Inflammation in the Body: A Key Driver of Many Chronic Diseases

Inflammation has become a widely discussed topic in health and nutrition—but it is also often misunderstood.

So what role does inflammation actually play in the body, and how does it affect our long-term health?

What is inflammation?

Inflammation is a natural and essential part of the immune system.

It is the body’s response to:

• injury

• infection

• toxins

Typical signs include redness, swelling, heat, and pain.

In the short term, this process is protective and necessary for healing.

When inflammation becomes a problem

Problems arise when inflammation becomes chronic and low-grade.

This type of inflammation:

• persists over time

• may not cause obvious symptoms

• can gradually damage tissues

Chronic inflammation has been linked to many common conditions, including:

• cardiovascular disease

• type 2 diabetes

• obesity

• certain cancers

• neurodegenerative diseases

Research suggests that inflammation plays an important role in the development and progression of these conditions.

However, it’s important to understand:

👉 inflammation is one piece of a larger puzzle, not the only cause.

In this article I also cover how chronic inflammation affects different body parts.

Why does chronic inflammation develop?

Chronic inflammation is often influenced by a combination of factors:

1. Diet

Highly processed foods, excess sugar, low fibre, high alcohol intake may promote inflammatory processes.

2. Excess body fat

Adipose tissue (body fat) can release inflammatory signals, especially when present in excess.

3. Physical inactivity

Regular movement helps regulate immune and metabolic function.

4. Stress

Chronic psychological stress can activate inflammatory pathways.

5. Poor sleep

Sleep deprivation is associated with increased inflammatory markers.

6. Gut health

The gut microbiome plays a significant role in regulating inflammation and immune responses.

Inflammation and modern lifestyle

There is growing evidence that modern lifestyle patterns—such as:

• over-nutrition

• sedentary behaviour

• chronic stress

may contribute to persistent low-grade inflammation.

This may help explain why many chronic diseases often appear together and increase with age.

Can you feel inflammation?

Not always.

Unlike acute inflammation, chronic inflammation is often described as “silent” because:

• symptoms can be subtle or absent

• it is typically detected through biomarkers

  
  

How can inflammation be assessed in the body?

Inflammation in the body can be evaluated using certain laboratory markers. However, it’s important to understand that no single test can fully capture the complexity of inflammation, and results should always be interpreted in context.

Common blood markers used in practice

C-reactive protein (CRP)- CRP is one of the most widely used markers of inflammation. It is produced by the liver in response to inflammatory signals in the body.

• Standard CRP is often used to detect acute inflammation or infection

• High-sensitivity CRP (hs-CRP) is used to assess low-grade, chronic inflammation, particularly in relation to cardiovascular risk

👉 General reference ranges (hs-CRP):

• <1 mg/L → low risk / low inflammation

• 1–3 mg/L → moderate

• >3 mg/L → higher inflammation

Some practitioners aim for lower values, but targets such as <0.5 mg/L are not universally established clinical cut-offs.

Homocysteine. Homocysteine is an amino acid involved in methylation processes in the body.

Elevated levels have been associated with:

• increased cardiovascular risk

• cognitive decline

• impaired methylation (often linked to B-vitamin status, especially folate, B6, and B12)

While homocysteine is sometimes discussed in the context of inflammation, it is better understood as a metabolic and cardiovascular risk marker rather than a direct inflammatory marker.

👉 Typical reference ranges:

• ~5–15 µmol/L (laboratory reference range)

• Some experts suggest optimal levels may be in the lower end of this range (e.g. ~5–10 µmol/L)

Other markers that may provide additional context

These markers do not measure inflammation directly but can provide supporting information:

Ferritin. Ferritin reflects iron stores but is also an acute-phase reactant, meaning it can increase during inflammation.

• Elevated ferritin may indicate inflammation, infection, or iron overload

• Low ferritin typically reflects iron deficiency

👉 Interpretation should always consider the broader clinical picture.

White blood cell count (WBC). WBC is part of the immune system response.

• Elevated levels may indicate infection or inflammation

• However, it is non-specific and influenced by many factors

Gut health and microbiome testing. Emerging research shows that gut health plays a role in regulating inflammation.

• Certain microbiome patterns are associated with inflammatory processes

• However, testing methods and interpretation are still evolving

Methylation-related markers. Since homocysteine is linked to methylation, assessing nutrients such as:

• vitamin B12

• folate

• vitamin B6

can provide additional insight into metabolic processes connected to overall health.

While blood tests can offer useful insights, inflammation is a complex, whole-body process.

Rather than relying on a single marker, it is best to:

• look at patterns across multiple biomarkers

• consider symptoms, lifestyle, and medical history

• interpret results with a qualified healthcare professional

How to support a healthy inflammatory balance

Rather than trying to “eliminate inflammation,” the goal is to support balance in the immune system.

Evidence-based strategies include:

Nutrition

• whole, minimally processed foods

• vegetables, fruits, legumes

• healthy fats from nuts, seeds, oily fish, avocado, extra-virgin olive oil

Movement

• regular physical activity

Sleep

• consistent, high-quality sleep

Stress management

• mindfulness, recovery, social connection

 Gut health support

• fibre-rich foods

• fermented foods

Key takeaway

Inflammation is not inherently “bad.”

It is a vital biological process that keeps us alive.

However, when it becomes chronic and dysregulated, it can contribute to the development of many modern diseases.

👉 The goal is not to eliminate inflammation—but to support the body’s ability to regulate it effectively.

If you are looking for nutritional guidance to improve your daily nutrition that supports your health, don't hesitate to reach out to me for personalised nutrition advice at info@katrinpeo.com