After years of changing food trends—from low-fat to low-carbohydrate, detoxes and "superfoods"—it can be difficult to know what healthy eating really means.

The encouraging news is that nutrition science has become more consistent. While researchers continue to debate specific details, there is broad agreement on the types of foods that support good health for most people.

This article is general information only and is not medical advice. Dietary needs vary between individuals. Readers should seek advice from a qualified health professional or accredited practising dietitian if they have specific medical conditions or nutritional requirements.

Vegetables

If there is one area where nutrition experts largely agree, it is vegetables.

Leafy greens, broccoli, carrots, tomatoes, capsicum, pumpkin and many other vegetables provide vitamins, minerals, fibre and plant compounds associated with good health.

A colourful variety across the week is generally recommended.

Fruit

Fresh fruit provides fibre, vitamins and natural sweetness.

Whole fruit is generally preferred to fruit juice because it contains more fibre and is typically more filling.

Whole grains

Wholegrain bread, oats, brown rice and wholemeal pasta provide complex carbohydrates and fibre that release energy more gradually than highly refined alternatives.

For many people, they form the foundation of a balanced diet.

Quality protein

Protein helps maintain muscle and supports many essential body functions.

Good sources include:

• Fish and seafood
• Lean poultry
• Eggs
• Beans and lentils
• Chickpeas
• Tofu and other soy products
• Lean cuts of meat where appropriate

Many experts also encourage eating fish regularly because of its omega-3 fatty acids.

Dairy and alternatives

Milk, yoghurt and cheese provide calcium and protein.

Those who choose not to consume dairy can often obtain similar nutrients from appropriately fortified alternatives.

Healthy fats

Not all fats are the same.

Foods such as extra virgin olive oil, nuts, seeds and avocado contain fats that are generally considered beneficial when eaten in appropriate amounts.

Foods to enjoy occasionally

Most dietary guidelines suggest limiting rather than completely banning foods high in added sugars, salt and saturated fat.

Soft drinks, confectionery, pastries and many highly processed snack foods are best viewed as occasional treats rather than everyday staples.

Hydration

Water remains the preferred drink for most people.

Adequate hydration supports normal body function and is often overlooked in discussions about nutrition.

Is there a single "perfect" diet?

Probably not.

Patterns such as the Mediterranean diet consistently receive strong scientific support because they emphasise vegetables, legumes, whole grains, seafood, olive oil and minimally processed foods.

However, healthy eating can take many forms across different cultures and cuisines.

The common thread is not a particular country or recipe. It is eating a wide variety of nutritious foods while limiting highly processed products.

The Times View

Nutrition science continues to evolve, but one message has remained remarkably consistent. Healthy eating is usually less about finding the latest miracle food and more about building everyday habits around vegetables, fruit, whole grains, quality protein and minimally processed foods.

The healthiest diet is often not the most fashionable one. It is the one that is balanced, enjoyable, sustainable and realistic enough to maintain for years rather than weeks.