Show Notes
The Mitochondria Problem: Why These Tiny Powerhouses Shape How We Age Many people suddenly talk about mitochondria. You hear them in political speeches, on podcasts, and across social media. RFK Jr said he can “see” kids with weak mitochondria just by watching them walk through an airport. Others claim special diets or powders can “fix” aging by supercharging these organelles. However, most of that chatter misses the actual science. This post breaks down what mitochondria do, why they matter for aging, and how you can keep them healthy. No hype. No detox teas. Just biology you can use. What Are Mitochondria? Every cell in your body contains tiny structures called mitochondria. They act like miniature cells living inside your larger cells. Each mitochondrion even has its own DNA. Mitochondria divide independently from your regular cells. They manage your energy, converting glucose to ATP Finally, mitochondria keep your organs working. You inherit all your mitochondria from your mother, which is why scientists use mitochondrial DNA to trace ancestry.
How Did We Get Mitochondria? (A Very Old Story) About 1.5 billion years ago, a simple cell swallowed a bacterium and refused to digest it. Instead, they formed a partnership. The bacterium supplied energy. The host cell provided safety. That partnership became the mitochondrion. Every person alive today runs on that ancient deal.
What Do Mitochondria Do All Day? Mitochondria take glucose from your food and convert it into ATP — the energy your body uses to move, think, heal, and grow. This process runs every second of your life. You cannot swallow ATP and get more energy. ATP supplements don’t work. Only your mitochondria make the usable fuel your body needs.
Why Young Mitochondria Work So Well Young mitochondria act like teenagers. They run fast, bounce back quickly, and handle stress with ease. Cells constantly recycle old mitochondria through a process called mitophagy. This system works beautifully in childhood. Fresh mitochondria power: strong muscles sharp thinking fast recovery healthy metabolism
When mitophagy runs smoothly, you feel energetic and resilient.
What Happens When Mitochondria Age Aging slows everything down. Mitochondria begin to leak more “exhaust,” build up mutations, and lose efficiency. Damaged ones don’t get removed as well, because mitophagy weakens with age. Unfortunately, mitochondria do something worse than slow down: They fuse with healthy mitochondria. Imagine pouring spoiled milk into a fresh gallon. The whole jug goes bad. Aging mitochondria do the same thing inside your cells. They spread dysfunction to the healthy ones.
How Aging Mitochondria Cause Trouble As mitochondria fail, they change how cells function. They send distress signals back to the nucleus that alter gene expression. These messages push cells toward inflammation, stress, and survival pathways that your body normally keeps quiet. Even more concerning, changes in mitochondrial shape — too much splitting (fission) and not enough merging (fusion) — appear in both aging and cancer. These shifts support tumor growth, help cancer cells spread, and make some treatments less effective. Aging mitochondria increase the risk of: brain fog muscle fatigue slower recovery heart strain metabolic slowdown cancer-friendly environments
Mitochondria sit at the center of how we age.
Why “Mitochondrial Booster” Supplements Miss the Mark Plenty of supplements promise to “repair” mitochondria. Many sound exciting: NAD boosters Urolithin A peptides antioxidant stacks
However, evidence in actual humans remains limited. NAD boosters don’t show meaningful anti-aging benefits. Urolithin A can help with muscle endurance, but doesn’t reverse aging. Antioxidant megadoses may even interfere with exercise benefits. People want a miracle switch. We don’t have one.
What Does Improve Mitochondrial Health Good news: the basics still win. And they outperform supplements every time. 1. Resistance Training Your
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.
MesoAmerica and Chocolate In our series looking at foods that built civilizations, today we are going to stay in the Americas with chocolate. Chocolate has been used as currency, consumed by kings, incorporated into religious ceremonies, and prescribed as medicine. Today, it is a multibillion-dollar industry that wants you to believe that eating chocolate is an act of preventive cardiology. I mean, why not? They convinced us to give chocolate to people we love, eat it when we are happy, when we are sad, when only the dog understands us. Don’t feed chocolate to your dog. And we have done all this with a bitter seed that most of us would probably spit out if we tasted it straight from the tree.
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.