics, and statistics to analyze complex biological data. It is used to study genes, proteins, disease development, and biological processes through computer-based models and simulations. - Dmitry Kryukov
Dmitry Kryukov is a scientist and researcher specializing in computational biology and mathematical modeling. He has contributed to research on aging and the biological limits of the human lifespan by using mathematical models to study how molecular changes accumulate in cells over time. - Skolkovo Institute of Science and Technology (Skoltech)
The Skolkovo Institute of Science and Technology (Skoltech) is an advanced Russian university and research institution located near Moscow. Founded in 2011 in collaboration with the Massachusetts Institute of Technology (MIT), it focuses on biotechnology, artificial intelligence, energy, medicine, and engineering. - Aging Research Journal
Aging Research Journal is a scientific journal dedicated to publishing research on the causes and biological mechanisms of aging, the prevention of age-related diseases, and strategies for extending healthy lifespan. Articles published in the journal typically undergo peer review by experts in the field. - Somatic DNA Mutations
Somatic DNA mutations are genetic changes that occur in the DNA of body cells after birth. Because they do not affect reproductive cells, they cannot be passed on to offspring. These mutations accumulate with age and may contribute to aging, cancer, and other diseases. - An Advanced Mathematical Model
An advanced mathematical model is a framework that uses mathematical equations, statistics, and computer simulations to represent and predict the behavior of complex systems. In aging research, such models are used to estimate how the accumulation of mutations and cellular changes influences human lifespan. - Somatic Mutation Theory of Aging
The Somatic Mutation Theory of Aging proposes that aging results, at least in part, from the gradual accumulation of mutations in the DNA of body cells. As these mutations increase over time, cellular and tissue function declines, leading to the physical signs of aging and a higher risk of disease. - Mitochondrial Dysfunction
Mitochondrial dysfunction refers to the impaired ability of mitochondria—the “powerhouses” of the cell—to produce energy efficiently. This dysfunction is associated with aging and many diseases because it reduces cellular performance and increases oxidative stress. - Epigenetic Changes
Epigenetic changes are modifications that influence whether genes are turned on or off without altering the underlying DNA sequence. These changes can be affected by aging, lifestyle, and environmental factors and play an important role in aging and the development of disease. - Advanced Regenerative Medicine
Advanced regenerative medicine is a branch of medicine that aims to repair, replace, or regenerate damaged tissues and organs using advanced technologies such as stem cells, tissue engineering, and gene therapy. It is considered one of the most promising fields for treating chronic diseases and severe injuries. - Stem Cell Therapies
Stem cell therapies are treatments that use stem cells to repair or replace damaged cells and tissues. They have proven effective for certain medical conditions, while many other applications are still being investigated through laboratory research and clinical trials. - Neuronal Replacement
Neuronal replacement is a therapeutic approach that aims to replace nerve cells lost due to injury or neurodegenerative diseases, such as Parkinson’s disease. This is typically achieved through stem cell technology or other regenerative medicine techniques to restore neurological function. - Applied Cell Therapy
Applied cell therapy is the use of living cells as a direct treatment to repair damaged tissues, enhance immune function, or treat various diseases. It includes therapies based on stem cells and engineered immune cells and represents an important branch of regenerative and precision medicine.
References
1. Starr, Michelle. “Ultimate limit of the human lifespan may be identified, study suggests.” Science Allert, July 22, 2026.
2. AI Overview. “Dmitrii Kriukov and his team estimated the ultimate upper bound of human lifespan.” Google Search, July 23, 2026
3. Efimov, Evgeniy; Fedotov, Vlad; Malaev, Leonid; Khrameeva, E. Ekaterina; and Kriukov, Dmitrii. “Somatic mutations impose an entropic upper bound on human lifespan.” npj Aging, June 25, 2026.