Every few months the internet uncovers a new "secret to longevity" - a fruit, a tea, a spice, whatever, as long as there's a simple answer. The latest star is yogurt, inspired by the life of Maria Branyas, who at 117 years and 168 days was the oldest person in the world before she died in August 2024. For years she ate three yogurts a day. It sounds like a ready-made recipe. It isn't.

The experts are clear: yogurt helps, but it works no miracles on its own. Dr. Manel Esteller of the Sant Pau hospital explains that yogurts carry probiotics - live bacteria that strengthen immunity. But the same expert adds that fiber from vegetables, fruit, legumes, and whole grains is just as important, because it's fiber that feeds the beneficial gut bacteria.

The most interesting fact isn't in the bowl, but in the cells. Epigenetic tests showed that Branyas's biological age was about 20 years younger than her real one. Her microbiota resembled that of someone far younger, with unusually low levels of inflammation - a factor science increasingly believes is key to healthy aging.

Studies of centenarians consistently show the same patterns: not smoking, little or no alcohol, a simple and balanced diet, a healthy weight, regular movement and - perhaps most important - strong family and friendship ties. Loneliness, it turns out, ages you faster than sugar.

The point the health industry doesn't want you to say out loud is simple: longevity rarely depends on a single food. Maria Branyas's three yogurts were one piece of a mosaic built over decades. It's easier to buy yogurt than to change your life - which is why the yogurt story sells, and the story of discipline, movement, and closeness doesn't.