Inflammaging: Chronic Inflammation and Aging

Inflammaging is the gradual accumulation of low-grade, chronic systemic inflammation that occurs as the body ages, a process now recognized as one of the 12 hallmarks of aging and a leading contributor to three out of five deaths worldwide. Unlike the acute inflammation that resolves after injury or infection, inflammaging is persistent, largely asymptomatic, and operates silently for years before its effects become clinically visible. Understanding it is the first step toward measuring and modifying it.

To understand how chronic inflammation silently accelerates aging, read our guide Chronic Inflammation & Inflammaging: The Hidden Driver of How You Age.

What exactly is inflammaging, and how is it different from regular inflammation?

Inflammaging is a specific form of chronic, low-grade systemic inflammation that accumulates with age, distinct from the acute inflammation the immune system uses to fight infection or heal injury. Acute inflammation is a targeted, time-limited defense response. Inflammaging, by contrast, involves the persistent elevation of inflammatory cytokines, chemokines, and acute-phase proteins without any infectious trigger, which is a state sometimes called "sterile inflammation" because it can be initiated by damage-associated molecular patterns such as excess glucose, cholesterol crystals, and cellular debris rather than bacteria or viruses.

This low-grade activation gradually damages tissues and organs, increasing the risk of physical frailty and driving higher morbidity and mortality rates. The practical implication is that inflammaging cannot be resolved the way an infection can, it instead requires a sustained lifestyle and, in some cases, medical intervention to shift.

Why is chronic low-grade inflammation so dangerous for long-term health?

Chronic low-grade inflammation accelerates biological aging and is directly linked to cardiovascular disease, neurodegenerative disorders, insulin resistance, and type 2 diabetes. Three out of every five deaths globally are tied to chronic inflammatory diseases.

"Inflammation is the new currency of medicine. In the 90s it was all about cardiac health. The 2000s brought metabolic health. Now we have moved into an era where it is about inflammation — how your inflammatory pathways are activated, your resting baseline levels of inflammation, and how inflammation can affect all your systems and organs."

— Dr. E, Founder, HUM2N; Functional & Integrative Medicine Practitioner

What makes inflammaging particularly dangerous is its asymptomatic nature: it accumulates quietly over years and decades, creating a hostile biological environment long before symptoms or clinical diagnoses appear.

The mechanism involves multiple reinforcing pathways — mitochondrial dysfunction increases oxidative stress, impaired autophagy means the body cannot clear damaged cellular material, and both feed back into elevated inflammation. Chronic inflammation is also interconnected with other hallmarks of aging, meaning it does not operate in isolation but amplifies the biological deterioration driven by cellular senescence, epigenetic dysregulation, and other aging processes.

What causes inflammaging and is it just a natural part of getting older?

Age is the primary driver of inflammaging, but it is far from the only one. Systemic chronic inflammation is also driven by chronic infections, microbiome dysbiosis, and a cluster of modifiable behavioral factors: smoking, physical inactivity, poor diet, high adiposity, disturbed sleep, social isolation, and psychological stress. Environmental and industrial toxicant exposure contributes as well, and research is increasingly examining how early-life influences and childhood trauma can shape chronic inflammatory profiles in adulthood.

"Short bursts of inflammation are extremely important — they eliminate pathogens. But when this becomes a long-term chronic state, there are so many microscopic or molecular scars made by inflammation. What happens with age is we become more and more pro-inflammatory, and through years or even decades of this low-grade chronic inflammatory process, the problems we identify as disease develop."

— Prof. Gordan Lauc, Chief Scientific Officer, GlycanAge; Professor of Biochemistry and Molecular Biology, University of Zagreb

Visceral and ectopic fat are a particularly well-characterized driver: adipose tissue secretes pro-inflammatory molecules including interleukin-6 and TNF-alpha, and as fat cells increase in size and number, some become hypoxic, generating oxidative stress that further perpetuates the inflammatory cycle. The important takeaway is that while aging is inevitable, the pace and severity of inflammaging is substantially modifiable through the choices made daily around diet, exercise, sleep, and stress.

How does inflammaging relate to biological age and why does it matter more than chronological age?

Biological age measures how fast the immune system and underlying cellular machinery are actually aging, as distinct from the number of years a person has lived. Inflammaging is one of the central mechanisms through which biological age diverges from chronological age: two people born in the same year can have dramatically different inflammatory profiles, and the one with higher chronic inflammation will typically show accelerated biological aging and greater disease risk.

Elevated inflammatory markers predict higher mortality risk, making inflammaging not just a marker of how someone feels today but a signal of future health trajectory. This is why measuring biological age through an inflammaging-sensitive biomarker provides information that a birthday cannot. It captures the cumulative biological cost of lifestyle, stress, hormonal shifts, and medical history.

Why is chronic inflammation so difficult to measure accurately?

Chronic inflammation is notoriously difficult to measure because most existing biomarkers are designed to capture acute inflammation, not the persistent low-grade activation that defines inflammaging. Traditional markers such as C-reactive protein (CRP) and other inflammatory cytokines are short-lived molecules that reflect the acute inflammatory response. They fluctuate hourly and daily in response to transient events like a poor night's sleep, a hard workout, or a minor infection. This makes them useful for detecting active infection or acute injury, but poorly suited to tracking the slow, chronic inflammatory signal that accumulates over months and years.

Chronic inflammation can persist for weeks, years, or even decades without triggering the kind of acute-phase response these markers are calibrated to detect. The result is a significant measurement gap: standard blood panels can appear normal while inflammaging continues to drive biological aging beneath the surface.

How does GlycanAge measure inflammaging differently from standard blood tests?

GlycanAge measures inflammaging through IgG glycosylation, which is the pattern of complex sugars (glycans) attached to Immunoglobulin G (IgG), the most abundant antibody in human blood. Glycans are molecular structures present on every cell surface and the majority of proteins in the body; they regulate how cells and proteins communicate, and specific glycan configurations either activate or suppress inflammatory pathways.

"Glycans on IgG are not only biomarkers that tell you what is going on — they are functional effectors that contribute to the progression of low-grade chronic inflammation. We know that in many inflammatory diseases, IgG glycans change up to a decade before people are diagnosed. These molecular changes happen very early, and with time, this becomes disease."

— Prof. Gordan Lauc, Chief Scientific Officer, GlycanAge

The overall profile of IgG glycans in a person, called the IgG glycome, reflects the level of chronic inflammation inside their body, and it changes in a predictable, measurable pattern as biological age increases. Because IgG has a half-life of approximately three weeks, GlycanAge captures a rolling average of the inflammatory environment rather than a snapshot of a single moment. This makes it far more precise for evaluating chronic inflammation than short-lived markers like CRP, and it means meaningful changes in the inflammatory landscape, driven by lifestyle or medical interventions, become detectable within months rather than years.

Can inflammaging actually be reversed, or only slowed down?

The biology of inflammaging is modifiable: daily choices around diet, exercise, sleep, and stress management directly influence chronic inflammation levels, and medical interventions can shift the inflammatory profile measurably. GlycanAge captures this evolving inflammatory landscape, offering insight into the effectiveness of those interventions. Overexercising without adequate recovery, for example, can increase low-grade systemic inflammation and raise a person's biological age score, demonstrating that the relationship between behavior and inflammaging runs in both directions.

The practical implication is that inflammaging is not a fixed trajectory. While aging itself cannot be stopped, the rate at which chronic inflammation accumulates is responsive to intervention, and that response is measurable at the molecular level through IgG glycan analysis.

How often should I retest to track whether my interventions are reducing inflammaging?

Because IgG has a half-life of approximately three weeks, the glycan profile is sensitive to biological change over time. For those undergoing medical interventions, such as hormone therapy, targeted metabolic treatments, or biologics, meaningful shifts can become detectable within three to four months, making an early retest clinically informative.

For lifestyle-based changes such as dietary overhauls, exercise protocols, or stress-reduction programmes, glycan shifts occur more gradually; six months is a practical minimum, with twelve months recommended for tracking long-term trends.

If you are ready to measure your own inflammaging and find out where chronic inflammation is driving your biological age, the GlycanAge at-home test kit ships to 65+ countries and includes a 1:1 Result Interpretation Call with a longevity specialist who will walk you through your results and a personalized action plan.

Measure your biological age — order your GlycanAge test kit

External Sources

• https://pubmed.ncbi.nlm.nih.gov/10911963/ — Franceschi C, Bonafè M, Valensin S, Olivieri F, De Luca M, Ottaviani E, De Benedictis G. Inflamm-aging: an evolutionary perspective on immunosenescence. Ann N Y Acad Sci. 2000;908:244–254.

• https://pubmed.ncbi.nlm.nih.gov/22353383/ — Dall'Olio F, Vanhooren V, Chen CC, Slagboom PE, Wuhrer M, Franceschi C. N-glycomic biomarkers of biological aging and longevity: a link with inflammaging. Ageing Res Rev. 2013;12(2):685–698.

• https://pubmed.ncbi.nlm.nih.gov/28045402/ — Saltiel AR, Olefsky JM. Inflammatory mechanisms linking obesity and metabolic disease. J Clin Invest. 2017;127(1):1–4.

• https://pubmed.ncbi.nlm.nih.gov/28668296/ — Lemmers RFH, Vilaj M, Urda D, et al. IgG glycan patterns are associated with type 2 diabetes in independent European populations. Biochim Biophys Acta Gen Subj. 2017;1861(9):2240–2249