Inflammation is a system property, not a food group problem

You follow the rules. You swapped your usual breakfast for rye toast and salmon. You snack on berries. Your fridge is stocked with fatty fish for dinner, just like the articles on anti-inflammatory eating suggested. Yet you still wake up feeling puffy, your face and fingers swollen. The brain fog descends around 3pm, a thick, soupy static that no amount of green tea can clear. You feel a low-grade, irritable hum under your skin, a sign of a system on high alert. I see this pattern constantly. You are eating all the 'right' things, but your body is still broadcasting an emergency signal because the source of the fire is the nervous system's control room.

Inflammation is a signal, not a diagnosis

Inflammation is your body's emergency response team. When you get a cut or fight off a virus, your immune system dispatches inflammatory cells and proteins to the site. They contain the threat, clean up the damage, and then they are supposed to go home. This is acute inflammation. It’s sharp, effective, and essential for survival.

Chronic, low-grade inflammation is what happens when that emergency response team never clocks off. This is a nervous system problem. A chronically activated sympathetic nervous system—the 'fight or flight' branch—is constantly whispering 'threat' to your immune system. This whisper prompts the release of signalling proteins called cytokines. In small doses, they are essential battlefield commanders. But when released constantly, they create the systemic, low-grade static you feel as brain fog and aches. Your back-to-back meetings, your phone buzzing with notifications, the argument you replay in your head—your body registers all of it as a low-grade danger requiring a cytokine response.

Your immune system does not have a calendar; it cannot tell the difference between a looming deadline and an actual predator. It just listens to the signals from the nervous system. When the signal is a constant, low-level hum of stress, the immune system keeps the inflammatory fires smouldering. Cortisol, your main stress hormone, has a complicated role here. In short bursts, it's powerfully anti-inflammatory, telling the immune system to stand down. But when your hypothalamic-pituitary-adrenal (HPA) axis is chronically activated, your cells can become resistant to cortisol's signal, like a village that has heard the same alarm bell ring for weeks. The cortisol is still there, but its anti-inflammatory message is ignored. At this point, a dysregulated cortisol rhythm can flip its function, contributing to the very inflammation it is meant to suppress. The puffiness and fatigue are the physical readout of a system that has been running on an emergency frequency for too long.

Related anchors: vagal tone anchor · sleep anchor · gut-immune anchor

The Nordic diet is fuel for a calmer system

The anti-inflammatory effect of a dietary pattern like the Nordic diet comes from how it provides the specific raw materials your body needs to turn the alarm off and repair the underlying wiring. It works on a systems level. The high levels of omega-3 fatty acids from fish like salmon, mackerel, and herring are the direct precursors to a class of molecules called specialised pro-resolving mediators (SPMs).

This is the nerdy part that, for me, changes the entire conversation. Most anti-inflammatory advice focuses on blocking the 'on' switch for inflammation with things like antioxidants. SPMs are the 'off' switch. Inflammation requires active resolution; it does not simply stop on its own. SPMs are the molecules that tell the immune system the crisis is over, it's time to clean up, and everyone can go home. Without enough omega-3s, your body literally lacks the parts to build the 'stand down' signal. You are sending the fire crew into a blaze without any water.

Meanwhile, the dense, whole-grain rye breads, oats, and root vegetables provide soluble fibre that feeds your gut microbiome. A well-fed microbiome produces short-chain fatty acids (SCFAs) like butyrate. These molecules are potent signalling agents. Butyrate is a primary energy source for the cells lining your colon, strengthening the gut wall to prevent inflammatory compounds from leaking into your bloodstream. But it also travels to the brain, where it can cross the blood-brain barrier, dial down neuroinflammation, and support the production of calming neurotransmitters. The polyphenols from berries, dark leafy greens, and even coffee are more than simple antioxidants mopping up damage. They act as instructions, telling your genes to activate your body's own powerful, built-in antioxidant and anti-inflammatory pathways. This way of eating gives the crew the tools and the clear instructions to finally go home.

Your plate is not the only tempo

For years, I focused almost exclusively on food as the lever for inflammation. I was wrong. Focusing on food alone is like trying to conduct an orchestra by only speaking to the violin section. Your body's inflammatory state is set by multiple, overlapping rhythms, and food is just one of them. If you are eating perfectly but your sleep, light, and movement tempos are chaotic, you will stay stuck in that inflammatory static.

Sleep is non-negotiable. During deep sleep, your brain's glymphatic system activates. The space between your brain cells increases, allowing cerebrospinal fluid to flush out metabolic waste, including inflammatory proteins that accumulate during the day. Waking up with brain fog after eight hours of 'sleep' is often a sign this clearance process was disrupted because your nervous system never got the all-clear to stand down. A dysregulated HPA axis can keep cortisol high at night, fragmenting your sleep architecture and preventing you from reaching the deep, restorative stages where this cleanup happens. The quality of the physiological quiet you achieve is the real metric.

Light is another powerful tempo-setter. Getting bright, natural light in your eyes shortly after waking helps to anchor your 24-hour cortisol rhythm. This ensures cortisol peaks in the morning to promote alertness and then steadily declines throughout the day. Viewing bright screens late at night does the opposite. The blue-spectrum light suppresses the sleep hormone melatonin and directly stimulates retinal cells that signal to your brain's master clock that it's still afternoon. This keeps your stress system humming and your cortisol elevated when it should be at its lowest, contributing to that 'tired but wired' feeling that fuels inflammation into the next day.

Finally, movement is a signal. A punishing workout when you are already depleted is just another inflammatory stressor. But gentle movement, like a 20-minute walk after a meal, helps manage blood sugar, reduces inflammatory signalling, and can gently stimulate the vagus nerve—a core part of the parasympathetic 'rest and digest' system. The purpose of this movement is to send a signal of safety and regulation to your body.

Common Questions

Do I have to follow the Nordic diet perfectly for it to work?

No. Your body doesn't operate on a pass/fail system. It responds to patterns and ratios over time. The goal is not perfection, which is often just another source of stress. Focus on the principle: shifting the balance towards more oily fish, more root vegetables and berries, and swapping refined grains for whole grains like rye or barley more often than not. One meal will not cause or cure inflammation; the cumulative effect of hundreds of meals will.

What if I'm vegetarian or don't like fish?

You can still apply the principles, but you have to be more deliberate. Plant-based omega-3s from flax, chia, and walnuts are useful, but the body's conversion of them into the EPA and DHA needed for SPM production is notoriously inefficient. A high-quality, algae-based omega-3 supplement is a sensible way to get these critical fats directly. Then, double down on the other pillars: a wide variety of fibre-rich plants to feed your gut microbiome and a rainbow of polyphenol-rich vegetables and berries.

Can I just take a turmeric supplement and be done with it?

Taking a single supplement to fix a system-wide problem is like trying to fix a city's traffic problem by changing one traffic light to green. While compounds like curcumin (from turmeric) do have anti-inflammatory properties, they are a minor intervention compared to the constant inflammatory signalling from a dysregulated nervous system, poor sleep, or a diet lacking in foundational materials like omega-3s and fibre. Use food and rest as your primary tools; supplements are for targeted support, not a substitute for the work.

Closing

Understanding the mechanism is the first step. The next is to apply it in a way that fits your actual life, not an idealised version of it.

• To go deeper on the connection between food and your nervous system, explore The Kokorology Program.
• If you're a coach, learn to apply these principles with your clients in the Somatic-Informed Coach Certification.
• Get the free Nervous System Regulation toolkit to start managing the non-food drivers of inflammation.

TL;DR

Chronic inflammation is a system-wide distress signal often conducted by a nervous system stuck on high alert, more than a food problem. You cannot fix it with a perfect diet alone. A pattern like the Nordic diet works by providing the raw materials—omega-3s for the 'off' switch, fibre for the gut-brain axis—that help your body quiet its own alarms. This is only effective when paired with other tempo-setting inputs like restorative sleep, proper light exposure, and gentle movement that signal safety to the body.

Sources

• Jacka FN (2017). A randomised controlled trial of dietary improvement for adults with major depression (the SMILES trial). BMC Medicine.
• Kox M (2014). Voluntary activation of the sympathetic nervous system and attenuation of the innate immune response in humans. PNAS.
• Serhan CN (2018). The Resolution of Inflammation: A New Therapeutic Frontier. Collected works and primary studies. Nature Reviews.
• Cryan JF & Dinan TG (2019). The Psychobiotic Revolution: Mood, Food, and the New Science of the Gut-Brain Connection. Curated research.