EFSA recommends 0.83 g of protein per kilogram of body weight per day for a healthy adult; the Italian LARN recommendations updated in 2024 indicate 0.9 g. For people who exercise regularly, the range rises to 1.2–1.6 g per kilogram. Fitness culture has turned protein into the answer to everything, but the Mediterranean diet shows that the quality and variety of protein sources matter at least as much as quantity, and that legumes, oily fish and whole grains are enough for the vast majority of people.

There was a precise moment when protein became the answer to everything. Want to lose weight? More protein. Want to build muscle? More protein. Want to resist aging? More protein. The message has been simplified to the point where “eat protein” has become a universal nutrition tip, applied to every goal in every context.

Reality is more nuanced and, in some ways, more reassuring.

Start with the official numbers. EFSA — the European food-safety authority — recommends 0.83 grams of protein per kilogram of body weight per day for a healthy adult. WHO gives the same figure. The Italian LARN values, updated in 2024, indicate 0.9 grams per kilogram. For a 70-kilogram person, that means about 58–63 grams of protein a day. It is not an enormous amount — it is easily reached through an ordinary diet, without supplements, high-protein plans or obsessive calculations.

For people who exercise regularly, things change: the strongest evidence indicates that around 1.2–1.6 grams per kilogram per day best supports muscle-protein synthesis, with intakes up to 2 grams for people who train very intensely with weights. But that is an athletic population — not the general population.

What happens when someone eats far more protein than they need? For healthy people, the safety margin is fairly broad. EFSA itself notes that twice the recommended intake can be considered safe for healthy adults. Risk becomes more concrete for people who already have impaired kidney function — even subclinically, without knowing it — because a prolonged protein excess increases the kidneys’ workload and may accelerate an existing decline. For the rest of the population, long-term data are not definitive, but the main authorities recommend caution beyond certain levels.

One of the most common myths is worth clearing up immediately: the “anabolic window.” The idea that you have to eat protein within thirty minutes after training or you will “waste” the benefits of exercise has been systematically dismantled by the scientific literature. Available reviews indicate that the dominant factor is total protein intake across the day — not the exact moment at which protein is consumed. A favorable metabolic window after exercise does exist, but it is much longer than thirty minutes. And distributing protein sensibly across meals — roughly 20–30 grams per meal — matters more than precise timing around a workout.

Another myth: plant protein is inferior. It is partly true that no single plant protein source contains all essential amino acids in the optimal proportions found in animal proteins. That is physiology, not opinion. But in everyday life, combining legumes and grains — as Mediterranean cooking naturally does — solves the issue structurally: legumes are low in methionine, grains in lysine, and together they complement each other. Available meta-analyses show comparable outcomes for strength and muscle mass between diets based on varied animal and plant proteins when total protein intake is equivalent.

The Mediterranean diet approaches protein differently from the Western model — and differently from the high-protein model that dominates fitness culture. Total protein intake in the traditional Mediterranean diet is generally lower than in the Western diet, and the distribution of sources is completely different. Legumes and whole grains form the base and are eaten daily. Fish — especially oily fish rich in omega-3 — appears two or three times a week. Fermented dairy foods such as yogurt and cheese are present in moderation. Eggs and poultry are occasional. Red meat is rare, not eliminated but limited to a few times a month.

It is not a high-protein diet. It is a diet in which the quality and variety of protein sources matter as much as quantity.

Legumes deserve a closer look because they are the least understood protein pillar. Their bioavailability — how much of the protein they contain is actually absorbed and used by the body — is lower than that of animal proteins. That is a real fact. But legumes bring something steak does not: soluble fiber that lowers LDL cholesterol in a dose-dependent way, a low glycemic index, and an overall nutritional profile that multiple meta-analyses associate with lower cardiovascular and metabolic risk. Cooking and fermentation reduce so-called “antinutrients” — compounds that interfere with absorption — and make legumes far more digestible and nutritious than their reputation suggests.

There is one final group that deserves separate attention: older adults. As we age, the body becomes progressively less efficient at responding to a protein stimulus — building and maintaining muscle requires higher thresholds. ESPEN guidelines recommend at least 1.0–1.2 grams per kilogram per day for healthy older adults, with each meal ideally containing 25–30 grams of good-quality protein to maximize the muscular response. The main protein risk in older adults is not eating too much — it is eating too little, especially among women with a low overall calorie intake.

Adherence to the Mediterranean diet in older adults is associated with a lower risk of sarcopenia — the progressive loss of muscle mass that compromises mobility and independence. The mechanism is not only about protein: the anti-inflammatory effects of extra-virgin olive oil and polyphenols, dietary fiber and the variety of protein sources contribute together. The practical limitation is that the traditional Mediterranean diet, with its moderate protein intake, may not be sufficient for sedentary older adults unless portions are considered consciously.

The summary is this: protein matters, but not in the way fitness culture often tells the story. You do not need massive amounts to be healthy, you do not have to consume it within a precise post-workout window, and it does not have to come from animals to be effective. What you need is an adequate intake — adjusted for age and physical activity — distributed across the day and drawn from varied sources. The Mediterranean diet already provides this structurally. That is not a coincidence.