Cardiovascular disease remains the leading cause of death in the UK — responsible for approximately 160,000 deaths annually. The evidence that diet significantly affects cardiovascular risk is among the strongest in all of nutritional epidemiology. The PREDIMED trial, the PURE study, and decades of prospective cohort data consistently point to the same dietary patterns protecting cardiovascular health. This guide covers the UK-specific context. See our anti-inflammatory diet guide, our omega-3 guide, and our women's heart health guide for related reading.
The dietary patterns with the strongest evidence
The Mediterranean dietary pattern has the strongest cardiovascular evidence base of any dietary pattern — the PREDIMED trial demonstrated a 30% reduction in major cardiovascular events in high-risk adults following a Mediterranean diet supplemented with extra virgin olive oil or nuts, compared to a low-fat diet. The DASH dietary pattern (Dietary Approaches to Stop Hypertension) has the strongest evidence specifically for blood pressure reduction — a major cardiovascular risk factor affecting one third of UK adults.
Foods that protect the heart
Extra virgin olive oil: oleic acid and polyphenols improve HDL cholesterol and endothelial function. Oily fish (two portions weekly): EPA and DHA reduce triglycerides, reduce arrhythmia risk, and reduce systemic inflammation. Nuts (30g daily): multiple large cohort studies find 30g of mixed nuts daily associated with 28-30% reduced cardiovascular event risk. Legumes (daily): soluble fibre reduces LDL cholesterol. Dark leafy greens: nitrates support vasodilation and blood pressure reduction. Whole grains: reduce LDL and cardiovascular risk compared to refined grains.
Foods that increase cardiovascular risk
Trans fats (now largely eliminated from UK food supply through regulation, but still present in some imported products and hard margarines). Processed meats: consistently associated with cardiovascular risk in prospective studies. Refined carbohydrates and ultra-processed food: drive insulin resistance, central adiposity, and triglyceride elevation. Excessive sodium: blood pressure elevation. Saturated fat from processed sources (not from whole dairy or unprocessed meat, where the evidence is more nuanced): LDL elevation.
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