Show Notes
🧬 Telomeres and Time: Can We Really Rewind Aging?
The Lowest Hemoglobin I’ve Ever Seen The lowest hemoglobin I’ve ever seen belonged to a young woman who was still standing. Her blood count was one-fourth of normal. She was pale, short of breath, and strong enough to walk into the clinic. Doctors soon learned her bone marrow had stopped making new blood cells. The diagnosis was aplastic anemia — a true telomere disease. She survived thanks to her fitness, modern science, and a bone marrow transplant from a generous donor in Germany. Two years later, she’s in law school, healthy, and full of life.
What Are Telomeres? Each cell in your body carries chromosomes — long strands of DNA. At the ends of those chromosomes sit telomeres, tiny caps that keep the DNA from unraveling, like plastic tips on shoelaces. Every time a cell divides, its telomeres shorten a little. When they get too short, the cell can no longer divide. Scientists call that stage cellular senescence — cellular retirement. In 2009, researchers Elizabeth Blackburn and Carol Greider won the Nobel Prize for discovering telomerase, an enzyme that can rebuild telomeres. Their discovery sparked dreams of reversing aging. But there’s a catch: cancer cells also use telomerase to live forever. Turning that enzyme on everywhere might turn back time — or turn on tumors. Why Everyone Talks About Telomeres Telomeres became the poster child for longevity marketing. Social media ads promise to “measure your biological age.” Supplement companies claim to “lengthen your telomeres” for hundreds of dollars a bottle. The problem? Telomere tests vary between labs. Results can change by 20 percent depending on the method. They show trends, not destiny.
What’s Being Studied Real scientists are studying how telomeres behave under different conditions. Danazol — a synthetic sex hormone that slows telomere loss in people with inherited marrow failure. It works but brings side effects, so it’s not an anti-aging trick. Henagliflozin — a diabetes drug that increased telomere length in one small study. Whether that helps humans live longer is still unknown. Aripiprazole — an antipsychotic that repaired telomeres in cells after oxidative stress. That’s a Petri dish result, not a prescription for youth.
These drugs show that we can nudge biology, but they’re for disease, not for vanity. Vitamins and Compounds That Might Help Nutrients influence telomere health, too. Vitamin D supports telomerase. Long-term studies show it slows telomere shortening. Vitamins C and E help reduce chemical stress that wears telomeres down. Gamma-tocotrienol, a form of vitamin E, may reverse telomere loss — so far only in lab work. TA-65, from the Astragalus plant, may activate telomerase but carries risk. Turning on telomerase could also fuel cancer. Telomir 1 is experimental and not available outside research.
None of these is proven to extend life. They’re promising ingredients, not miracles in a capsule.
What Lifestyle Still Beats Everything Lifestyle matters more than any supplement. A large study at UCSF showed that people who ate a Mediterranean diet, exercised, and managed stress boosted telomerase activity within months. No powder required. Telomeres respond to care. They’re markers of how you live, not the cause of how long you live. Longer telomeres don’t guarantee longer life — they reflect how your body has handled time, inflammation, and stress.
What Scientists Agree On Research tells a simple story: Telomeres shorten as cells divide. Stress, smoking, and inflammation speed that process. Healthy diets and regular movement slow it. Some medications affect telomere biology but aren’t for general use. We still don’t know if lengthening telomeres increases lifespan.
So far, no pill or powder beats sleep, exercise, and plants on a plate.
The Real Takeaway Telomeres aren’t countdown clocks. They’re mileage markers. Protect them by doing the basics well: eat plants and fish, move daily, sleep enough, m
More from Fork U with Dr. Terry Simpson
With all the spices we have access to, it is amazing how bland recipes have become. I have many cookbooks, some from great chefs, television personalities, and friends. What I am always surprised by is how bland the food has become. People seem to think a bit of salt, pepper, maybe onions, and garlic provide the spices one needs. Perhaps it is because some associate spice with heat. Mostly because many have never experimented with some of those great warm spices available. A pinch of coriander, some freshly ground cumin, a little cardamom, or a touch of cinnamon can turn an ordinary dish into something remarkable. And the most astonishing part is that these spices financed voyages around the world, built cities, created fortunes, and caused people to kill one another. Without the spice trade, it is safe to say that the United States, as we know it, would be vastly different from what it is now. The money loaned to the United States, when we were a fledgling country, came from the wealthy spice merchants from what was considered one of the great hyperempires of the world, based in Amsterdam. But before we go to the birth of the United States, let me take you to the meatball.
Tea: The Drink That Built an Empire—and Helped Break One China had the tea. Britain had the appetite. John Hancock had a business to protect.
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I’ve been doing a series about foods that built civilizations. In this episode, we are talking about the potato. It is difficult to imagine that thousands of years ago, people constructed large buildings, managed rivers, built monuments, and created art. We have glimpses of these civilizations through stories, archaeology, and the structures they left behind, but much of their history has been lost. Imagine, we don’t even know where Cleopatra or Alexander the Great are buried, yet we know their stories. As European powers conquered Indigenous peoples, their languages, cultures, and oral traditions were suppressed. When a language disappears, so are the stories preserved within it. Our clues come from archaeology when we uncover a monument, a building, or an ancient settlement. In the Andes, the potatoes they cultivated were not the Russets, Yukon Golds, or fingerlings you find in the store today. Different colors, shapes, and textures. Adapted to survive the elevations, temperatures, and growing conditions. Biodiversity protected their food supply against frost, disease, and changing environmental conditions. If one variety failed, another might survive. The ancient wisdom of diversity that Andean farmers developed over thousands of years was lost when the potato eventually reached Ireland.
In our series about foods that built civilization, we talked a lot about grains, from wheat to corn to rice. Today, we are taking you to the ocean, with the civilizations that salmon built. From California to the interior of Alaska, salmon, a staple, allowed people to settle into villages, develop complex social networks, art, and trade routes. Those trade routes are as large as the ones in the Mediterranean. Some tribes built communal homes and developed complex art and language. Some were Seafaring tribes with canoes up to 60 feet long that traveled across oceans. All because there was a fish that would return in large numbers to streams and rivers, reliably, predictably. So predictable, the people could build their lives around salmon runs. So much so that some built a calendar not only with lunar cycles, but also with the return of the salmon. Civilizations have always gathered around food and water. The Mediterranean connected people who grew wheat and olives, giving people time to make wine, mine copper, build ships, trade with their neighbors, and occasionally go to war with them. Asia had rice and grain near the great river systems. The reliable calories from rice and grains allowed villages to become cities and to travel by water to trade. Today we are going to my home, from the Ventura River in California to my home state of Alaska.