Longevity.
In your ears.

Ask almost anyone what a stem cell injection does and you will get the same picture. The cells go in, they travel to the damaged knee, they recognize what is broken, and they become new tissue in place of what was lost. It is a clean and satisfying story. As far as the evidence takes us, it is mostly wrong. Not wrong because these cells do nothing. Wrong because the mechanism is a different one, and the real mechanism is more interesting. Most of the cells administered are cleared within days, and the few that remain are far too few to account for what patients experience. What the evidence points to instead is signaling. These cells release growth factors and instructions that quiet inflammation and shift the tissue around them toward repair. Less like a replacement part. More like a temporary instruction that the body then acts on, or does not. That changes what you should expect, how long to wait before calling something a failure, and which claims should make you cautious. I explain all of it plainly in my new article. Come and read it.

I get asked about peptides in exam rooms. Also in hotel lobbies at conferences, by physicians deciding whether they should be treating with them. And across dinner tables, by people who heard something on a podcast and cannot tell science from advertisement. Since the advisory committee vote in late July, the volume has roughly tripled. The questions have not changed at all. It is the same five, in almost the same words. What actually is a peptide. Are they drugs. Why is the same compound legal in one form and not another. What would I want to know before starting anything. And the one everybody asks and almost nobody gets a straight answer to. They are natural, so they are safe, right? Here is the beginning of it. Your body already makes it is a true sentence, and it is not a safety argument. Safety belongs to a specific compound, from a specific source, at a specific dose, in a specific person. That last one is where nearly all the real work happens. I answer all five, plainly, in my new article.

Peptides are everywhere. Ozempic, longevity compounds, the weight-loss shots everyone is on. But almost no one can answer the simplest question underneath it all. What actually is a peptide? Last week I sat in a room outside Washington while a federal advisory committee spent two days weighing how patients can access these therapies. It was one of the more fascinating meetings of my career, and it made one thing clear. The science is moving faster than the clinic, the classroom, or the news can keep up with. Here is what matters. A peptide is simply a short chain of amino acids, a messenger your body already makes. But making it yourself is not the same as taking more on a schedule. Which is why the useful question is never whether peptides are safe. It is whether this one is safe for you, given your history, your other medicines, and what you are treating. The committee voted to recommend easing access to six of them. But a promising early finding is not the same as a settled fact. I break it all down, plainly, in my new article. Come read it, and make sense of the mania for yourself.

Something shifted in my exam room this year. Patients used to ask me how to fix a problem. Now they ask how to stay ahead of it, how to know what is breaking down before it breaks. That is a different conversation, and it tells me the science of aging is finally reaching real people. The words are changing too. Not anti-aging, not even longevity, but healthspan. The years you spend actually feeling good, not just alive. And here is what I find genuinely exciting. A 2024 study in Nature showed that blocking a single protein extended lifespan in mice by about 25 percent. Alphabet's Calico was convinced enough to spend up to 596 million dollars on it. That therapy has already cleared its first human trial. These are not miracle cures. We are still early, and the honest results are measured, not magical. I walk through all five trends I am watching this year, in the article below.

Imagine living with Type 1 diabetes for years, and then going more than a year with no insulin injections at all. Not because of a new drug, but because your body started making its own insulin again. Type 1 diabetes happens when the immune system destroys the beta cells in the pancreas, the cells that produce insulin. For most patients, the only answer has been to replace that insulin from the outside, every day, for life. Even the best pumps and monitors cannot match the second-to-second control of healthy cells. So here is what stopped me. Researchers took one woman's own blood cells, reprogrammed them into insulin-producing cells, and transplanted them back. Within months they switched on. Her insulin needs fell, and eventually she needed none at all. The results were published in Nature in 2025. But this is a single patient, not a cure yet. The same immune attack that caused the disease could, in time, return. I break down how it works, the honest risks, and what it means for you, in the article below.

For more than two decades, women were warned that hormone therapy raised their risk of breast cancer and heart disease. Now the Food and Drug Administration is preparing to revise those very warnings. So what changed? The warnings came from a landmark 2002 study, the Women's Health Initiative, which was stopped early when it found real harm. But that study enrolled women with an average age of 63, many more than a decade past menopause. It asked whether hormones could prevent disease in older women. It never really tested the women who actually seek treatment. And here is the part that surprised me. When hormone therapy begins within 10 years of menopause, or before age 60, the evidence points the other way. A review of 19 trials linked early treatment to lower cardiovascular and overall mortality, with no rise in heart disease. Timing is not a small detail here. The same therapy can carry a very different risk depending on when it begins. I walk through what the evidence actually shows, and what it means for you, in the article below.

What if type 2 diabetes was not a life sentence? What if, for many people, it could actually be reversed? For years we have treated type 2 diabetes as a chronic, progressive disease, something you manage with medication for the rest of your life. But that framing may miss the root cause. The real driver is insulin resistance, and medication controls the blood sugar without truly fixing what feeds it. So here is the finding that caught my attention. In a study led by Dr. Sara Halberg, a carefully structured low-carbohydrate, higher-fat diet produced a 60% reversal rate. By cutting the carbohydrates, the body shifts from burning glucose to burning fat for fuel, and insulin sensitivity improves. This is not a quick fix. It takes a structured plan and real support, and it does not work for everyone. I break down how the approach works, the evidence behind it, and what it means for you, in the article below.

What if the biggest changes in medicine over the next decade are not new drugs, but a completely different way of thinking about healing? Across five different fronts, medicine is being quietly reimagined. From how we prevent chronic disease, to how we treat mental illness, the old model of a daily pill for every problem is starting to give way to something more fundamental. Take the return of psychedelic medicine. Compounds like psilocybin appear to boost neuroplasticity, the brain's ability to form new connections. Paired with professional therapy, they are showing real promise for conditions that have long resisted treatment, a sharp departure from drugs you simply take every day. These approaches are still early, and none of them replace careful, evidence-based care. The science here is promising, not settled. I walk through all five shifts, what the evidence shows, and what they could mean for you, in the article below.