Can a handful of nuts or seeds each day help keep your cells younger? A large U.S. study suggests the answer may be yes. Researchers analyzed data from 5,582 adults to see whether nut and seed consumption was linked to telomere length—a key marker of biological aging.

Telomeres are protective caps on the ends of our DNA. They naturally shorten as we age, and faster shortening is associated with chronic disease, inflammation, and accelerated aging. Longer telomeres, on the other hand, are considered a sign of healthier cellular aging.

What the Study Found

The researchers discovered a clear, positive relationship between nut and seed intake and telomere length. Adults who consumed more nuts and seeds had longer telomeres, even after adjusting for age and lifestyle factors.

• For every 1% of daily calories that came from nuts and seeds, telomeres were about 5 base pairs longer.
• Adults who consumed around 5% of calories from nuts and seeds had telomeres equivalent to roughly 1.5 fewer years of biological aging.
• The relationship was linear—more nuts and seeds consistently predicted longer telomeres.

Because telomeres typically shorten by about 15 base pairs per year of life, these differences are meaningful.

Why Nuts and Seeds May Support Healthy Aging

Nuts and seeds are rich in nutrients that help protect cells from oxidative stress and inflammation—two major drivers of telomere shortening. They provide:

• Healthy fats
• Antioxidants
• Minerals like magnesium and zinc
• Plant compounds that support cellular repair

These nutrients may help maintain DNA integrity and slow the cellular wear‑and‑tear that accumulates with age.

Practical Takeaways for Adults Over 60

You don’t need large amounts to benefit. A small handful of nuts or seeds each day—almonds, walnuts, pistachios, sunflower seeds, pumpkin seeds, or mixed nuts—can support healthier aging.

For those watching calories, even modest intake (1–2 tablespoons) appears beneficial.

Reference

The study is available here: Consumption of nuts and seeds and telomere length.