The Mediterranean Diet: Why It Is One of the Best for Weight and Health

The Mediterranean diet is not a weight loss diet in the traditional sense — it is a way of eating inspired by the traditional food cultures of countries bordering the Mediterranean Sea. Yet it is one of the most extensively researched dietary patterns in the world, with a strong evidence base for weight management, cardiovascular health, type 2 diabetes prevention, and longevity.

What does the Mediterranean diet involve?

• Plenty of: vegetables, fruit, wholegrains, legumes, nuts, seeds, olive oil, and fish — particularly oily fish such as salmon, mackerel, and sardines
• Moderate amounts of: poultry, eggs, and dairy — particularly fermented dairy such as yoghurt and cheese
• Limited amounts of: red meat, processed meat, refined carbohydrates, added sugar, and ultra-processed foods

Why does it work for weight management?

The Mediterranean diet is naturally high in fibre, protein, and healthy fats — all of which promote satiety and reduce overall calorie intake without the need for strict restriction. It is also low in ultra-processed foods, which are the primary driver of overconsumption in Western diets. The emphasis on whole, minimally processed foods means that the diet is nutritionally dense and metabolically beneficial.

How to adopt a Mediterranean approach

• Use olive oil as your main cooking fat
• Eat fish at least twice a week, including oily fish
• Fill half your plate with vegetables at every meal
• Replace refined grains with wholegrains — brown rice, wholemeal bread, oats
• Snack on nuts and fruit rather than processed snacks
• Eat legumes — lentils, chickpeas, beans — several times a week

For personalised dietary advice as part of a doctor-led programme, speak to the Weight Loss Wales team.