Help us: Donate
Follow us on:



The Hallmarks of Aging’s Original Authors Offer a Fresh View

This update was based on the last decade of research.


The year 2023 started with the publication of two remarkable review papers in Cell and Cell Metabolism by researchers addressing the hallmarks of aging and their interplay with the hallmarks of cancer [1,2]. These papers were authored by the same team that published the original 2013 Hallmarks of Aging paper [3].

Much-needed update

The original paper on the Hallmarks of Aging systematized the processes underlying aging. As such, it became a very common discussion topic in the rejuvenation world and was frequently cited in research papers related to aging. That paper determined nine hallmarks of aging under three criteria: the process is observed during normal aging, it speeds up aging if worsened, and it reverses some aspects of aging if abolished by therapeutic interventions.

Since then, several research groups have proposed the addition of other hallmarks, including five new ones suggested back in August 2022 and cellular enlargement.

The authors note that although the originally suggested hallmarks have withstood research scrutiny over the last decade, their original paper has required an update that integrates recently obtained knowledge, particularly from mammalian studies.

Therefore, their updated list of twelve hallmarks of aging includes the somewhat reorganized previous hallmarks plus three new ones: chronic inflammation, disabled macroautophagy, and dysbiosis [1]. All of these hallmarks are interconnected and interdependent.

The old and the new

The researchers initially discuss some of the already accepted and established hallmarks of aging. First, they focus on genomic instability, which includes nuclear architecture changes along with nuclear and mitochondrial DNA aberrations that accumulate with age.

The second hallmark, telomere attrition, is closely connected to genomic instability. However, it is a separate hallmark, and it has been shown to modulate aging when manipulated via telomerase activation in mammals.

The third hallmark of aging is known for its utility as a measurement of biological age: epigenetic alternations. There is a number of such aging-associated changes which ultimately lead to gene expression disbalances including histone modifications, non-coding RNAs, and reactivation of retrotransposons.

Loss of proteostasis resulting in protein misfolding and aggregation is a fourth hallmark of aging and was separated out from disabled macroautophagy. The authors consider this to be a hallmark of its own because, outside of its major role in proteostasis, autophagy ensures the proper turnover of organelles.

The authors then discuss deregulated nutrient sensing, with a special focus on diet as a practical target for anti-aging interventions. Mitochondrial dysfunction, cellular senescence, and stem cell exhaustion are all well-established hallmarks of aging which have proven to be promising targets for lifespan extension, at least in model organisms.

Altered intercellular communication is a hallmark of aging that involves several processes involved in cell-to-cell communication. It includes aging-associated damages to the extracellular matrix and pro-aging factors circulating in the blood.

Finally, the authors introduce chronic inflammation and dysbiosis (microbiome alterations) as the new meta-cellular hallmarks of aging. The former stems from all the damages and aberrations that result from the other hallmarks. The latter has been addressed by fecal microbiota transplantation, which proved beneficial in animal models.

Aging and cancer

In their second review publication [2], the researchers explored the overlap between the hallmarks of aging and cancer. They note that both phenomena share some features, which they coined “meta-hallmarks.” These include genomic instability and chronic inflammation. Meanwhile, such hallmarks of aging as telomere attrition favor oncogenesis and therefore represent “antagonistic hallmarks”.

The authors highlight a very complex relationship between aging and cancer. Although aging is the most prominent risk factor for various cancers, it is not necessarily true that targeting molecular drivers of aging is oncoprotective.

It is conceivable that by targeting the meta-hallmarks, it is possible to both delay aging and prevent cancer, while a more intricate tuning of antagonistic hallmarks is required. Regardless, experimental validation is needed to check if these assumptions are correct.


Aging is driven by hallmarks fulfilling the following three premises: (1) their age-associated manifestation, (2) the acceleration of aging by experimentally accentuating them, and (3) the opportunity to decelerate, stop, or reverse aging by therapeutic interventions on them. We propose the following twelve hallmarks of aging: genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, disabled macroautophagy, deregulated nutrient-sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, altered intercellular communication, chronic inflammation, and dysbiosis.

Both aging and cancer are characterized by a series of partially overlapping โ€œhallmarksโ€ that we subject here to a meta-analysis. Several hallmarks of aging (i.e., genomic instability, epigenetic alterations, chronic inflammation, and dysbiosis) are very similar to specific cancer hallmarks and hence constitute common โ€œmeta-hallmarks,โ€ while other features of aging (i.e., telomere attrition and stem cell exhaustion) act likely to suppress oncogenesis and hence can be viewed as preponderantly “antagonistic hallmarks.”


All the hallmarks of aging are intimately related, which means that a truly successful anti-aging intervention would target several hallmarks at once to extend lifespan. Indeed, known substances with reported anti-aging effects, such as metformin and spermidine, are multimodal. Some of these therapeutics also possess anti-cancer properties. At the same time, as highlighted by the authors, there is a certain hierarchy among the hallmarks, which may guide researchers on their path to developing anti-aging interventions.

We would like to ask you a small favor. We are a non-profit foundation, and unlike some other organizations, we have no shareholders and no products to sell you. We are committed to responsible journalism, free from commercial or political influence, that allows you to make informed decisions about your future health.

All our news and educational content is free for everyone to read, but it does mean that we rely on the help of people like you. Every contribution, no matter if itโ€™s big or small, supports independent journalism and sustains our future. You can support us by making a donation or in other ways at no cost to you.

Dietary Magnesium in Dementia Prevention

Researchers publishing in the European Journal of Nutrition looked into magnesium as a possible candidate for preventing dementia, focusing on...

Glycine and Cysteine Combo Rescues Cognitive Decline in Mice

Scientists publishing in Antioxidants have reported that increasing glutathione levels with GlyNAC, a supplement that combines glycine and cysteine, significantly...

Vitalik Buterin Exclusive Interview: Longevity, AI and More

Vitalik Buterin holding Zuzu, the puppy rescued by people of Zuzalu. Photo: Michelle Lai Donโ€™t try finding Zuzalu on a...

Centenarians Have Slightly Different Gut Ecologies

Researchers publishing in Nature Microbiology have determined that the viruses populating the intestines of centenarians are slightly different from those...


[1] Lรณpez-Otรญn, C., Blasco, M. A., Partridge, L., Serrano, M. & Kroemer, G. Hallmarks of aging: An expanding universe. Cell 0, (2023)

[2] Lรณpez-Otรญn, C., Pietrocola, F., Roiz-Valle, D., Galluzzi, L. & Kroemer, G. Meta-hallmarks of aging and cancer. Cell Metab. 35, 12โ€“35 (2023)

[3] Lรณpez-Otรญn, C., Blasco, M. A., Partridge, L., Serrano, M. & Kroemer, G. The hallmarks of aging. Cell 153, 1194โ€“1217 (2013)

About the author
Larisa Sheloukhova

Larisa Sheloukhova

Larisa is a recent graduate from Okinawa Institute of Science and Technology located in one of the blue zones. She is a neurobiologist by training, a health and longevity advocate, and a person with a rare disease. She believes that by studying hereditary diseases itโ€™s possible to understand aging better and vice versa. In addition to writing for LEAF, she continues doing research in glial biology and runs an evidence-based blog about her disease. Larisa enjoys pole fitness, belly dancing, and Okinawan pristine beaches.
No Comments
Write a comment:


Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.