Does chronic inflammation accelerate the ageing of your cells?
Chronic inflammation demonstrably accelerates cellular ageing through a negative spiral that is difficult to break. The best evidence-based approach to tackling that spiral is through lifestyle factors that dampen low-grade inflammation, such as sufficient exercise and a diet low in ultra-processed products.
Chronic low-grade inflammation does indeed accelerate cellular ageing, and it does so through a self-reinforcing cycle. Cells that have been damaged stop dividing but do not die: they become 'senescent' (aged) and secrete a package of inflammatory substances. Those substances in turn cause surrounding healthy cells to age rapidly, while at the same time weakening the immune system so that the senescent cells are cleared away less effectively. The more senescent cells accumulate, the more inflammation there is, and the more inflammation there is, the faster cells age.
The consequences extend beyond cell biology. In joints, those inflammatory substances contribute to joint destruction, which neatly explains why osteoarthritis is a disease of old age. In the skin, senescent connective-tissue cells accumulate and break down collagen, leading to wrinkles and thinner skin. There is also a link with the brain and with type 2 diabetes, but the precise contribution of cellular ageing to each condition has not yet been established equally precisely for every disease.
Cellular ageing is, incidentally, not purely negative. It is also a built-in protective mechanism: by stopping dividing, a damaged cell prevents itself from growing into a cancerous tumour. It is only when senescent cells accumulate en masse and continue to secrete inflammatory substances over a prolonged period that this protective mechanism turns into something harmful. That makes intervening in this system, for example with so-called senolytic agents that clear away senescent cells, a much-discussed but complex challenge.
One potential point of intervention is a protective system within cells that counteracts oxidative stress and dampens inflammatory processes. This system weakens with age, which accelerates the vicious cycle. Activating it reduced the number of senescent cells and their associated inflammatory substances in laboratory studies. Whether this also works clinically in humans has not yet been sufficiently investigated. There are therefore concrete molecular targets in view, but proven therapies do not yet exist.
Based on multiple review studies and mechanistic research (PMID 37291105, 23140366, 27192932, 33358020, 38040661, 39380993, 38744316). The cycle of inflammation and cellular ageing is well documented; the causal weight for each specific disease varies.
What is the role of inflammation in cellular ageing?
Inflammation and cellular senescence reinforce each other in two vicious cycles, leading to tissue damage and age-related diseases. Both protecting your cells against oxidative damage (think sun protection and lifestyle) and future targeted therapies aim to break this cycle.
Does dehydration make your cells age faster?
There are biologically plausible indications that dehydration harms cells, but whether simply not drinking enough accelerates ageing in healthy people has not yet been demonstrated. Drinking enough remains sensible, though it cannot yet be marketed as an anti-ageing tip.
Why do damaged proteins accumulate in your cells as you age?
As you age, several systems that clear away damaged proteins weaken simultaneously and amplify each other's failure. This is one of the central mechanisms behind age-related diseases, but how to stop it in a targeted way is still actively being researched.
Does caloric restriction actually make your cells younger?
Caloric restriction slows ageing processes in cells, but whether your cells actually become younger as a result has not yet been proven in humans. The metabolic benefits, such as improved insulin sensitivity, have been demonstrated in human studies.
What is the role of chronic inflammation in the development of cancer?
Chronic inflammation is a proven driver of cancer: it promotes every step of tumour formation and makes tumours more resistant to treatment. Controlling persistent inflammation, for example through weight management or treatment of chronic infections, is therefore a relevant strategy for lowering your cancer risk.
Does quercetin work against ageing and inflammation?
Quercetin shows promising signals in the laboratory and in animals, but in humans there is not yet solid evidence. Taking supplements on the basis of this early-stage research gets too far ahead of the science.