Doctors Investigate the DNA of a 117-Year-Old Woman: Can One Food Really Contribute to Longevity?
Stories about people who live beyond 100 years naturally capture our attention. When someone reaches 110, 115, or even 117 years old, many people immediately wonder: What is their secret? What did they eat? And is there one food that helped them live so long?
The image above makes a particularly strong claim, suggesting that doctors investigated the DNA of a 117-year-old woman and discovered one food that contributes to longevity.
It is an intriguing idea—but the science of longevity is much more complicated than identifying a single “magic” food.
A person's ability to live to an exceptionally old age is influenced by genetics, lifestyle, environment, socioeconomic factors, medical care, physical activity, sleep, nutrition, and plain biological variation. Even among exceptionally old people, there is no single diet that explains everyone's longevity.
Still, studying people who reach extreme ages can teach researchers fascinating things about healthy aging.
What Happens to the Body as We Age?
Aging involves gradual changes throughout the body.
Cells accumulate damage over time. The immune system changes. Muscle mass and bone density can decline. Blood vessels become less flexible, and the risk of chronic diseases generally increases.
Yet people age at very different rates.
Some individuals develop multiple chronic diseases relatively early in life, while others remain remarkably healthy into their 90s and beyond.
Researchers studying exceptionally long-lived people are interested in understanding why some individuals appear to resist age-related disease better than others.
This is where genetics becomes particularly interesting.
Can DNA Influence How Long You Live?
Yes—but genes are only part of the story.
Research suggests that genetics plays a role in longevity, particularly at the extreme end of the lifespan. Certain genetic variants may influence processes involving inflammation, cholesterol metabolism, cellular repair, immune function, and protection against some age-related diseases.
However, having “good longevity genes” doesn't guarantee that someone will live to 100.
Lifestyle and environment remain extremely important.
Two people can have similar genetic characteristics but experience very different health outcomes because of differences in diet, smoking, alcohol consumption, physical activity, sleep, infections, stress, healthcare access, and other factors.
DNA can influence longevity, but DNA does not provide a simple expiration date.
Why Researchers Study People Who Reach 110+
People who live to 110 or older are sometimes referred to as supercentenarians.
They are exceptionally rare.
Researchers are interested in these individuals because they may have biological characteristics that allow them to delay or avoid some diseases associated with aging.
Scientists have investigated areas including:
- Genetic variation
- Immune-system function
- Inflammation
- Cardiovascular health
- Metabolic health
- Cellular aging
- Gut microorganisms
- Lifestyle patterns
But studying a small number of exceptionally old people creates an important scientific challenge.
An observation is not automatically a cause.
If a 117-year-old person regularly ate a particular food, that doesn't prove the food caused the person to reach 117.
The “One Food” Problem
Imagine researchers discover that an exceptionally old person ate yogurt every day.
It would be tempting to conclude:
“Yogurt is the secret to living longer.”
But that conclusion would be premature.
Perhaps the person also exercised regularly.
Perhaps they never smoked.
Perhaps they maintained a healthy weight.
Perhaps they had favorable genetics.
Perhaps they had strong social relationships.
Perhaps they consumed relatively little alcohol.
Perhaps they simply happened to avoid several major diseases.
The food may have been part of a healthy dietary pattern, but that doesn't mean it was the reason the person lived so long.
This is an important distinction between association and causation.
What Foods Are Generally Associated With Healthy Aging?
Although there is no proven food that guarantees exceptional longevity, nutrition research consistently supports dietary patterns rich in minimally processed foods.
These commonly include:
Vegetables
Vegetables provide fiber, vitamins, minerals, and numerous plant compounds.
Fruits
Fruit provides fiber, potassium, vitamins, and naturally occurring plant compounds.
Legumes
Beans, lentils, and chickpeas provide protein, fiber, and other nutrients.
Whole grains
Whole grains can provide fiber and important micronutrients.
Nuts and seeds
These provide unsaturated fats, protein, fiber, and minerals.
Fish
Fish can provide high-quality protein and, depending on the species, omega-3 fatty acids.
Fermented foods
Foods such as yogurt and certain fermented vegetables can be part of a healthy diet, although claims that one fermented food dramatically extends lifespan require much stronger evidence.
The bigger picture is much more important than one ingredient.
What About the Mediterranean Diet?
One of the dietary patterns frequently studied in relation to cardiovascular health and healthy aging is the Mediterranean-style diet.
It emphasizes vegetables, fruits, legumes, whole grains, nuts, olive oil, and other minimally processed foods, with moderate amounts of fish and other animal products.
Research has associated this dietary pattern with several favorable health outcomes, particularly regarding cardiovascular and metabolic health.
But again, the evidence does not mean that eating a Mediterranean-style diet guarantees a long life.
Healthy aging involves far more than food.
Exercise May Be Just as Important
Nutrition receives enormous attention in longevity stories, but physical activity is another major component of healthy aging.
Regular movement can help maintain:
Muscle strength
Balance
Cardiovascular fitness
Bone health
Insulin sensitivity
Mobility and independence
For older adults, maintaining muscle strength and balance can be especially important because falls and loss of physical function can have major consequences.
You don't need an extreme exercise program to benefit.
Walking, resistance training, swimming, cycling, mobility exercises, and other activities can all contribute to an active lifestyle when appropriately matched to a person's health and abilities.
Social Connections Matter Too
Longevity isn't only about food and exercise.
Human beings are social creatures, and strong social relationships are associated with better health outcomes in many studies.
Older adults who maintain meaningful relationships and remain socially engaged may benefit from emotional support, mental stimulation, and a greater sense of purpose.
This doesn't mean that having a large social circle guarantees longevity.
Rather, it highlights how complicated healthy aging really is.
A long life is the result of many interacting factors—not one ingredient.
What Can We Learn From a 117-Year-Old?
Perhaps the most valuable lesson isn't discovering a secret food.
It's understanding that exceptional longevity is multifactorial.
If researchers study the DNA of a person who reaches 117, they may identify interesting biological characteristics that could help scientists understand aging.
But that doesn't mean researchers can simply translate those findings into a supermarket shopping list.
Genetics may explain part of the person's exceptional lifespan.
Their lifestyle may explain another part.
Their environment, healthcare, habits, relationships, and chance may explain additional pieces.
And there may still be factors scientists don't fully understand.
Be Careful With “Secret Longevity Food” Headlines
Social-media posts often transform complicated scientific findings into simple formulas:
Eat this food → live longer.
Unfortunately, human biology rarely works that neatly.
If a headline claims that researchers have discovered one food responsible for a person's extreme longevity, look for the original scientific study and ask:
- How many people were studied?
- Was there a comparison group?
- Was the research observational or experimental?
- Did researchers actually demonstrate causation?
- Were other lifestyle factors considered?
- Has the finding been replicated?
These questions can help separate fascinating science from exaggerated internet claims.
The Bottom Line
Living to 117 is extraordinary, and studying people who reach extreme ages may help researchers understand the biological mechanisms of healthy aging.
But there is currently no single food that can be proven to make people live to an exceptionally old age.
A person's longevity reflects a complex interaction between genetics, nutrition, physical activity, medical care, environment, social factors, and many other influences.
Instead of searching for one magical ingredient, focus on the habits supported by a much broader body of evidence:
Eat a varied, nutrient-rich diet.
Stay physically active.
Avoid smoking.
Limit excessive alcohol.
Maintain a healthy weight and blood pressure.
Get appropriate preventive healthcare.
Stay socially connected.
And remember that genetics matters—but it isn't destiny.
The real secret to healthy aging may not be hidden in one extraordinary food. It may be found in thousands of ordinary healthy choices repeated over an entire lifetime.