National Geographic | Mind, Body, Wonder

This week: How man's best friend could help us live longer; the 6 indicators of good health; a new piece to the long COVID puzzle; fruits and veggies have been losing nutrients for decades; how to tell if you have seasonal depression; the right way to dispose of old medications.

PHOTOGRAPH BY BECKY HALE

Could man's best friend be our best hope to reverse aging in humans?

The good boy in this picture is named Ace. He has a bad heart, as do many other Cavalier King Charles Spaniels. An experimental drug he's taking could make his heart young again—and, scientists hope, it could help crack the code on how to reverse aging in humans.

PHOTOGRAPH BY DAVID GUTTENFELDER

Can aging be 'cured'? Scientists are trying.

It's not just about extending life—it's about getting more of us into our 90s without the aches and ailments that can make those years a mixed blessing.

CUTTING-EDGE SCIENCE

Read more on the quest for longevity:

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Want to live longer? Focus on these 6 things

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This American diet could add 10 years to your life

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Can fasting help you live longer? Here's what the science says

MICROGRAPH BY ANNE WESTON/EM STP, THE FRANCIS CRICK INSTITUTE, SCIENCE PHOTO LIBRARY

The answer to the long COVID puzzle could lie in your blood vessels

Scientists have struggled to explain why millions of people across the world experience lingering symptoms from COVID-19, despite recovering from their initial infection. Promising research points to microclots—clots in the smallest blood vessels—which might help explain the condition’s debilitating symptoms.

HOW TO TREAT MICROCLOTS

HAD COVID-19 MORE THAN ONCE? Here’s how multiple infections can harm the body. +

A PROBLEM WITH 'WHOLE' FOODS

PHOTOGRAPH BY LUCAS FOGLIA

Fruits and vegetables are less nutritious than they used to be: Multiple scientific studies show that many crops grown today carry less protein, calcium, phosphorus, iron, riboflavin, and vitamin C than those that were grown decades ago. What does this mean for people on plant-based diets?

A LOOMING THREAT TO PUBLIC HEALTH

Foods for health:

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The surprising ways mushrooms boost human health

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Is algae the new kale? "It tastes like bacon."

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Onions are fine-tuned fighting machines. Here's what they can do for you.

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This is why you should start eating sea urchins.

GOT THE WINTER BLUES?

PHOTO ILLUSTRATION BY CHRIS FERTNIG, GETTY IMAGES

You might have SAD, or seasonal affective disorder: Also known as seasonal depression, it can occur in both winter and summer. Here are the signs to watch for, why it happens, and the treatments that might help.

A BAD MOOD VS. A SAD MOOD

COULD COVID-19 TRIGGER DEPRESSION? Experts say yes—but not for the reasons you might expect. +

HEALTH NEWS YOU MIGHT HAVE MISSED

PHOTOGRAPH BY BEN MCCANNA, PORTLAND PORTLAND PRESS HERALD/GETTY IMAGES

How should you dispose of unused or expired medications? Most people have no clue, and pill hoarding is a common outcome. Many of us eventually toss these drugs into household trash or flush them down the toilet or sink—none of which may be a good idea.

SAFER SOLUTIONS

SPEAKING OF DISPOSAL: Here's a better to get rid of used cooking oil. +

COVID in the U.S.: Are we shifting to a single shot?

Could this be the solution to chronic pain—and the opioid crisis?

Can fasting help you live longer? Here’s what the science says.

Feeling sick? Here’s how different cold and flu drugs work

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