Balanced nutrition fuels the body and brain, supporting long-term health and reducing the risk of cardiovascular and metabolic disease.

What is the relationship between nutrition and chronic disease?

Chronic diseases are strongly influenced by long-term dietary patterns rather than single foods. Highly processed diets — high in refined sugars, saturated fats, and low in fibre — are associated with:

• Increased inflammation
• Insulin resistance
• Unhealthy cholesterol
• Higher cardiovascular risk

In contrast, dietary patterns rich in whole foods are associated with reduced risk. Examples include Mediterranean-style diets, plant-rich dietary patterns, and high-fibre, minimally processed diets — consistently linked to improved cardiovascular and metabolic health outcomes.

How does sugar affect the body?

Sugar — particularly added and refined sugars — is rapidly absorbed and causes quick increases in blood glucose levels. Frequent high intake can lead to repeated insulin spikes, reduced insulin sensitivity over time, increased fat storage, and energy fluctuations.

However, naturally occurring sugars in whole foods (such as fruit) behave differently due to fibre content — and are healthy.

What does the AHA's Life's Essential 8 say about nutrition?

Nutrition is one of the key pillars within this model of cardiovascular health. The framework emphasises overall lifestyle patterns rather than individual nutrients — focusing on long-term behaviours that reduce cardiovascular risk.

A heart-healthy dietary pattern is characterised by:

• Whole foodsFruits, vegetables, whole grains, and legumes — the foundation of every protective pattern in the literature.
• Healthy fatsUnsaturated fats from olive oil, nuts, seeds, and fatty fish.
• Lean proteinsFish, poultry, legumes, and plant-based protein sources.
• Limit added sugars, sodium, ultra-processedWhere most modern cardiometabolic risk concentrates.

Adherence to heart-healthy patterns is associated with lower blood pressure, improved cholesterol profiles, reduced systemic inflammation, and lower risk of cardiovascular events.