Allison Aubrey

A new study published in The BMJ can't tell you exactly how much red meat is OK to eat to maintain good health or prevent disease.

But it does help sort out a big-picture, and perhaps more important, question: What does a healthy pattern of eating look like?

The U.S. Preventive Services Task Force has a new recommendation aimed at preventing HIV infections and AIDS. The influential panel's guidance says people at high risk of being infected with HIV should be offered preventive antiretroviral medications — taken in a daily pill.

There's lots of evidence that preexposure prophylaxis — also known as PrEP — is effective. The Food and Drug Administration-approved pill Truvada contains two antiretroviral medicines (tenofovir and emtricitabine).

The Food and Drug Administration is holding its first public hearing on CBD, the cannabis extract that has quickly grown into a billion-dollar industry. Today's hearing will help officials determine how to regulate CBD products.

The compound can be extracted from marijuana or from hemp. It's promoted as a way to ease anxiety and inflammation – and it doesn't get people high because it doesn't contain THC, the psychoactive component of the cannabis plant.

There's nothing magical about the number 10,000.

In fact, the idea of walking at least 10,000 steps a day for health goes back decades to a marketing campaign launched in Japan to promote a pedometer. And, in subsequent years, it was adopted in the U.S. as a goal to promote good health. It's often the default setting on fitness trackers, but what's it really based on?

"The original basis of the number was not scientifically determined," says researcher I-Min Lee of Brigham and Women's Hospital.

The Food and Drug Administration sent a letter to the food industry on Thursday, urging companies to get behind the initiative to standardize the use of the phrase "best if used by" on packaged food labels.

"A Low-Fat Diet Helps Reduce The Risk of Death From Breast Cancer." Did a headline like this catch your eye this week?

Dozens of news organizations, including NPR, reported on a new study that found that a low-fat diet helped women reduce their risk of dying from breast cancer.

Almost everyone gossips.

And a new study finds that people spend about 52 minutes per day, on average, talking to someone about someone else who is not present.

But here's the surprise: Despite the assumption that most gossip is trash talk, the study finds that the vast majority of gossip is nonjudgmental chitchat.

Feel like you're living under a rain cloud? Life not going your way? Lots of us have a bit of Eeyore's angst and gloom.

But here's the good news (sorry to be so cheery): You can be taught to have a more positive attitude. And — if you work at it — a positive outlook can lead to less anxiety and depression.

Measles is on the rise again, all around the globe.

Though the number of people affected in the U.S. is still relatively low compared with the countries hardest hit, there are a record number of U.S. measles cases — more than 700, so far, in 2019, according to the CDC — the highest since the disease was eliminated in the U.S. back in 2000.

An estimated 40% of adults in the U.S. snore. And, men, you tend to out-snore women. (Yes, this may explain why you get kicked or shoved at night!)

And despite the myth that snoring is a sign of deep sleep, there's really no upside to it.

Work Stress. Home Stress. Financial Stress.

The toll of chronic stress isn't limited to emotional suffering. High stress can set the stage for heart disease.

In fact, research shows that those of us who perceive a lot of stress in our lives are at higher risk of heart attacks and other cardiovascular problems over the long term.

Sneezing, runny nose, congestion, or irritated eyes? Yes, we hear you: The misery of seasonal allergies is real. A lot of people find temporary relief with over-the-counter medications, but these don't treat the cause.

As we head into grass pollen season over the next few months, here's an option to consider: Many allergists now prescribe immunotherapy tablets, which work in the same way as allergy shots, to some of their patients with grass allergies.

A coalition of state attorneys general is suing the Trump administration for weakening the federal nutrition standards for school meals that are fed to about 30 million children across the country.

About 11 million deaths a year are linked to poor diet around the globe.

What's driving this? As a planet we don't eat enough healthy foods including whole grains, nuts, seeds, fruits and vegetables. At the same time, we consume too many sugary drinks, too much salt and too much processed meat.

It's long been known that air pollution influences the risk — and severity — of asthma. Now, there's emerging evidence that diet can play a role, too.

Editor's note: If you like this article, you should check out Life Kit, NPR's family of podcasts for navigating your life — everything from finances to diet and exercise to raising kids. Our new sleep guide is out Monday. Sign up for the newsletter, or email us at lifekit@npr.org.

Eggs have made a big comeback. Americans now consume an estimated 280 eggs per person per year, according to the U.S. Department of Agriculture. And that's a significant increase compared with a decade ago.

Even if you're not aware of it, it's likely that your emotions will influence someone around you today.

This can happen during our most basic exchanges, say on your commute to work. "If someone smiles at you, you smile back at them," says sociologist Nicholas Christakis of Yale University. "That's a very fleeting contagion of emotion from one person to another."

The consumer-advocacy organization Consumer Reports tested 45 fruit juices, including apple, grape and juice blends, and found that 21 of them had "concerning levels" of cadmium, arsenic and/or lead, according to a new report. Juice samples came from 24 national and private-label brands.

If you like this article, check out Life Kit, NPR's family of podcasts for navigating your life — everything from finances to diet and exercise to raising kids. Sign up for the newsletter to learn more and follow @NPRLifeKit on Twitter.

It's trendy to go low-carb these days, even no carb. And, yes, this can lead to quick weight loss.

School lunches are healthier than they were five years ago. But Agriculture Secretary Sonny Perdue says schools need more flexibility in serving meals that kids will eat.

"If kids are not eating what is being served, they are not benefiting, and food is being wasted," Perdue said in a statement announcing a rule that is set to be published later this month.

You've likely heard the idea that sitting is the new smoking.

Compared with 1960, workers in the U.S. burn about 140 fewer calories, on average, per day due to our sedentary office jobs. And, while it's true that sitting for prolonged periods is bad for your health, the good news is that we can offset the damage by adding more physical activity to our days.

When it comes to turning back the clocks on our devices, technology has us covered. Our smartphones automatically adjust.

But our internal clocks aren't as easy to re-program. And this means that the time shift in the fall and again in the spring can influence our health in unexpected ways.

If you peer into Americans' grocery carts, you're unlikely to see a mix of foods and beverages that make for an ideal diet. And this is true for many of the nearly 42 million people who receive food stamps, too.

Ever heard of these food additives? Synthetically-derived benzophenone, ethyl acrylate, methyl eugenol, myrcene, pulegone, or pyridine?

These compounds can help mimic natural flavors and are used to infuse foods with mint, cinnamon and other flavors.

You've likely never seen them on food labels because food manufacturers are permitted to label them simply as "artificial flavors."

There are a lot of misconceptions out there about the flu shot.

But following a winter in which more than 80,000 people died from flu-related illnesses in the U.S. — the highest death toll in more than 40 years — infectious disease experts are ramping up efforts to get the word out.

There's a lot of talk about how to make our food supply more sustainable. And, increasingly, eaters connect the dots between a healthy diet and a healthy planet. One line of evidence? A shift on grocery store shelves.