The 7 Key Foods of the Mediterranean Diet

The Mediterranean diet is consistently cited by nutritionists, scientists and health organisations as one of the world's healthiest diets. So, understanding why it works requires knowing exactly what (and what shouldn't) find its way onto your plate. The diet is rooted in traditional food and eating habits that have been refined over centuries.

By swapping out ultra-processed foods for nutrient-dense whole foods, plants, healthy fats, and lean proteins, this way of eating (and living) has decades of research suggesting that it has a host of health benefits that work with human instincts, not against them.

Has there been any other diet that has been put under the same scrutiny, or has stood the test of time better than any other? We don't think so. So, this article breaks down the seven foundational foods of the Mediterranean diet and the specific role each of them has in protecting your health.

On this page:

1. Fish and seafood
2. Whole grains
3. Legumes
4. Extra virgin olive oil
5. Dairy and fermented foods
6. Vegetables
7. Red meat and processed meat

1. Fish and seafood

Compared to standard Western diets, fish and seafood have a central place in the Mediterranean diet. They provide unique nutrients that contribute to the diet’s health benefits. It’s no coincidence that other healthy regions around the world (i.e., “blue zones”) all seem to have higher than average intake of fish and seafood.

They seem to particularly like the cheap, fresh, local, and sustainable oily species that are rich in omega-3 fatty acids (e.g., anchovy, mackerel, sardines). Regular consumption of this type of fish represents one of the Mediterranean diet's most distinctive features.

The cardiovascular health benefits of fish intake are well researched. Consuming fish two to three times weekly reduced deaths caused by cardiovascular disease compared to lower intakes of fish.^[1]

These benefits are thought to come from the long-chain omega-3 fatty acids: eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). These nutrients are shown to reduce inflammation, improve blood vessel health and your blood lipid profile.^[2] 

Beyond the cardiovascular benefits, regular intake of fish supports brain health. The human brain is nearly 60% fat, with DHA being an important component of your nerves. Regular fish intake (particularly of the fatty species) has been associated with slower cognitive decline, reduced dementia risk, and better memory in older adults. Studies suggest that consuming fish at least twice a week may reduce Alzheimer's disease risk, with benefits more obvious when fish replaces red meat.^[3]

The nutritional benefits of fish also extend beyond omega-3s. Seafood provides high-quality protein, meaning it is beneficial for maintaining muscle mass. Fish also provides essential micronutrients that are often lacking in modern diets: vitamin D, selenium, iodine, and B vitamins, particularly vitamin B12.

Smaller fish, which are commonly consumed whole (like sardines and anchovies), also provide calcium from their edible bones, which can support the health of your own bones.

Sustainability and safety considerations matter when adding fish to your diet. Fatty fish like salmon, mackerel, sardines, herring, and anchovies offer the highest omega-3 content and are generally among the more sustainable choices. Smaller fish, lower on the food chain, also tend to accumulate fewer environmental contaminants like mercury compared to the large predatory ones. 

Practical implementation is straightforward:

• Aim for at least two servings of fish a week, with at least one being a fatty variety rich in omega-3s. A single serving only equals approximately 3–4 ounces (85–115 g) once cooked.
• If you don’t like the flavour of fish, try some simple Mediterranean preparations. Grill it with lemon and herbs. Bake it with tomatoes and olives. Pan-sear it with garlic, rosemary, and olive oil. Gently poach it with aromatic vegetables.
• Canned fatty fish like tuna, sardines, mackerel, and wild salmon offer convenience and affordability while providing the same health benefits as fresh varieties, making regular consumption more accessible to everyone.

2. Whole grains

The distinction between whole grains and refined grains is important. Traditionally, Mediterranean people consumed grains in minimally processed forms: whole wheat bread, bulgur wheat, farro, barley, and brown rice. These whole grains retain their nutrient-rich bran and germ.

Studies have shown that consuming three servings of whole grains a day reduces the chances of dying from nearly all major diseases. But these benefits (mostly) disappear when the grains are refined.^[4][5][6]

The health benefits of whole grains seem to come from the combination of nutrients they provide.

• The bran layer provides a lot of fibre, both soluble and insoluble, which slows digestion, stabilises blood sugar levels, lowers cholesterol, and feeds your “good” gut bacteria.
• The germ of the whole grain also contains B vitamins, vitamin E, healthy fats, and minerals (like magnesium, selenium, and zinc).

Whole grains also deliver phytonutrients that have antioxidant and anti-inflammatory properties. This combination of many different nutrients works together in ways that isolated nutrients can't replicate (known as the "food matrix effect").^[7]

Whole grains support health in many ways:

• Their fibre content improves insulin sensitivity and helps control blood sugar, making them valuable for the prevention and management of diabetes.
• The “resistant starch” in whole grains reaches your colon intact (i.e., not digested or absorbed), where it ferments to produce short-chain fatty acids. These short-chain fatty acids reduce inflammation and support gut and metabolic health.
• Regular intake of whole grains is also associated with a healthier body weight, probably because they keep you feeling fuller for longer.^[8]

As part of the Mediterranean diet, whole grains are typically consumed as part of balanced meals rather than by themselves. Whole-grain bread accompanies vegetable-rich stews, bulgur wheat forms the base of tabbouleh: a salad loaded with herbs and vegetables, barley is added to soups along with legumes, and pasta (preferably whole wheat) is served with tomato sauces and vegetables.

Combining whole grains with other Mediterranean foods increases the absorption of some of their nutrients and improves their flavour. The easiest way to get more of them into your diet is to replace refined grains with whole grain alternatives: choose whole wheat or whole grain bread over white, brown rice or farro over white rice, whole wheat pasta over regular, and steel-cut or rolled oats over instant oats and cereals. For most people, a lot can be gained by making this simple switch.

Portion sizes on the Mediterranean diet tend to be "moderate", meaning roughly half to one cup of cooked grains per meal. Grains serve as a base for vegetables, legumes, and healthy fats rather than dominating the plate.

Ancient grains like farro, bulgur, freekeh, and barley offer nutritional variety, along with authentic Mediterranean flavours, if you want to keep it traditional.

3. Legumes

Legumes: beans, lentils, chickpeas, and peas are an important part of the traditional Mediterranean diet. They provide affordable, nutritious, high-quality plant protein that contributes towards the diet's health benefits. Several studies have reported that higher legume intake is associated with a reduction in the risk of cardiovascular disease, type 2 diabetes, and overall death rates.^[9]

The nutritional content of legumes explains their protective effects. They provide a rare combination of protein, complex carbohydrates, and both soluble and insoluble fibre in one food. All these nutrients work together to help control blood sugar levels better, improve satiety and fullness, and support good metabolic health.^[10]

Legumes have a low glycemic index, meaning they cause gradual rather than rapid rises in blood sugar, making them particularly valuable for diabetes prevention and management. Their soluble fibre binds with cholesterol in your digestive system, helping lower “bad” LDL cholesterol levels and reducing cardiovascular disease risk.^[11]

Beyond macronutrients, legumes deliver an impressive mix of micronutrients that are often missing in most diets. They're rich in folate, iron, magnesium, potassium, and zinc. These minerals are crucial for everything from red blood cell formation to bone health and keeping the immune system working.

Legumes also provide nutrients with antioxidant and anti-inflammatory properties. Their resistant starch reaches the colon “intact”, meaning it feeds “good” gut bacteria that support health. They are the natural “prebiotics” that improve gut microbiome diversity and health.^[12]

Legumes appear in countless traditional Mediterranean dishes. They’re generally combined with other ingredients (including other carbohydrates like whole grains and vegetables) and other flavourful ingredients (like olive oil, herbs, and spices).

Greek fasolada (white bean soup), Italian pasta e fagioli, Spanish lentil stew, Middle Eastern hummus and falafel, and Turkish bulgur-lentil pilaf are just a few famous examples. The practice of soaking dried legumes and cooking them slowly not only improves their digestibility but also improves their nutritional content.

Legumes are cheap, easy to cook, and can be stored for months. Aim for at least three servings a week, or daily for maximum benefits. A single serving is only half a cup cooked (80-90 g).^[13]

Canned legumes are readily available and offer convenience as they are already cooked. They can be added to bulk out and improve the nutrition of soups, stews, and salads. They can also be puréed and made into healthy dips and spreads (like chickpea hummus). Not only that, but they can even be used to replace some meats in traditional Mediterranean dishes.

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4. Extra virgin olive oil

The health benefits of extra virgin olive oil are well researched. Studies have shown that consuming extra virgin olive oil (~ 4 tbsp a day) improved cardiovascular health and protected against “cardiovascular events” (like heart attacks and strokes).^[14]

These benefits are thought to come from its unique fatty acid profile. The “monounsaturated” oleic acid in extra virgin olive oil is thought to improve cholesterol ratios, reduce “bad” LDL cholesterol, and improve blood vessel function compared to other fats.^[15]

In addition to its healthier fat profile, extra virgin olive oil is unique, as it offers a high concentration of “polyphenols”: plant compounds with antioxidant and anti-inflammatory properties.

“Oleocanthal”, one of the most studied polyphenols, has anti-inflammatory effects that have been compared to ibuprofen. “Oleacein” and “hydroxytyrosol” are other antioxidants found in extra virgin olive oil that protect your cells and their contents, and prevent premature biological ageing.

Studies have shown that the higher polyphenol content of extra virgin olive oil reduces inflammation and blood pressure and improves blood vessel health compared to other refined oils.^[16]

Extra virgin olive oil intake has also been associated with reduced risk of type 2 diabetes, certain cancers, cognitive decline, and better brain health. The polyphenols in the extra virgin olive oil can get into the brain, where they reduce inflammation and keep the brain functioning properly.^[17][18]

Lastly, the healthy fats found in extra virgin olive oil can also help the absorption of fat-soluble vitamins (A, D, E, K) and antioxidants from vegetables (e.g., carotenoids, lycopene) when they're consumed at the same time.

Not all olive oils are created equally. The "extra virgin" classification means the oil comes from the first cold pressing of olives without any chemical processing. This is important because it preserves maximum polyphenol content. High-quality extra virgin olive oil typically has a peppery, slightly bitter taste as the polyphenols create a sensation of burning in the back of the throat. 

Storage is equally important: light, heat, and oxygen degrade some of these beneficial compounds, so choose oils in dark bottles, store away from heat and light, and use within a few months of opening. While cost often reflects quality, not all expensive oils are superior; look for harvest dates, certifications, and single-origin sources where possible.

Right away, you can start using extra virgin olive oil as your primary fat for cooking (under 375°F or 190°C) and finishing soups, stews, salads, whole grains, and really most types of Mediterranean dishes. It tends to complement everything. It’s even used to make cakes, cookies, and desserts in the Med.

Researchers have reported that you can even lose weight and improve health while still consuming quite a lot of extra virgin olive oil, despite it being calorie-dense¹⁶. But simply replacing all other refined fats with extra virgin olive oil, where you can, is a good first step to getting it into your diet.

5. Dairy and fermented foods

Dairy products in the Mediterranean diet occupy a middle ground. They’re consumed regularly but moderately, usually as fermented forms like yoghurt and cheese rather than just cow's milk.

Fermented dairy products, particularly yoghurt, have their own unique health benefits. The fermentation process creates “probiotics”: live bacteria that are linked with better gut health, immune health, metabolic health and healthier body weights. These benefits are thought to come from the protein, calcium and other probiotic compounds found in fermented dairy.^[19][20][21]

Dairy intake in the traditional Mediterranean diet differs from the modern Western diet in both the type of dairy and the quantity of it. Mediterranean people (historically) consumed dairy from sheep or goat’s milk, which has a different nutritional profile from cow’s milk.

Cheese appears in the Mediterranean diet in small amounts from aged varieties like feta, pecorino, or manchego. It's generally used to flavour or season dishes rather than as the centrepiece. Consumption of fresh cow’s milk is relatively uncommon.

Dairy foods provide several important nutrients. They provide an unparalleled quality of protein, which supports muscle mass and muscle health. The calcium and vitamin D in dairy also support bone health and possibly cardiovascular health.

The probiotic content of yoghurt has gained more attention recently. The live bacterial cultures found in yoghurt (like Lactobacillus and Bifidobacterium bacteria) can survive in your stomach and reach your colon, where they interact with your “microbiome”, which is increasingly recognised as important to your overall health.^[22]

Probiotics produce short-chain fatty acids that can reduce inflammation, improve the strength of your gut, and improve metabolic health. Generally, the greater the diversity of the microbiome and the number of beneficial species, the better the health benefits. 

Some people respond better to dairy products than others. Digestive discomfort, inflammation, and other side effects are reported (by some people) after eating dairy.

Lactose intolerance is high in the Mediterranean, which may explain why dairy intake is low and why fermented products and cheese are preferred. Those of you who're sensitive to dairy can minimise or eliminate it. Just ensure that you can get enough calcium and high-quality protein from other foods.

If you choose to eat dairy:

• Choose plain, full-fat Greek yoghurt or equivalents (like skyr or kefir) over sweetened varieties. You can always add fruit, nuts, or honey for extra flavour (and nutrients). Yoghurt and dairy can be eaten for breakfast, used as a base for dips like tzatziki, or as an addition to soups, stews, or sauces.
• Small amounts of aged, flavourful cheese can be added to dishes to improve their taste and nutrition: feta crumbled on salads, Parmesan shaved over vegetables, and manchego served with fruit.
• Servings of dairy should be limited to one to two a day.

6. Vegetables

Many studies have shown that people who eat large amounts of vegetables and fruits (over 8 servings a day) have lower rates of cardiovascular disease, cancer, and death compared to those who have low intakes. Even modest intake (5 or more servings a day) can improve health outcomes. Vegetables are particularly healthy, having stronger protective effects on health than fruits do.^[23]

Why are vegetables (and fruits) so healthy? Their protective effects on health come from their high concentration of hundreds of different phytonutrient compounds. Different coloured vegetables provide different types of phytonutrients.^[24]

• Red tomatoes and peppers provide lycopene and casacin
• Orange carrots and squash provide beta-carotene
• Dark leafy greens contain lutein, folate, and vitamin K
• Purple eggplant and red cabbage contain anthocyanins
• White onions and garlic provide organosulfur compounds. 

The hundreds of different phytonutrients work together as antioxidants to reduce inflammation, support liver and kidney function, protect your cells, and protect your DNA.

The fibre of the vegetables (both soluble and insoluble) slows digestion, helps stabilise blood sugar, lowers cholesterol, feeds your gut bacteria and makes you feel fuller from fewer calories. The water content of vegetables and their low-calorie density mean that you can basically eat as many vegetables as you want without gaining weight.

The quantity, quality, and preparation requirements of vegetables in the Mediterranean are a lot higher than in typical Western diets. Historically, Mediterranean people consumed 3–4 times the quantity of vegetables a day (6-8 servings).

Mediterranean diet cooking maximises both nutrition and flavour: vegetables are roasted in olive oil, eaten raw in salads, simmered in tomato sauces or stews, and they are stuffed with grains and herbs.

Vegetables are gently cooked in olive oil, which provides healthy fats and also increases the absorption of fat-soluble vitamins and several phytonutrients (like lycopene, lutein, polyphenols, and beta-carotene). The variety of vegetables eaten in the Mediterranean is also far wider than in the West.^[25]

In addition to the well-known common types, Mediterraneans also eat wild greens, bitter leaves, fresh herbs and seasonal specialities like horta, puntarelle, cardoons and chard, to name a few. This ensures they have an intake of a wide variety of phytonutrients, which leads to better health outcomes compared to the intake of a limited variety of whole foods.

Change your mindset to make vegetables the foundation of every meal, not just a side dish.

• Half your plate should be vegetables for lunch and dinner.
• Start meals with a salad, a vegetable soup, or crudités with olive oil and balsamic or hummus dip.
• Add vegetables to bulk out dishes where they are not traditional: add spinach and tomatoes to eggs, zucchini in or instead of pasta, cauliflower ‘couscous’.
• Try different cooking methods: roasting, char-grilling, and sautéing in olive oil all add extra flavour.
• Try getting used to eating bitter vegetables like arugula, radicchio, chicory and broccoli rabe. They're particularly good for you.
• Season generously with Mediterranean flavours: garlic, lemon, fresh or dried herbs and extra virgin olive oil. Do whatever makes you more likely to eat them.

7. Red meat and processed meat

The health risks associated with red meat are controversial but still well-researched. Some studies have linked red meat intake with increased risk of cardiovascular disease and death rates. Processed meats in particular are linked with even worse health outcomes.

Consequently, several major health organisations recommend limiting red meat and processed meats. The reasons behind red meat’s negative effect on health are well debated.

1. Firstly, the higher saturated fat content of red meats and processed meats has been linked with higher “bad” LDL cholesterol and cardiovascular disease.
2. The heme iron, found in animal meat, is thought to promote inflammation and oxidative stress when too much is consumed.
3. Cooking red meat at high temperatures produces potentially carcinogenic substances.
4. It negatively changes your gut microbiome, which is linked to cardiovascular disease.
5. Some of the preservatives used in processed meats are also linked to cardiovascular disease and cancer risk.

Sources: ^{[26][27][28][29][30]}

Replacing red meats with plant proteins like legumes, nuts and whole grains reduces cardiovascular disease and death rates. Substituting red meat for fish is also thought to produce similar beneficial effects on health. These recommended replacements align with the Mediterranean diet eating patterns.

Red meat is limited in the Mediterranean diet and consumed sparingly rather than excluded entirely (it’s eaten monthly in small amounts). When they eat red meat, it is typically reserved for special occasions or used in small amounts along with other protein sources. This controlled intake of red and processed meat really differentiates it from the typical Western diet. 

When red meat is consumed, it is usually grass-fed and unprocessed, quite different from grain-fed, low-quality, processed meats that dominate modern Western diets. Current advice varies, but most suggest limiting red meat to no more than two servings (3.5 oz or 100 g) a week.

The Mediterranean diet builds meals around legumes, fish, poultry, eggs and other plant proteins as the main protein source. Although red and processed meats aren’t banned, they’re consumed in small amounts and of generally high quality.

Adding small amounts of prosciutto to bean soups, ground lamb to vegetable stews, or a celebratory roast chicken are all fine for special occasions. The money saved on purchasing less red meat can be diverted to buying fresh fish, quality olive oil and seasonal, locally produced fruit and veg.

If you want more information about the Mediterranean diet, which includes beginner's guides, tips, tricks, hacks, recipes, meal plans, shopping lists and more articles about the diet's health benefits, see our Mediterranean Diet page.

Mediterranean Diet

The Mediterranean diet is based around eating vegetables, fruits, whole grains, legumes, nuts, olive oil as the main fat, eating fish with some meat.

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