Katherine Hobson

It's easy to think that artificial sweeteners are a health win. But a review of research finds that there's no evidence they help people lose weight, and they may be associated with other problems.

Updated guidelines on mammograms from the nation's gynecologists are intended to incorporate recommendations from three other medical societies and consider women's preferences, too.

Older kids should limit the amount of juice they drink too. Whole fruit is better than juice because it contains fiber, which slows the absorption of sugar and fills you up the way juice doesn't.

Babies in Native American and Alaska Native families are at higher risk of sudden unexplained infant death, despite years of effort to reduce the toll. African-American families also face higher risk.

A report on the potential influence of alcohol or drug impairment on traffic fatalities points to the difficulty of comparing alcohol impairment standards to other drugs.

Avoiding your phone and TV at night and setting a firm bedtime might solve your problem if you feel tired a lot. But fatigue can also be a sign of disease.

The study builds on previous evidence linking loneliness to more serious health problems, but the findings do not link the sheer size of a person's social network to cold symptom severity.

Women often worry that exercise is dangerous during pregnancy, but the data shows it's almost always good for both mother and the developing fetus. As with so many things, moderation is key.

The creators of the risk assessment score say they want to help primary care physicians better identify patients who need extra counseling and follow-up.

It's not clear whether spending a lot of time on Facebook, Snapchat or Instagram leads to social isolation, or whether the lonely seek solace in social media.

Getting people to change their health behaviors is hard. A cancer diagnosis may increase motivation to reduce risk, but it doesn't necessarily make the change easier.

In his new book, researcher Martin Gibala explains that workouts with periods of intense exercise aren't just for the super-fit. They also help make the most of limited workout time.

Girls are less likely to identify their own gender as brilliant than boys are, even at age 5. One question is whether it's the girls who need to change their thinking about innate intelligence.

Parents have to weigh a lot of factors in deciding whether their kid should get a sick day. But day care centers may make the decision for you — and their rules are not always evidence based.

Taking folic acid while pregnant reduces the risk of birth defects. But there may not be enough of the vitamin in enriched grain products, a federal advisory panel says.

Gratitude is linked to better physical and mental health. But some people are wired in a way that they place less value on it. And quickie exercises to boost gratefulness may not pay off.

Cutting by half the time that children are given antibiotics for ear infections didn't do as good a job, a study finds. And it didn't reduce antibiotic resistance, which was a key goal.

This study doesn't prove that optimism actually causes better health or postpones death. But it joins a growing body of evidence suggesting that they're fellow travelers.

It's true that the earlier a smoker quits the better, but even people who quit in their 60s lowered their risk of death compared to those who kept puffing away.

The death toll from pneumonia and other infectious diseases in the U.S. is much lower than it was 100 years ago, but new pathogens like the West Nile, dengue and Zika viruses pose challenges.