We often associate inflammation with something we can see or feel - a swollen ankle, an aching joint or redness around an injury. But some of the most damaging inflammation is happening silently, deep within our bodies, often for years before we notice anything is wrong.
Inflammation is actually an essential part of our immune system. When we experience an injury or infection, our body launches an inflammatory response to protect us, eliminate the threat and initiate repair. This is known as acute inflammation, and without it, we simply wouldn't survive.
The problem arises when inflammation doesn't switch off.
Chronic, low-grade inflammation occurs when the immune system remains persistently activated, even when there's no obvious injury or infection. Over time, this can interfere with normal cellular function, disrupt metabolic processes and contribute to the development of chronic disease.
And one of the biggest contributors is something we talk about frequently at Inside Health - metabolic dysfunction.
The visceral fat connection
One of the most significant drivers of chronic inflammation is excess visceral fat - the fat stored deep within our abdomen, surrounding our internal organs.
Unlike the fat sitting just beneath our skin, visceral fat is particularly metabolically active. It's not simply an energy storage depot. It behaves like an endocrine and immune organ, releasing chemical messengers that influence everything from insulin sensitivity to inflammation.
As visceral fat accumulates and fat cells become dysfunctional, inflammatory immune cells are recruited into the tissue. Together, they produce inflammatory signalling molecules known as cytokines.
These inflammatory signals can interfere with insulin's ability to do its job, contributing to insulin resistance.
And here's where things become particularly problematic.
Insulin resistance and chronic inflammation can reinforce one another. Metabolic dysfunction can encourage further visceral fat accumulation, which in turn contributes to more inflammation.
It's a vicious cycle, and one that can continue silently for years.
Importantly, you don't necessarily need to be visibly overweight to have excess visceral fat or experience metabolic dysfunction.
Stress, sleep and the inflammatory response
Inflammation isn't driven by diet and body fat alone.
Chronic psychological stress activates our body's stress response systems, including cortisol and the sympathetic nervous system.
While cortisol normally has important anti-inflammatory effects, prolonged stress can disrupt normal cortisol signalling and immune regulation.
Stress can also affect sleep quality, insulin sensitivity, appetite and food choices, adding further pressure to an already struggling metabolism.
Sleep is equally important.
During sleep, our bodies undertake essential processes involved in immune regulation, tissue repair and metabolic recovery. Consistently inadequate sleep can increase inflammatory markers, reduce insulin sensitivity and interfere with appetite regulation.
This is why managing stress and prioritising sleep aren't optional extras when it comes to metabolic health. They're fundamental.
Are ultra-processed foods fuelling inflammation?
Our modern food environment is another important contributor.
Diets dominated by ultra-processed foods are associated with increased inflammatory markers and poorer metabolic outcomes.
These foods are often high in refined carbohydrates, added sugars and excess energy, while being low in fibre, quality protein and protective micronutrients.
They can encourage excess energy intake, contribute to visceral fat accumulation and displace the whole foods that help support metabolic and immune health.
There's also growing interest in how certain food additives and dietary patterns may influence the gut microbiome and intestinal barrier, although research in this area is still evolving.
Our gut microbiome plays an important role in regulating immune function. Beneficial bacteria ferment dietary fibre to produce short-chain fatty acids, including butyrate, which helps maintain the intestinal barrier and regulate inflammation.
This is another reason dietary diversity matters. A variety of vegetables, herbs, nuts, seeds and other plant foods provides different types of fibre and nutrients to support a healthier gut environment.
Why chronic inflammation matters
The consequences extend well beyond feeling tired, bloated or generally unwell.
Persistent low-grade inflammation is implicated in several major health conditions, including:
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Insulin resistance and type 2 diabetes: Inflammatory signalling can interfere with glucose regulation.
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Cardiovascular disease: Inflammation contributes to the development and progression of atherosclerosis.
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Loss of muscle mass: Persistent inflammation can impair muscle maintenance and recovery.
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Cognitive decline: Chronic inflammatory processes are associated with poorer brain health.
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Accelerated ageing: Often referred to as inflammageing, persistent inflammation contributes to several age-related health problems.
Inflammation is one part of a complex picture, rather than the sole cause of these conditions. Nevertheless, reducing unnecessary inflammatory burden is an important part of protecting long-term health.
Muscle: An overlooked anti-inflammatory tool
We often talk about building muscle for strength, body composition and glucose regulation, but muscle also plays an important role in immune health.
Skeletal muscle is an active endocrine organ. When we exercise, our muscles release signalling molecules known as myokines, which help regulate metabolic and inflammatory processes.
Regular resistance training and physical activity can improve insulin sensitivity, support healthier body composition and reduce chronic inflammatory markers over time.
Interestingly, exercise itself produces a temporary inflammatory response. This is normal and necessary for adaptation and repair.
The distinction is that, with appropriate recovery, this response resolves and helps us become stronger.
This is why more exercise isn't always better. Progressive loading, adequate nutrition, quality sleep and recovery all matter.
How do we know if we're inflamed?
One useful marker is high-sensitivity C-reactive protein (hs-CRP), which measures a protein produced by the liver in response to inflammation.
Elevated hs-CRP can indicate increased inflammatory activity, although it doesn't identify the underlying cause. Infections, injuries and other medical conditions can also elevate results.
I prefer to consider inflammation alongside other metabolic markers, including fasting insulin, triglycerides, HDL cholesterol, waist circumference and visceral fat.
Together, these provide a much more meaningful picture than body weight alone.
Reducing inflammation starts with your metabolic health
There's no single food, supplement or quick fix that switches off chronic inflammation.
Instead, we need to address the underlying factors that may be driving it.
That means reducing excess visceral fat, improving insulin sensitivity, prioritising fresh whole foods, building and preserving muscle, supporting gut health, managing stress and getting adequate sleep.
These are the foundations of our approach.
And importantly, many of these improvements begin long before we see dramatic changes in our physical appearance.
A reduction in visceral fat, improved insulin signalling, healthier inflammatory markers and better metabolic flexibility can all represent meaningful progress, even when the scales aren't moving as quickly as we'd like.
The bigger picture?
Your health isn't determined simply by how much you weigh. It's influenced by what's happening inside your body, including how efficiently you regulate energy, how much metabolically active muscle you maintain and whether your immune system is functioning in a balanced way.
Inflammation is essential for life. Chronic inflammation, however, can quietly undermine our health.
The goal isn't to eliminate inflammation. It's to create the metabolic environment that allows inflammation to do its job, resolve appropriately and stop contributing to long-term damage.
And that starts with the choices we make every day.
