Inflammaging is a complex phenomenon that describes the state of low-grade chronic inflammation typical of aging. It is not a single event, but the result of multiple factors that, accumulated over time, create fertile ground for accelerated aging and the onset of chronic diseases.

The main contributing factors include exposure to environmental and antigenic stressors, oxidative stress, accumulation of senescent cells, gut microbiota dysbiosis, high-fat diets, increased central adiposity, and physical inactivity. Together, these elements sustain a silent but persistent background inflammation that undermines cellular and systemic health.

The mechanisms behind inflammaging

Inflammatory stress and immunosenescence

As we age, the immune system is constantly exposed to inflammatory signals. Toll-like receptors (TLRs) on immune cells are persistently activated, establishing a kind of “inflammatory memory” that leads to an altered and less efficient response, known as immunosenescence.
Monocytes and other immune cells continuously release pro-inflammatory cytokines such as TNF-α, IL-1β, and IL-6, contributing to a chronic inflammation that is difficult to control. Moreover, the reduced ability of the body to eliminate molecular waste further worsens this scenario.

Senescent cells and SASP

With aging, senescent cells accumulate. These no longer divide but remain metabolically active. They secrete a set of inflammatory molecules known as the senescence-associated secretory phenotype (SASP), which amplifies the inflammatory cascade.
The accumulation of visceral fat also plays an important role, since adipose tissue is one of the main sources of inflammatory cytokines.

Gut dysbiosis

Advanced age is often associated with imbalances in the gut microbiota, including the loss of beneficial bacterial species and the growth of opportunistic microorganisms. This increases intestinal permeability: bacterial metabolites can cross into the bloodstream, further activating the immune system and fueling inflammation.

Strategies to counteract inflammaging

Lifestyle

Targeted lifestyle interventions have proven effective in reducing chronic inflammation:

• caloric restriction and intermittent fasting,
• Mediterranean diet rich in fiber, polyphenols, and unsaturated fats,
• regular physical activity, capable of increasing lean muscle mass and reducing inflammatory fat mass.

These approaches not only lower inflammatory markers but also improve metabolic and cardiovascular parameters.

Nutrients and bioactive molecules

Supplementation with specific nutrients can also help dampen low-grade inflammation. Among the most studied:

• Omega-3, with anti-inflammatory and cardioprotective effects,
• zinc, vitamin C, vitamin D, and vitamin E, supporting immune defenses and counteracting oxidative stress,
• plant extracts and natural molecules such as:
• Salidroside (from Rhodiola rosea),
• Resveratrol, a well-known polyphenol with anti-aging effects,
• Lycopene, a carotenoid with antioxidant and anti-inflammatory action.

PEA: a natural ally against inflammaging

An emerging role is that of Palmitoylethanolamide (PEA), an endogenous molecule with significant anti-inflammatory and neuroprotective properties.

Its main mechanism of action is the activation of the nuclear receptor PPAR-α, which modulates the inflammatory response. At higher doses, PEA is already used for chronic inflammatory disorders, but at lower doses it may be useful to counteract systemic inflammation associated with aging.

Its documented benefits include:

• general prophylactic anti-inflammatory effect,
• direct action on dysbiosis and intestinal inflammation,
• support in neuroinflammation and neuroprotection,
• improvement of mood and reduction of anxiety and depression through support of BDNF levels,
• regulation of the circadian rhythm, with positive effects on sleep and wakefulness in healthy adults.

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Towards healthy aging

Counteracting inflammaging means not only living longer, but living better. The combination of a healthy lifestyle, targeted supplementation, and innovative molecules such as PEA represents a promising strategy to reduce chronic inflammation associated with aging.

Personalized approaches, tailored to individual characteristics, can truly make a difference in bridging the gap between lifespan and healthspan, paving the way for healthier and more active aging.