People who live past 110 carry far more of one rare killer immune cell. Here is what the new study found, what it proves, and what it quietly does not.
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How Ozempic Works in the Brain: Scientists Had It Backwards
A Yale study found how Ozempic works in the brain is the reverse of what scientists assumed: it turns the hunger neurons up, not off. Here is what changed.
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Depression and New Brain Cells: What Scientists Just Found
Depression and new brain cells: a Columbia study found neurogenesis stalls in depression — and the cells that stall are the ones that keep today from blurring.
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Shingles Vaccine and Dementia: What the Study Actually Found
A study of 509,926 older adults linked the shingles vaccine and dementia risk: 18.8% versus 24.6% over four years. What it found, and what it cannot say.
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How Long Do Medications Affect Your Gut Bacteria?
How long do medications affect gut bacteria? A study of 2,509 people found nearly half of 186 drugs left traces years after the last dose. Here is what that means.
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How Much Sleep Do You Need? A 500,000-Person Study Found the Answer Is a Range
How much sleep do you need? A study of 500,000 people found the sweet spot is a range — and that sleeping too much ages you almost as fast as too little.
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Gut Bacteria and Muscle Strength: What the 29% Finding Means
A study in Gut linked gut bacteria and muscle strength: older adults with one microbe had 29% stronger grip. Here is what it proves, and what it doesn’t.
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Quitting Alcohol Changes the Brain — and Not the Way Anyone Expected
A new study found quitting alcohol changes the brain in ways that can raise relapse risk. Here is what the research showed, and what it says about willpower.
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Yeast Beta-Glucan Retrained Immune Cells to Fight Cancer
Yeast beta-glucan retrained bone marrow stem cells in mice to fight three cancers — and the immune system half we called forgetful turned out to remember.
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More Than Half of People Who Try Legal Psilocybin Call It One of the Most Meaningful Experiences of Their Life
A landmark Oregon study found most people who try legal psilocybin call it a meaningful experience. Here’s what that search for meaning is really about.