Keith & Kathy's Corner

If you or someone you know is taking a GLP-1 medication, there's a new side effect worth watching for — and it may be hiding in plain sight.

Millions of women are now taking GLP-1 receptor agonist drugs like semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) for weight loss or blood sugar control. The benefits are well-documented. But a growing body of reports is flagging a surprising and largely overlooked side effect: significant changes to the nails. Research suggests it may be happening in close to half of users.

Something is shifting in how men think about mental health — and the research backs it up.

For decades, the message men got was simple: push through it. But a growing number of men in their 30s and 40s are quietly rewriting that script — and the data suggests it may be one of the smartest health moves they can make.

High blood pressure used to be considered an older man's problem. New data says that thinking is dangerously out of date.

If you're a man in your 30s or 40s and you haven't had your blood pressure checked lately, this is your wake-up call. Hypertension — long thought of as something that crept up on men in their 60s — is now being diagnosed in younger men at rates that have public health experts paying close attention. Here's what the research shows and what you can do about it today.

Your standard cholesterol test may be missing one of the most important clues about your heart health.

Most men walk out of their annual physical thinking they know where they stand on heart health. You got your cholesterol checked, the numbers looked fine, and your doctor said see you next year. But here's what that routine panel may not be telling you: a growing body of research suggests that a marker called ApoB could be a more precise predictor of cardiovascular risk — and most men have never even heard of it.

The supplement aisle can feel overwhelming — here's what the science actually says about what men need after 40.

Walk into any pharmacy and the men's health supplement section looks like a college chemistry lab. Hundreds of bottles, each promising to boost energy, sharpen your mind, build muscle, or protect your heart. But most men over 40 are either taking too much of the wrong things or skipping the few that genuinely matter. Here's how to cut through the noise.

Cold plunges are all over social media, but does the science back up the buzz—or is this just another wellness trend?

Every guy at the gym seems to be talking about ice baths. Some swear they speed up recovery, boost testosterone, and sharpen the mind. But before you fill your bathtub with ice, it's worth asking: what does the research actually say—and what's still just hype?

Most people don't notice they're losing muscle until it's already affecting how they feel, move, and live — but there's a lot you can do about it.

You might be eating well, staying active, and feeling pretty good. But starting in your 30s, your body quietly begins losing muscle mass — and the process picks up speed after 60. Scientists call it sarcopenia, and it's one of the most underappreciated threats to healthy aging. The good news: it's not inevitable.

It's not just an older man's problem anymore — and the reasons why may surprise you.

Most people assume erectile dysfunction is something that creeps up in your 60s or 70s. But researchers and urologists are seeing a different story unfold, and it starts much earlier. Here's what the science says about why ED is rising in younger men, and what can actually be done about it.

You don't need a hour at the gym to make a real difference — scattered five-minute bursts of movement may add up to serious health gains.

Most of us were taught that a workout has to be long to count. But a growing body of research is challenging that assumption, and the findings could change the way you think about fitness entirely. So-called "exercise snacking" — brief, informal bouts of movement sprinkled throughout the day — is showing real promise for improving cardiovascular health, blood sugar control, and muscle strength, especially for people who can't carve out a dedicated gym block.

Forget cholesterol for a moment. One fitness measurement may be the strongest predictor of how long you'll live — and most people have never even heard of it.

It's called VO2 max, and researchers say it may tell you more about your future health than your blood pressure, your BMI, or your resting heart rate. Here's what it is, why it matters more after 50, and what you can actually do about it.

The right movements can strengthen the muscles around your knees and help you stay active for decades to come.

Many people assume that achy knees are just an inevitable part of getting older — so they stop moving. But here's what the research actually shows: the right kind of exercise doesn't wear your knees down. It builds them up. In fact, staying sedentary may be one of the worst things you can do for long-term knee health.

Research suggests the pace at which you walk may reveal more about your long-term health than you ever expected.

You probably think of walking speed as something that just happens — fast when you're late, slow when you're relaxed. But scientists are finding that how quickly you naturally move through the world may be one of the most telling signs of how well your body is aging. Here's what the research says, and what you can actually do about it.

Research suggests that what you eat while taking antibiotics may matter just as much as the medication itself — and sugar could be making things worse.

Most people know antibiotics can upset your stomach. But new research suggests that eating sugar while you're on a course of antibiotics may deepen the damage to your gut microbiome — the trillions of bacteria that keep your digestion, immunity, and even your mood running smoothly. Here's what the science says and what you can do about it right now.

A new study tracked what happens inside the body during a full week without food — and the findings go far deeper than weight loss.

Most people think of fasting as a weight-loss tool, a quick reset, or something monks do. But researchers have now mapped, in remarkable molecular detail, what actually happens inside the human body when someone goes seven full days without eating. The results are surprising — and they raise new questions about what fasting can and cannot do for long-term health.

Most Americans fall far short of their daily fiber needs — and their bodies are paying the price. Here's what the science says happens when you start closing that gap.

You've probably heard that fiber is good for you. But do you know what it actually does inside your body — and how fast it starts working? The answer might surprise you. Changes can begin within days, not months.