Allison Aubrey

The U.S. Department of Agriculture has proposed new rules for school meals aimed at giving administrators more flexibility in what they serve in school cafeterias around the country each day.

If you've ever considered training for a marathon, but you're a bit intimidated by the idea of 26.2 miles, here's some motivation.

A slow and steady six-month training program designed to gradually build up endurance and mileage gave a group of novice runners, ages 21 to 69, an impressive boost to their heart health.

"What we found in this study is that we're able to reverse the processes of aging that occur in the [blood] vessels," says study author Dr. Anish Bhuva, a British Heart Foundation Cardiology Fellow at Barts Heart Centre in the United Kingdom.

More Americans are ordering more rounds, and that's leading to more funerals, according to a new study on alcohol-related deaths.

Looking at data from the National Center for Health Statistics, researchers estimate deaths from alcohol-related problems have more than doubled over the past nearly 20 years.

Death certificates spanning 2017 indicate nearly 73,000 people died in the U.S because of liver disease and other alcohol-related illnesses. That is up from just under 36,000 deaths in 1999.

Hunger once seemed like a simple problem. Around the globe, often in low-income countries, many people didn't get enough calories.

But increasingly, hunger exists side-by-side with obesity. Within the same community, some people are overweight while others don't have enough to eat.

And the tricky part: You can't "fix" hunger by just feeding people empty calories. You've got to nourish people with healthy, nutrient-dense foods, so they don't become obese.

The extreme cases of lung injury caused by vaping have raised awareness of the potential harms of electronic cigarettes.

Since the Centers for Disease Control and Prevention began tracking the problem last March, there have been 52 confirmed deaths and about 2,400 hospitalizations.

This story was produced as part of a collaboration with the PBS NewsHour

As the season of big holiday meals kicks off, it's as good a time as any to reflect on just how much food goes to waste.

If you piled up all the food that's not eaten over the course of a year in the U.S., it would be enough to fill a skyscraper in Chicago about 44 times, according to an estimate from the U.S. Department of Agriculture.

It's long been known that eating fish — especially cold-water fish such as salmon that are rich in omega-3 fatty acids — is good for heart health.

But, for the millions of Americans who are at high risk of heart disease, eating enough fish to make a difference isn't likely to be realistic for most.

There's new evidence that mind-body interventions can help reduce pain in people who have been taking prescription opioids — and lead to reductions in the drug's dose.

In a study published this month in JAMA Internal Medicine, researchers reviewed evidence from 60 studies that included about 6,400 participants. They evaluated a range of strategies, including meditation, guided imagery, hypnosis and cognitive behavioral therapy.

Officials at the Centers for Disease Control and Prevention say there has been a breakthrough in the investigation into the outbreak of vaping-related lung injuries that has led to the deaths of 39 people and sickened more than 2,000 others.

Investigators announced Friday that they have detected a chemical compound called vitamin E acetate in all the samples of lung fluid collected from 29 patients who were hospitalized after vaping, suggesting a possible culprit for the spate of lung injuries that has swept across the U.S.

E-cigarette maker Juul Labs announced Thursday it will suspend sales of most of its flavored products, including mango, fruit and cucumber. These types of flavors are considered an on-ramp to vaping for teenagers.

The move comes as the industry faces immense scrutiny. Several states have instituted bans on flavored products, and the Trump administration has signaled that a federal ban may be in the works.

There's fresh evidence that eating a healthy diet, one that includes plenty of fruits and vegetables and limits highly processed foods, can help reduce symptoms of depression.

Piper Johnson was all packed and ready to drive across country with her mom to start college when the 18-year-old noticed a pain in her chest. She took an Advil and hoped the pain would go away.

It didn't. During the drive from her hometown of New Lenox, Ill., near Chicago, to the University of Northern Colorado in Greeley, Colo., she realized something was very wrong. "I kept feeling worse and worse," Johnson says. She developed a high fever, felt extremely lethargic, and noticed a rapid heart beat.

The condition strikes young children. It can start with run-of-the-mill virus symptoms, like fever or sniffles. But, then the kids lose control of their limbs, may have trouble swallowing or breathing, or even end up paralyzed. This terrifying experience happened to more than 570 families since 2014, whose children were struck with an illness called acute flaccid myelitis, or AFM.

The Centers for Disease Control and Prevention intensified its warnings about the risks of vaping, as the number of patients with vaping-related illness continues to climb.

The case count has reached 1,080, the agency announced Thursday. There have been 18 deaths in 15 states, and more deaths are being investigated. All patients reported a history of vaping, and the majority reported using THC-containing products.

A new set of analyses published Monday in the Annals of Internal Medicine challenges the widespread recommendations to cut back on red and processed meats.

The mystery of the outbreak of vaping-related lung illnesses is still not solved.

But investigators in Illinois and Wisconsin have found some clues, they announced Friday in a press briefing.

Investigators in these two states conducted detailed interviews with 86 patients — mostly young men — and 66% said they had vaped THC products labeled as Dank Vapes. THC is the psychoactive ingredient in cannabis.

What are Dank Vapes and how could they be fueling the outbreak?

A top official with the Centers for Disease Control and Prevention warned federal lawmakers Tuesday that a new generation of e-cigarettes now on the market is "even more addictive," than early versions of vapes, and the number of vaping-related lung diseases is continuing to rise.