The Mediterranean diet is the most extensively studied dietary pattern in the world. It is not a list of permitted and forbidden foods, and it is not a six-week program. It is what researchers call a dietary pattern: a combination of proportions, frequencies and habits that, practiced over time, produces measurable effects on health. The PREDIMED study, published in the New England Journal of Medicine, documented about a 35% reduction in cardiovascular risk in groups with high adherence. But there is more distance than most people realize between what the science says and what we think we know about the Mediterranean diet.

For years I paid very little attention to what I ate. Not because I did not like food — quite the opposite — but because I simply ate what was there: what my mother cooked for lunch, what my grandparents prepared on Sundays. No conscious choices, no rules. Inertia, in its most comfortable form.

When I started martial arts, looking for a way to keep panic attacks under control, I began to look at food with slightly different eyes. Only slightly. Enough to notice that there was a relationship between what I ate and how I felt, not enough to turn that observation into real competence.

Then Stefy and I moved in together. That was when we hit bottom, in the gentlest possible sense: two young people working all day, tired in the evening, with just enough energy left to open a ready meal. No rules, no method, excess in every direction. Until the day after my thirtieth birthday, when I looked again at the photos from the celebration. Ninety-one kilos at not quite one meter seventy. I had become a father only a few months earlier. I felt awful. I could not afford to ignore it.

I joined a gym. And with the gym came the desire to eat better. What actually arrived was an endless tour through paleo diets, ketogenic diets, conspiracy theories about “poisons,” food extremists and every other trend with a name authoritative enough to sound like a solution. They all had one thing in common: every one of them failed me.

So I decided to understand the subject properly, once and for all. If I am honest, the trigger was carbonara. I did not want to wait for a special occasion in a restaurant to eat a good one. I wanted to be able to have it whenever I felt like it, made properly, at home. Book after book, course after course, experiment after experiment, I understood that cooking well meant understanding what happens inside a pan, not simply reproducing a sequence of gestures. Why a recipe works that way. Why times and temperatures matter. What happens chemically when you do one thing instead of another.

I turned cooking into a domestic skill — not professional, not chef-level, but solid enough to recognize nonsense from gurus, understand when a nutrition claim holds up and when it is only marketing, and enjoy every food, Nutella included, without the artificial burden of deprivation or guilt.

That is how the Mediterranean diet arrived in my life: not as an ideological choice, not out of nostalgia for southern Italy, but because it is the most studied dietary pattern in the world, it is rooted in the place where I was born, and it answers a practical need. To eat well every day without turning food into a problem.

But let us start from the beginning, and let us be precise.

The Mediterranean diet is not a diet in the way we usually use the word. It is not a list of foods you may and may not eat. It is not a program to follow for six weeks. It is what researchers call a dietary pattern: a set of proportions, frequencies and habits that, practiced over time, produces measurable effects on health. That distinction is not technical trivia. It changes everything. You cannot “cheat” on a pattern. A pattern does not fail because you eat pizza one evening. A pattern is a way of relating to food, not a contract you have to obey.

And real indulgences — the ones that are part of a normal life — are not merely allowed; they are necessary. If you eat well 80% of the time, you have every right, and a few good reasons, to eat whatever you want the remaining 20%. The problem is not the indulgence. The problem is when indulgence becomes the rule and the rule becomes the exception.

There is not even a single official definition codified in one World Health Organization or FAO document. What exists instead is an operational scientific consensus, built around the Mediterranean Dietary Score proposed by researcher Antonia Trichopoulou in 1995. It identifies nine dietary components with defined quantitative thresholds: vegetables, legumes, fruit and nuts, preferably whole grains, fish — especially oily fish — extra-virgin olive oil as the main fat, moderate dairy, moderate poultry and little red or processed meat. FAO and CIHEAM have formally recognized it as a sustainable dietary model: protective of ecosystems, accessible, nutritionally adequate and culturally rooted.

Two features distinguish it from almost every other dietary pattern commonly described as “healthy.” Fat intake can be high — even above 35% of total energy — provided those fats come mainly from extra-virgin olive oil, nuts and oily fish. And red wine, consumed moderately with meals, appears as a component in the original studies, although today that is the most debated and controversial part of the model.

In 2013, during the eighth session of UNESCO's Intergovernmental Committee for the Safeguarding of the Intangible Cultural Heritage in Baku, the Mediterranean diet was inscribed on the Representative List of the Intangible Cultural Heritage of Humanity, through a joint nomination by Italy, Greece, Spain, Morocco, Portugal, Croatia and Cyprus. The first inscription had already taken place in 2010. It is worth being clear about what that recognition means, because it is often misused: it certifies nothing about health. Under UNESCO's 2003 Convention, intangible cultural heritage means knowledge, rituals, symbols and practices transmitted from generation to generation. It is an anthropological form of protection. Anyone citing it as scientific proof is using the wrong source.

The scientific evidence comes from somewhere else.

The starting point is the Seven Countries Study, led by Ancel Keys from the late 1950s onward. Keys followed around 12,000 middle-aged men in sixteen cohorts across seven countries, measuring cardiovascular risk factors, coronary heart disease and mortality, with follow-up that eventually extended to sixty years. He was the first to connect Mediterranean dietary patterns empirically with lower cardiovascular risk.

It is a foundational study. It is also a study with structural limitations that should be named honestly.

First: Keys did not select the seven countries neutrally. They were chosen in part because available data already appeared to support his hypothesis. The findings may still be correct, but the selection creates a risk of confirmation bias that cannot be removed after the fact.

Second: not all 12,000 participants kept detailed food records. Dietary habits were measured in smaller subgroups within each cohort, using methods that were not entirely uniform across countries.

Third: the study included only men, mostly from rural populations. Its results could not be transferred directly to women or to urban populations with different lifestyles.

Fourth, and perhaps most subtly: people who ate in a “Mediterranean” way in the 1950s were often also people who walked more, slept more, ate with others and had less office-related stress. No statistical tool can completely separate the effect of food from the rest of that life context. This does not invalidate Keys's findings: decades of later research have confirmed the direction of the associations. It simply means the Seven Countries Study is a starting point, not the final word.

The strongest endpoint available today is PREDIMED — Prevención con Dieta Mediterránea — a Spanish multicenter trial involving 7,447 people at high cardiovascular risk. Participants were assigned to three groups: a Mediterranean diet supplemented with extra-virgin olive oil, a Mediterranean diet supplemented with nuts, or a low-fat control diet. Researchers then measured how many people in each group experienced a heart attack, stroke or cardiovascular death.

The results published in 2013 in the New England Journal of Medicine showed a significant reduction in cardiovascular events in the two Mediterranean-diet groups. In 2017, however, an external analyst identified statistical anomalies: around 1,600 of the 7,400 participants had not actually been assigned to groups in a fully random way. The paper was retracted and republished in 2018 with a corrected analysis excluding those participants.

The result held. Cardiovascular event risk in the Mediterranean groups remained significantly lower than in the control group, with a reduction of roughly 35%. But the study formally lost the status of a perfectly randomized trial, which lowered the quality of the evidence in scientific grading terms. It is important to say that clearly because hiding it would be dishonest. It would be equally wrong to use that flaw to dismiss the entire body of evidence on the Mediterranean diet.

The current scientific consensus rests on systematic reviews and meta-analyses. A 2023 meta-analysis published in Heart, covering more than 678,000 women, found that greater adherence to a Mediterranean diet was associated with a 24% lower risk of cardiovascular events. More recent meta-analyses also report favorable effects on blood pressure, triglycerides, LDL cholesterol, insulin resistance and all-cause mortality.

According to GRADE — one of the most widely used international systems for assessing certainty of scientific evidence — the quality of evidence for the most important clinical outcomes is generally classified as “moderate.” Not high, not low. Moderate means there are good reasons to trust the direction of the result, but future studies could change the size of the estimated effect. That is not a weak position. It is the scientifically honest one.

So far, that is what the Mediterranean diet is. It is also worth saying what it is not.

It is not necessarily low-calorie, and it is not low-fat. It is not a uniform eating pattern practiced today across Mediterranean countries: current diets in Italy, Greece and Spain have moved considerably away from the 1950s model on which many early studies were based. And it does not exist outside the broader lifestyle context: physical activity, sleep quality, the way meals are eaten and the social dimension of the table all matter.

And here is perhaps the most important point: most of us are convinced we already follow the Mediterranean diet. Pasta, olive oil, tomatoes — done. In reality, the pattern described in the scientific literature is much more precise: defined frequencies, specific proportions, ingredient quality and the context of eating. What we practice in everyday life often differs substantially from what researchers call “high adherence to the Mediterranean diet.” That is not something to feel defensive about. It is simply useful information to start from.

One last point, and the most delicate. Chronic diseases — cardiovascular, metabolic, oncological — do not arise from one single culprit. It is not sugar. It is not gluten. It is not pasta at night. They almost always result from interactions between genetic predisposition and a lifestyle that either amplifies or counteracts it. Diet matters enormously within that picture. But there is no single food that causes disease and no single food that cures it. There are dietary patterns that, over time, move risk in one direction or the other.

Everything you find here starts from that awareness.