The longevity diet

A longevity diet is a way of eating built mostly from plants and whole, barely processed foods. Beans, vegetables, fruit, whole grains, nuts and olive oil fill the plate. Some fish, enough protein for your age and little sugar or ultra-processed food complete it. Diet books argue loudly about the details, but the research on eating for a long life keeps coming back to the same seven rules.

1. Plants fill most of the plate

In the Mediterranean diet,^[1] and in the Blue Zones, including the Seventh-day Adventists of Loma Linda^[24] plants make up most of the plate. Vegetables, fruit, beans, whole grains and nuts do the heavy lifting in all of them.

2. Food quality before calorie counting

What you eat deserves more of your attention than tallying every calorie. In a recent trial, two diets both followed national healthy-eating advice. The minimally processed one still led to more weight loss than the ultra-processed one.^[33] So this guide is built around foods and how processed they are, not around the numbers on a label.

3. Enough protein, and the right amount changes with age

Protein helps you keep muscle as you get older. That is why the official reference rises from 0.8 to 1.0 g per kg of body weight at 65.^[18] Midlife is the more debated stretch, because of one large observational study (one that watched what people ate rather than assigning a diet).

In that study, people aged 50 to 65 who got 20% or more of their calories from protein were compared with those who got under 10%. Over 18 years, the high-protein group had 75% higher overall mortality and four times the cancer mortality.^[12] That link weakened or vanished when the protein came from plants, and in people over 65 more protein went with lower mortality.^[12] The study also rests on a single day of food records and did not look at younger adults. So it is a warning sign rather than proof, and it supports choosing plant protein in midlife rather than cutting protein overall.

4. Good fats, not low fat

The Mediterranean diet is not low in fat, because it picks olive oil, nuts and fish instead of butter and fatty meat. In PREDIMED, a Mediterranean diet with extra olive oil or nuts beat advice to cut fat on the combined risk of heart attack, stroke or cardiovascular death.^[1] Overall mortality is a different story. A review of 40 diet trials found that Mediterranean and low-fat programs both beat minimal advice, with no convincing difference between the two.^[22] So the case for good fats rests mainly on the heart.

5. Easy on sugar and refined carbs

Too much added sugar is linked to weight gain and metabolic disease,^[31] and through those to the illnesses that become common with age. Refined carbs such as white bread and pastries bring quick sugar without the fiber of the whole-grain version.^[7] That is why both sit on the list of foods to limit.

6. Meal timing: a sensible habit with little proven extra benefit

Longo recommends eating within 12 hours and nothing in the 3-4 hours before bed.^[15] It is a reasonable habit, but the evidence that it helps beyond the food itself is thin. In a year-long trial in adults with obesity, adding an 8-hour eating window to calorie restriction brought no extra weight loss.^[27]

7. Consistency beats perfection

The cohort studies in this guide link people's usual way of eating to their health over many years, in one case 25 years.^[13] So a decent diet you can keep for years is closer to what they describe than a perfect plan you drop after six weeks.

The Mediterranean diet has the strongest evidence of the four eating patterns that come up most often, because a large trial has tested it. Blue Zone eating, the MIND diet and the fasting-mimicking diet rest on weaker or narrower evidence. Many people who search for "longevity diet" also mean Valter Longo's book of that name, which borrows from several of these patterns.

The Mediterranean diet

The Mediterranean diet has the most consistent evidence of the four. It comes from long-running cohorts (large groups of people followed for years) and from a large randomized trial, in which chance decides who gets which diet. On the plate it looks like this:

• Olive oil as the main fat
• Vegetables and fruit at every meal
• Whole grains, beans, nuts and seeds
• Fish and seafood in moderation
• Not much red meat
• Wine with meals is traditional, but do not start drinking for health; see alcohol below,^{[10, 16]}

In a 25-year US study of 25,315 women, those who followed the pattern most closely had 23% lower mortality. That gap shrank to 11% once other lifestyle factors were accounted for^[13] a shrinkage that is typical of observational data. A pooled analysis of cohort studies points the same way, though it rates its own evidence as low quality.^[14]

PREDIMED is the randomized trial that turns the Mediterranean diet from an observational hunch into something tested. It assigned 7,447 Spanish adults aged 55 to 80 at high heart risk to one of three diets. Two groups ate a Mediterranean diet with extra virgin olive oil (the cold-pressed kind) or mixed nuts, and the third got advice to eat less fat. Over about five years, extra olive oil or nuts cut major heart events by roughly 30%.^[1] Those events were heart attack, stroke or cardiovascular death, counted together, and strokes showed the clearest drop on their own.^[1]

That 30% is a relative figure. In absolute terms, about 5.7 in 100 people on the low-fat advice had a major event within five years. On the Mediterranean diets, it was 3.6 to 4.0 in 100.^[1] The result also survived a correction. The first paper was withdrawn because some sites had not assigned people to their diets properly, and the re-analysis kept the main result.^[1]

The amounts in the trial are the part that carries over to your own kitchen. Each household in the olive oil group received about 1 liter of extra virgin olive oil a week.^[1] The target for the participant was roughly 50 g (about 4 tablespoons) a day, and the nut group got 30 g of mixed nuts a day.^[1] Those amounts set the upper targets in this guide.

Blue Zone eating

Dan Buettner's team surveyed regions with unusually many very old people, from Sardinia to Okinawa to Loma Linda, and summarized their food habits like this.^{[24, 25]}:

• About 95% plant-based
• Beans every day, at least half a cup cooked
• Meat rarely, around five times a month on average
• Whole grains such as corn, rice and barley
• About two handfuls of nuts a day
• Water as the main drink
• The 80% rule: stop eating before you feel full

These are descriptions of how people eat, not trial results. A preprint (a study not yet peer-reviewed) has also questioned some of the age records behind the Blue Zones^[26] Our Blue Zones guide covers that debate. Either way, the list shows what long-lived groups eat, not proof that the food made them long-lived.

The MIND diet

MIND crosses the Mediterranean diet with DASH, a diet designed to lower blood pressure, and aims the result at the brain. Its food list.^[3]:

• Leafy greens (6+ servings a week)
• Other vegetables (1+ serving a day)
• Berries (2+ servings a week)
• Whole grains (3+ servings a day)
• Fish weekly, poultry twice a week
• Beans, nuts, olive oil
• Go easy on red meat, sweets, cheese and fried food

An observational study linked close MIND adherence to up to 53% lower Alzheimer's risk^[3] A large randomized trial has since put the diet to the test. It enrolled 604 older adults with no memory or thinking problems, all overweight, with a family history of dementia and a poor diet at the start.^[2] Over three years, thinking skills improved about equally on the MIND diet and on the control diet.^[2]

The design of that control diet matters here. Both groups cut calories slightly and got the same counseling and weight-loss support. The control group simply was not told to change which foods it ate. So the trial could not show an extra benefit from the MIND food list. A small benefit is still possible but unproven, and the trial measured thinking scores, not dementia cases.

The fasting-mimicking diet (FMD)

Valter Longo's fasting-mimicking diet is a 5-day stretch of low-calorie, low-protein, plant-based eating, repeated once a month. It is meant to bring some effects of a fast without stopping food entirely. The studies used ProLon, L-Nutra's packaged kit, which is low in protein. It supplies about 1,100 kcal on day 1 and about 720 kcal on days 2 to 5.^[4]

A 2024 analysis went back to blood samples from two of its clinical trials.^[4] In the first trial, 52 people completed 3 monthly cycles. Their biological age score, which is built from routine blood values, fell by a median of about 2.5 years compared with their own starting values.^[4] Not everyone improved, though. Across both trials, roughly a quarter of participants got older rather than younger on the score. The average drop was also smaller than the median, about 1.5 years.^[4]

Those numbers come with clear limits. It was an exploratory follow-up analysis that no independent group has repeated.^[4] Its only comparison group, 16 people from the first trial who kept their normal diet, showed no change.^[4] Longo, the senior author, holds equity in L-Nutra, the company behind ProLon, though the paper states his equity will go to charity.^[4]

The results also come from the kit, so they do not automatically carry over to a home-made version. Diet is one lever among several in our guide on how to slow aging, and for the FMD, whether it adds healthy years is still unknown.

Skip the FMD if you are pregnant or breastfeeding, underweight, ill with a fever or infection, or allergic to ingredients such as nuts or soy.^[44] Skip it too if you have a history of eating disorders. If you have diabetes or any other diagnosed condition, or take regular medication, talk to your doctor first and do not adjust medication on your own. The manufacturer says people under 18 or over 70 should only do it under medical supervision.^[44]

Valter Longo's book The Longevity Diet

Longo's 2018 book is what many people mean by the term, and his own website summarizes its everyday rules for adults.^[15]:

• Mostly vegan, plus fish at most 2-3 times a week
• Protein around 0.7-0.8 g per kg of body weight until 65 (he gives 0.31-0.36 g per pound), slightly more after 65
• About 3 tablespoons of olive oil and 1 oz (about 28 g) of nuts a day
• All eating inside a 12-hour window, nothing in the 3-4 hours before bed
• Two meals plus two small low-sugar snacks if you gain weight easily, otherwise three meals plus one snack
• A multivitamin every three days

Mostly vegan means planning for vitamin B12, which a multivitamin every three days may not reliably cover^[37] Protein needs a similar check. The bottom of Longo's range, about 0.7 g/kg, sits slightly below 0.8 g/kg. That is the official reference for adults in Germany, Austria and Switzerland, known as DACH,^[18] so do not go below it without advice.

In midlife, the protein study from rule 3 points to choosing plant protein rather than cutting total protein.^[12] If you are over 65 or lift weights, aim higher, as the DACH reference does from 65^[18] and as Longo himself does. The protein target in the plan below gives the numbers.

What all four share

The four patterns argue about protein, timing and fasting, yet they agree on the plate itself. It holds mostly plants and whole foods, uses olive oil and nuts as the main fats, and has very little room for processed food or sugar. That shared plate is what the food list below takes apart, one food at a time, with an amount for each.

The foods most consistently linked to a longer life in large observational studies are legumes, vegetables and fruit, nuts, olive oil and whole grains.^{[5, 6, 7, 23, 29]} Fish, berries and fermented foods round out the list on weaker or more indirect evidence. Most numbers below come from observational studies. Read each one as a link seen across large groups of people, not as a promise for your own plate.

The table gives the amount to aim for and the main finding for each food.

Sources: as cited in each row.

Legumes: beans, lentils, chickpeas

Beans are the backbone of Blue Zone diets, according to Buettner's surveys, and their guideline is at least half a cup of cooked beans a day^{[24, 25]} The best-known study behind them followed 785 people aged 70 and over in four countries for up to seven years. Legumes were the only food group that consistently predicted survival, with 7-8% lower mortality per extra 20 g a day.^[11]

That is a small study, and a broader one found a weaker link. Across 32 cohorts, each extra 50 g a day went with about 6% lower mortality, with low to moderate certainty.^[23] Germany's nutrition society asks for legumes at least once a week.^[21] Taken together, legumes look like a sensible daily staple rather than a miracle food.

Vegetables and fruit

Germany's nutrition society advises at least 5 portions of vegetables and fruit a day.^[21] In a large meta-analysis, more fruit and vegetables went with lower heart disease and overall mortality up to about 800 g a day.^[29] The link with lower cancer risk ran up to about 600 g.^[29] Leafy greens and cruciferous vegetables such as broccoli and cabbage were among the groups with a link, alongside apples, pears, citrus fruit and salads.^[29]

Those leafy greens need one adjustment for people on blood thinners. If you take a vitamin K antagonist, a blood thinner such as phenprocoumon (Marcumar) or warfarin, you do not need to avoid greens. Raise your intake gradually, though, and tell whoever manages your INR (the blood test that tracks your clotting time), because steady intake matters more than avoidance.^[43]

Nuts

A daily handful (about 30 g) is linked to roughly 20% lower mortality in large observational studies.^[5] Walnuts, almonds and other tree nuts all count toward that handful. The figure is a population average, not a personal promise, because people who eat nuts every day also tend to be leaner, smoke less and exercise more.^[5] In PREDIMED, one group got 30 g of mixed nuts a day on top of Mediterranean diet advice, which fits the observational signal.^[1] The trial cannot separate the nuts from the rest of the diet, though.

Olive oil

Olive oil is the main fat in every Mediterranean plan, and the amount linked to a benefit is smaller than you might expect. In a large US analysis, people who had more than half a tablespoon (about 7 g) a day were compared with people who rarely used it. Their risk of dying from any cause was about 19% lower.^[6]

More than half a tablespoon was already the study's top group, so the study cannot name an ideal amount. It also could not tell extra virgin from refined olive oil.^[6] The benefit showed up when olive oil replaced butter, margarine, mayonnaise or dairy fat, and olive oil did not beat other vegetable oils.^[6] The PREDIMED amount of 50 g carries roughly 450 kcal, so use olive oil instead of butter or margarine rather than on top of them.

Fish

Germany's nutrition society advises fish once or twice a week.^[21] Fatty fish such as salmon, mackerel, herring and sardines supplies EPA and DHA, two omega-3 fats.^[21] Sea fish is also one of the few natural sources of iodine.^[21] Longo's plan caps fish at 2-3 meals a week,^[15] so two fish meals a week fit both.

Berries

In a large study of women aged 70 and over, those who ate the most blueberries and strawberries showed slower cognitive decline.^[30] The difference equaled a delay in cognitive aging of up to about 2.5 years. That result is observational, and the MIND trial did not show an extra brain benefit for its berry-rich food list.^[2] So berries are a good habit rather than a brain treatment.

Whole grains and fiber

Oats, whole barley, quinoa, brown rice and whole wheat keep the fiber that refined versions lose, while pearl barley is polished and does not count.^[46] Whole grains are the easiest route to the fiber intakes that a large meta-analysis linked to lower heart disease, type 2 diabetes and overall mortality.^[7] The fiber target in the plan below turns that into grams.

Fermented foods

Yogurt, kefir, sauerkraut and kimchi are the familiar fermented foods, and they differ more than the shelf suggests. Some, such as yogurt and kefir, contain live cultures, while pasteurized or baked ones, like most shop sauerkraut, may not.^[45] There is no solid evidence yet that fermented foods themselves lengthen life, so eat them because you like them, not as medicine.

On the other side of the plate are the foods to cut back on. They include processed meat, large amounts of red meat, ultra-processed food, added sugar and salt, along with refined carbs, sugary drinks and the last remaining trans fats. Alcohol is on the list too, because no safe amount can be set.^[16] Most of this evidence is observational, and weaker signals are flagged as such.

Processed and red meat

The WHO's cancer agency rates the evidence that processed meat (bacon, sausage, deli meat) causes colorectal cancer as strong, and files it under Group 1.^[20] That grade describes how certain the evidence is, not how large the risk is. The size of the risk is a separate number: each 50 g a day raises colorectal cancer risk by about 18%.^[20] Red meat sits one level lower, in Group 2A, as "probably" cancer-causing.^[20]

Overall mortality points the same way. In two large US cohorts, each extra daily serving of unprocessed red meat was linked to 13% higher mortality.^[28] For processed red meat, the figure was 20%.^[28] Germany's nutrition society advises at most 300 g of meat and sausage a week in total.^[21] In the Blue Zones, meat appears on the plate only about five times a month.^[24]

Ultra-processed foods

Ultra-processed foods are industrial products such as packaged snacks, fast food, sugary cereals and soft drinks, usually made with additives you would not keep in your own kitchen. A large umbrella review, which pooled 45 earlier pooled analyses, rated their link to cardiovascular deaths and type 2 diabetes as convincing.^[8] Their link to death from any cause came out as highly suggestive. Those grades sound firm, but nearly all of the evidence is observational.^[8] Under a second grading system, most of it is still low or very low quality.^[8]

A trial adds what the cohorts cannot. A randomized trial in 55 adults compared two diets that both followed national healthy-eating advice. Over 8 weeks, the minimally processed diet led to somewhat more weight loss than the ultra-processed one, about 2% versus 1% of body weight.^[33]

The category is broad, and the risk differs by type. The European EPIC cohort looked at who went on to develop two or more of cancer, heart disease and type 2 diabetes. That risk was clearest for animal-based products and for sugar- or artificially sweetened drinks, while ultra-processed breads and cereals were not linked to higher risk.^[9] A flavored yogurt and a bag of fried snack pellets share the same label, so the sensible order is to cut the clear offenders first.

Added sugar

Too much sugar is linked to weight gain and metabolic disease.^[31] The WHO advises keeping free sugars under 10% of daily energy, ideally under 5%, which is about 25 g or 6 teaspoons.^[17] The American Heart Association gives its limit for added sugar in calories.^[31] It advises at most about 100 kcal a day for women and 150 kcal for men, roughly 6 and 9 teaspoons.^[31] Neither limit is zero, so a little sugar fits.

Salt

The WHO advises adults to keep salt under 5 g a day (about a teaspoon) and to use iodized salt.^[39] Germany's nutrition society notes that salt often hides in processed foods such as sausage, pastries, fast food and ready meals.^[21] So cooking at home helps more than just leaving the salt shaker alone.

Refined carbohydrates and sugary drinks

White bread, white rice, pastries and other refined grains lose the fiber that made the whole-grain version worth eating.^[7] Sugary drinks (soda, fruit juice, energy drinks, sweetened coffee drinks) are the liquid version of the same problem. In the EPIC cohort, sugar- and artificially sweetened drinks were among the ultra-processed products with the clearest link to disease.^[9] Fruit juice was not part of that group, but the WHO counts its sugar as free sugar.^[17]

Trans fats

If a label lists "partially hydrogenated" oil, the product contains industrial trans fat. Leave it on the shelf.

Alcohol

Older observational studies made moderate drinking (1-2 drinks a day) look neutral or even good for the heart, the famous "J-curve".^[10] A large meta-analysis later corrected those studies for "abstainer bias" (people who quit drinking because they got sick) and other flaws. After that correction, light drinking no longer showed a clear survival benefit.^[10] Mortality rose clearly from about 45 g of alcohol a day, roughly three to four drinks.^[10]

Genetic data point the same way. A large study in China used Mendelian randomization, a method that uses inherited differences in how people handle alcohol to mimic a trial. It found that the apparent protection of moderate drinking against stroke was largely not causal.^[32] WHO experts have since concluded that no safe amount of alcohol for cancer and health can be established.^[16] Their reason is that no threshold has been found below which alcohol's cancer effect starts.^[16] If you drink, less is better.

Not about being perfect

The occasional treat is fine. The aim is to make the healthy choice the default in your kitchen, so that sausage, pastries and soft drinks become the exception rather than the routine.

Making the healthy choice the default is mostly a kitchen job. Add vegetables, beans and whole grains before you worry about cutting anything, and let them crowd the rest off the plate. Knowing what to eat and actually eating it are two different problems. The second is where most diets quietly fall apart, so the habits below are aimed at it.

The half-plate rule

Fill half your plate with vegetables at every meal and split the other half between protein and whole grains. This simple visual rule keeps plants in charge without a calorie counter, and it makes the 5 daily portions of vegetables and fruit.^[21] easy to reach.

A sample longevity day

• Breakfast: 40 g oats with berries and 30 g walnuts, plus Skyr or Greek yogurt for protein.
• Lunch: a big leafy salad with chickpeas, a drizzle of extra virgin olive oil and 2 slices of whole-grain bread.
• Snack: an apple.
• Dinner: 100 g cooked lentils or a salmon fillet, vegetables filling half the plate, plus whole-grain barley or brown rice.
• Evening: the kitchen closes 3-4 hours before bed, as Longo suggests^[15]

Plan the week and cook at home

Small food decisions made late on a tiring day tend to end at the takeaway counter. So plan meals ahead, shop with a list and prep ingredients on the weekend. Cooking at home most of the time is also the simplest way to control how much salt, sugar and fat goes into your food. If you would rather plan with numbers, our free calorie calculator turns your height, weight and activity into maintenance calories and a daily protein target.

Set up your kitchen on purpose

• Keep nuts in plain sight for snacking
• Keep olive oil within arm's reach
• Pre-wash and pre-cut vegetables so they are easy to grab
• Move processed snacks out of sight

Batch cook beans and grains, and store them safely

Cooking big pots of beans, lentils and whole grains on the weekend makes them easy to add to meals during the week. That only works if you store them safely. Cool them quickly and get them into the fridge within 1-2 hours. Eat cooked leftovers within 2 days and freeze the rest in portions.^[40] Cooked rice and grains need stricter timing: refrigerate within 1 hour and eat within 24 hours.^[41]

Prepare dried kidney beans safely

Raw or undercooked red kidney beans contain a lectin, a natural plant protein that causes nausea, vomiting and diarrhea within hours.^[42] These steps make dried kidney beans safe to eat.^[47]:

1. Soak the dried beans for at least 12 hours.
2. Drain them and cover them with fresh water.
3. Boil them vigorously for at least 10 minutes.
4. Then simmer them until soft.

Do not cook dried kidney beans only in a slow cooker, because its lower temperature may not destroy the toxin. Canned beans are already safe to eat^[47]

Grocery list for Germany, Austria and Switzerland

• Produce: lamb's lettuce (Feldsalat), kale (Grünkohl, Oct-Feb), chard (Mangold), savoy cabbage (Wirsing), beetroot (Rote Bete), kohlrabi, seasonal berries (raspberries, blueberries, blackberries).
• Legumes: red lentils, beluga lentils, chickpeas, white beans, kidney beans (dried or in jars; soak and boil dried ones as in the steps above.^[47]).
• Whole grains: rolled oats (Haferflocken), whole spelt (Vollkorndinkel), millet (Hirse), whole-grain barley (Gerste, Nacktgerste), buckwheat, quinoa.
• Fish: herring, mackerel, salmon, sardines, all rich in omega-3 fats^[21]
• Fats: cold-pressed extra virgin olive oil, walnuts, almonds.
• Protein: Quark, Skyr, yogurt, eggs, legumes, fish.
• Salt: iodized salt, used sparingly.^[39]

Drinks

Water, tea and black coffee are the everyday defaults, and sweet drinks stay the exception. For alcohol, the rule from the section on foods to limit applies: if you drink, less is better.^{[10, 16]}

The 80% rule

Eat slowly and stop before you feel completely full, a habit Okinawans call hara hachi bu.^[24] Sharing the meal with friends or family is an easy way to slow the pace.

Your protein target

The official DACH reference for Germany, Austria and Switzerland is 0.8 g of protein per kg of body weight a day, and 1.0 g/kg from 65.^[18] If your BMI (body mass index, weight relative to height) is above 25, use a normal weight for your height in that sum, not your actual weight.^[18] The 2025-2030 US Dietary Guidelines, released in January 2026, set a higher target of 1.2-1.6 g/kg (as of October 2026).^[19] That is well above the number in Longo's book.^[15] Lean to the high end if you are active or older. In midlife, favor plant protein over meat, without dropping below 0.8 g/kg.^{[12, 18]}

Our free protein calculator works out a number from your goal, age and activity, and the same range appears in our intermittent-fasting FAQ. These targets are for generally healthy adults, though. Chronic kidney disease is graded in stages, and G3 to G5 run from a mild-to-moderate loss of kidney function up to kidney failure. For adults in those stages who are not on dialysis (a machine that filters the blood), the international kidney guideline advises about 0.8 g/kg.^[36] It also advises avoiding more than 1.3 g/kg if kidney function is at risk of getting worse.^[36] Older people with frailty or muscle loss may need more, the guideline notes.^[36] On dialysis, or with any kidney disease, agree your number with your kidney doctor.

Your fiber target

In a large meta-analysis of fiber intake, the benefit was greatest at 25-29 g of fiber a day, and higher intakes may help more.^[7] People in the highest intake groups had 15-30% lower all-cause and cardiovascular mortality than those in the lowest.^[7] Germany's nutrition society sets its guide value at at least 30 g a day for adults.^[38] A few everyday foods from a German, Austrian or Swiss kitchen cover much of that. A breakfast of 40 g oats gives about 4 g of fiber, 1 apple about 4 g more, and 100 g cooked lentils about 8 g. Add 2 slices of whole-grain bread (Vollkornbrot, about 6 g) and 30 g nuts (about 3 g).

On the lentil version of the sample day, those foods alone add up to about 25 g. That is the bottom of the range with the best-studied benefit.^[7] The vegetables, chickpeas and berries add several grams more, which brings the day toward the 30 g that Germany's nutrition society advises.^[38]

All of these targets lead back to the same few foods. If you change only one thing this week, a daily portion of beans or lentils is a reasonable place to start. It adds protein and fiber at once, and it sits at the center of every pattern in this guide.