Anti-Inflammatory Eating After Cardiac Arrest

An anti-inflammatory diet after cardiac arrest directly addresses one of the primary biological drivers of cognitive impairment and fatigue. Inflammation is a normal part of the body’s response to injury, but when it becomes chronic, persisting long after the initial insult, it causes ongoing damage to the brain. Neuroinflammation is one of the main mechanisms underlying cognitive problems, fatigue, and mood disturbance after cardiac arrest. The British Heart Foundation’s guide to anti-inflammatory foods and the Harvard T.H. Chan School of Public Health’s anti-inflammatory diet overview provide useful complementary reading.

Neuroinflammation After Cardiac Arrest: Why an Anti-Inflammatory Diet Matters

During cardiac arrest, the sudden absence of blood flow causes a cascade of cellular damage. When circulation is restored, through CPR and defibrillation, a secondary injury process called ischaemia-reperfusion injury occurs. The return of oxygenated blood triggers an inflammatory response in the brain that can persist for weeks or months. Microglial cells (the brain’s immune cells) become chronically activated, releasing inflammatory cytokines that impair neuronal function and inhibit neurogenesis.

This is not a theoretical process; it is one of the well-established explanations for why cognitive problems, fatigue, and mood changes persist in cardiac arrest survivors long after the heart has recovered. Anti-inflammatory dietary strategies are therefore not a peripheral consideration; they address one of the core biological drivers of post-arrest sequelae.

The Mediterranean Diet and Anti-Inflammatory Eating After Cardiac Arrest

The Mediterranean diet is the most extensively studied dietary pattern in relation to both cardiovascular and neurological health. It is characterised by high consumption of vegetables, fruits, whole grains, legumes, nuts, and olive oil; moderate consumption of fish and seafood; moderate consumption of dairy and poultry; and low consumption of red and processed meat. It is also, by coincidence rather than design, a strongly anti-inflammatory dietary pattern.

The evidence base is remarkable in its consistency. The PREDIMED trial — a large Spanish randomised controlled trial — found that a Mediterranean diet supplemented with extra virgin olive oil or nuts reduced major cardiovascular events by approximately 30% compared to a low-fat control diet. Subsequent analyses of the same dataset found significantly lower rates of cognitive decline in the Mediterranean diet groups. The MIND diet — a hybrid of the Mediterranean and DASH diets developed specifically for brain health — has shown associations with slower cognitive decline and reduced Alzheimer’s risk.

For cardiac arrest survivors, the Mediterranean diet represents the single most evidence-supported dietary approach for both cardiac and neurological recovery.

Extra Virgin Olive Oil

Extra virgin olive oil deserves particular attention. It is rich in oleocanthal, a polyphenol with anti-inflammatory properties comparable to low-dose ibuprofen in laboratory studies. It also contains oleic acid, a monounsaturated fat that reduces LDL cholesterol oxidation, as well as a wide range of other polyphenols with antioxidant and anti-inflammatory effects.

Use extra virgin olive oil as your primary cooking and dressing fat. The PREDIMED protocol used approximately four tablespoons daily. Cold-pressed, unfiltered versions with a recent harvest date have the highest polyphenol content — the characteristic peppery sensation at the back of the throat is a direct indicator of oleocanthal concentration.

Omega-3 vs Omega-6 Balance

The ratio of omega-6 to omega-3 fatty acids in the diet significantly affects inflammatory balance. Omega-6 fatty acids (found predominantly in vegetable oils such as sunflower, corn, and soybean oil) are pro-inflammatory in excess; omega-3 fatty acids are anti-inflammatory. In the UK diet, this ratio is typically around 15:1 in favour of omega-6 — far higher than the 4:1 or lower ratio associated with lower inflammatory markers.

Practical steps to improve this ratio: reduce consumption of seed oils and products made with them (many processed foods, crisps, baked goods, and fast food); increase consumption of oily fish, walnuts, and flaxseeds; use olive oil as your primary fat.

Turmeric and Curcumin

Curcumin, the active compound in turmeric, is one of the most studied natural anti-inflammatory compounds. It inhibits NF-κB — a key molecular switch that drives inflammatory gene expression — and has been shown to affect microglial activation in animal models. Human trials are less conclusive, partly because curcumin is poorly absorbed from food in its standard form.

Absorption is significantly improved by combining turmeric with black pepper (piperine increases bioavailability by up to 2000%) and by consuming it with fat. Add a generous pinch of turmeric and black pepper to soups, stews, scrambled eggs, roasted vegetables, or golden milk. Curcumin supplements with piperine or in phospholipid complex form (such as Meriva) have better bioavailability than standard turmeric powder supplements.

Foods to Reduce

The anti-inflammatory approach is as much about reducing pro-inflammatory foods as it is about adding beneficial ones:

Ultra-processed foods — associated with elevated inflammatory markers in multiple large studies; the correlation is dose-dependent
Added sugar — drives insulin resistance and activates inflammatory pathways; particularly damaging in excess; includes sugary drinks, confectionery, and many packaged foods
Trans fats — largely eliminated from the UK food supply but still present in some imported products; strongly pro-inflammatory
Excess red and processed meat — associated with elevated inflammatory markers; processed meat (bacon, sausages, ham) is the most significant concern
Excess alcohol — disrupts gut barrier integrity and promotes systemic inflammation; see our Alcohol and the Recovering Brain page

A Simple Weekly Framework

You do not need to follow a strict Mediterranean diet to benefit from its anti-inflammatory effects. These weekly targets capture the most impactful elements:

At least 5 portions of vegetables daily, including at least one dark leafy green
2 portions of oily fish per week
A small daily handful of nuts, including walnuts
Extra virgin olive oil as the primary cooking fat
Legumes (lentils, chickpeas, beans) at least 3 times per week
Whole grains rather than refined grains, where possible
Red meat no more than once or twice per week; minimal processed meat
Limit added sugar to occasional rather than daily