People often picture one cuisine, but "Mediterranean diet" is shorthand for how many families around the sea traditionally ate: mostly plants, olive oil as the main fat, fish more than meat, and sweets as a treat. There is no single recipe and nothing to count. What matters is what shows up, and how often, across a week.
That is good news if you are new to this. You do not have to cook Greek or Italian food. Lentil soup, a tin of sardines on wholemeal toast, or a bean and tomato stew all fit. The pattern travels to any country and any budget.
Guidance from heart-health bodies such as HEART UK and the Mayo Clinic is broadly consistent. Aim for plenty of vegetables and fruit every day, whole grains at most meals, a small handful of nuts most days, beans and lentils at least twice a week, fish at least twice a week (one of them oily, such as sardines, mackerel or salmon), and olive oil as your main cooking and dressing fat. Red and processed meat is kept occasional, and sweets and pastries are a treat rather than a daily habit.
Notice that it is not a low-fat diet. Olive oil, nuts and fish bring plenty of fat, but most of it is unsaturated rather than saturated, and that swap is what the research focuses on.
Use the plus and minus buttons to enter roughly how many days (or portions) of each food you had in a typical week. The bars show how close you are to common targets. This is a prompt for thinking, not a score: nobody needs to hit every bar.
Start by adding, not banning: one more bean meal and one more fish meal a week beats a long list of "never again".
The best-known trial is PREDIMED in Spain, which followed roughly 7,400 older adults at high cardiovascular risk. Groups eating a Mediterranean-style pattern with extra olive oil or extra nuts had about 30 percent fewer major cardiovascular events than a control group advised to cut fat. The paper was retracted and republished in 2018 after some participants were found not to have been randomised properly; the corrected analysis gave similar results, but experts noted that confidence in it is weaker and that more trials help.
A lot of other evidence comes from observational studies, which can show that people who eat this way have better health but cannot prove the diet alone is the cause. People who eat Mediterranean-style also tend to move more and smoke less. The honest summary: it is one of the best-supported eating patterns for heart health, it is not a cure for anything, and its benefits come from the whole pattern rather than from any single "superfood".
Olive oil and nuts are energy-dense, so measure with a spoon or handful rather than pouring freely if you are watching your total intake.
This guide is general information, not medical advice. If you have a medical condition, are pregnant or breastfeeding, have or have had an eating disorder, or take medication (especially for diabetes or blood pressure), talk to a doctor or registered dietitian before changing how you eat. Nut allergy, kidney disease, or blood-thinning medicines such as warfarin (which interacts with leafy greens' vitamin K) are examples where individual advice matters.