7 Surprising Foods That Nutritionists Link to Longevity

Ask most people to guess what centenarians eat and the answers tend to sound familiar: kale, salmon, maybe a green smoothie. Actual longevity research keeps turning up a stranger, far more interesting list, foods that rarely make it onto a typical wellness influencer’s plate.

Nutritionists studying the diets behind unusually long lives have found some genuinely unexpected names worth paying attention to.

Dark Chocolate

A large randomized trial called COSMOS gave more than 21,000 older adults either a daily cocoa flavanol supplement or a placebo over several years. Participants taking the cocoa extract had a 27 percent lower rate of death from cardiovascular disease compared to those on placebo, according to researchers at Brigham and Women’s Hospital who led the study.

The catch is that most commercial chocolate bars won’t get anyone close to that dose, since the alkalizing process used to reduce bitterness destroys much of the flavanol content. Non-alkalized, high-cocoa dark chocolate is a closer match, though still nowhere near the concentrated amount used in the actual trial.

Coffee

Multiple large cohort studies, including data from hundreds of thousands of participants tracked over more than a decade, have found that regular coffee drinkers face a measurably lower risk of dying during the study period than non-drinkers. One analysis of 90,000 adults found the lowest mortality risk among people drinking two to three cups a day.

The benefit appears strongest for black coffee or coffee with minimal added sugar and cream, and it largely disappears for decaffeinated versions in several studies. Researchers still aren’t certain exactly which compounds are responsible, though caffeine and plant polyphenols remain the leading suspects.

Chili Peppers

An Italian study following more than 22,000 people for eight years found that those who ate chili peppers more than four times a week were roughly a third less likely to die of heart disease than those who rarely touched them. A later analysis pooling several international studies found regular chili pepper eaters had a 25 percent lower risk of death from any cause.

Researchers point to capsaicin, the compound responsible for a chili’s heat, as a likely factor, since it appears to reduce inflammation and support healthier blood vessels over time. The effect showed up regardless of whether people were otherwise eating a Mediterranean-style diet or a less healthy one.

Natto

Natto is fermented soybeans with an intensely sticky texture and a smell that puts off plenty of first-time tasters, even within Japan. A large study following nearly 93,000 people for close to 15 years found that higher intake of fermented soy foods like natto and miso was linked to a 10 percent lower risk of death from any cause.

Natto also contains nattokinase, an enzyme studied for its ability to help break down blood clots, along with an unusually high dose of vitamin K2. Unfermented soy foods like plain tofu didn’t show the same protective association in the same research.

Sheep’s and Goat’s Cheese

Sardinia, one of the five original Blue Zones researcher Dan Buettner identified for unusually high numbers of centenarians, isn’t exactly a low-fat, low-dairy place. Shepherds there traditionally eat pecorino made from the milk of grass-fed sheep, a cheese naturally higher in omega-3 fatty acids than typical cow’s milk cheese.

Goat’s milk shows up regularly in the same region’s diet, and researchers studying the area have pointed to its distinct fat profile as a possible contributor to lower rates of inflammatory disease. It’s an odd fit next to more familiar longevity advice about cutting back on saturated fat and dairy in general.

Purslane

Purslane grows wild in gardens and sidewalk cracks across much of the world, which is exactly why most people pull it out instead of eating it. Nutritionally, it’s the richest source of plant-based omega-3 fatty acids among common leafy greens, containing more alpha-linolenic acid than any other vegetable studied so far.

Researchers looking into the exceptional longevity of Crete, a region with famously low rates of heart disease, have pointed to local staples like purslane, walnuts, and figs as likely contributors. It has a mild, slightly tangy, lemony flavor and works well raw in salads or lightly cooked into soups.

Seaweed

Seaweed is a daily staple in Okinawa, the Japanese region famous for having one of the highest concentrations of centenarians anywhere on Earth. Varieties like kombu and wakame are rich in antioxidants, iodine, and a class of compounds called phlorotannins that researchers have linked to reduced inflammation throughout the body.

Unlike many trendy health foods, seaweed’s reputation isn’t built on a single flashy study, it’s built on decades of population-level data from one of the longest-lived places on record. It shows up in Okinawan meals constantly, stirred into soups, wrapped around rice, or eaten as a simple side dish.