When María Branyas Morera passed away in August 2024 at the age of 117, she left behind more than just a record as one of the world’s oldest humans—she offered scientists a genetic and dietary treasure map to extreme longevity. Born in San Francisco in 1907, the Spanish supercentenarian survived two world wars, the 1918 flu pandemic, and COVID-19. Now, a groundbreaking study led by geneticist Manel Esteller of the University of Barcelona has uncovered the biological secrets behind her extraordinary lifespan, revealing that her cells were biologically 17 years younger than her chronological age and that her gut microbiome resembled that of a newborn infant.
The Science Behind Living Past 115
Esteller’s team conducted what experts call the most comprehensive analysis ever performed on a person aged over 110. The study examined Branyas Morera’s DNA and gut microbiota, identifying two central pillars of her longevity: genetic advantages and lifestyle habits that worked in synergy.
“Her mind was completely clear. She could recall memories from when she was four years old, which is remarkable. And she had no cardiovascular disease, which is extremely common in the elderly,” Esteller told researchers. “Her only limitations were mobility and hearing difficulties. Truly incredible.”
The analysis showed that Branyas Morera’s biological tissues functioned at a level consistent with someone nearly two decades younger. Her gut microbiome was dominated by Bifidobacteria—a type of probiotic that promotes an anti-inflammatory state in the body. This bacterial profile closely mirrors that of a healthy infant, suggesting that her digestive ecosystem played a critical role in staving off chronic inflammation, a known driver of aging and disease.
The Mediterranean Diet Connection: Three Cups of Yogurt a Day
While genetics provided a foundation, Branyas Morera’s daily habits offer actionable lessons for anyone seeking to extend their healthspan. Her dietary pattern was remarkably consistent and rooted in traditional Mediterranean eating.
Most striking was her habit of consuming three cups of natural yogurt every single day. This fermented food is rich in live probiotics, particularly Bifidobacteria, which directly support gut health. Fermented dairy products have been linked to reduced risks of cardiovascular disease, type 2 diabetes, and certain cancers, largely through their anti-inflammatory and immune-modulating effects.
Her broader diet included:
- Abundant fruits and vegetables, providing antioxidants and fiber that combat oxidative stress
- Whole grains and olive oil, staples of the Mediterranean pattern known for heart health
- Moderate fish consumption, offering omega-3 fatty acids
- No smoking or alcohol, eliminating two major contributors to cellular damage
She also maintained daily walks outdoors, prioritized time in nature, and cultivated strong social connections while avoiding toxic relationships. These psychosocial factors are increasingly recognized by longevity researchers as critical components of healthy aging.
What This Means for You: Translating Science Into Daily Practice
The story of María Branyas Morera is not merely a curiosity—it reinforces a growing body of evidence that gut health is central to how we age. The gut microbiome influences everything from immune function to brain health, and nurturing it through diet may be one of the most powerful anti-aging strategies available.
Key takeaways for readers:
- Incorporate fermented foods like yogurt, kefir, kimchi, or sauerkraut into your daily routine. Aim for at least one serving per day to support probiotic diversity.
- Adopt a Mediterranean-style diet rich in plant-based foods, healthy fats, and lean proteins. This pattern consistently ranks among the best for longevity.
- Avoid smoking and limit alcohol—even moderate consumption can disrupt gut bacteria and accelerate biological aging.
- Stay physically active with moderate exercise like walking, which promotes circulation and gut motility.
- Nurture social bonds; isolation and chronic stress are linked to inflammation and shorter lifespans.
The Road Ahead: Implications for Aging Research
The findings from Branyas Morera’s study open new doors for understanding how to delay the aging process at a cellular level. Researchers are now investigating whether specific probiotic supplements or dietary interventions could replicate the gut microbiome profile seen in supercentenarians. If successful, this could lead to targeted therapies for age-related diseases.
For now, the lesson from the world’s oldest woman is both simple and profound: you are what you eat—and what your microbes digest. By feeding your gut the right foods, you may not only add years to your life but life to your years.