Allison Aubrey

Dehydration has long been known to slow physical performance. Now there's evidence that too little water can hurt cognitive performance, too, making complex thinking tasks harder.

Hot weather can influence cognitive performance, according to new research. Young adults living in non-air-conditioned dorms during a heat wave performed worse on math and attention tests.

Just in time for summer hikes and outdoor play, a study finds that the ticks that often convey Lyme disease become unable to bite, and soon die, after exposure to clothing treated with permethrin.

The latest study to link coffee and longevity adds to a growing body of evidence that, far from a vice, the brew can be protective of good health.

For the first time, the FDA has approved a drug containing CBD, an extract of marijuana. This move could pave the way for more research into medical uses for the marijuana extract.

If you are bitten by a Lone Star tick, you could develop an unusual allergy to red meat. And as this tick's territory spreads beyond the Southeast, the allergy seems to be spreading with it.

A study finds light drinkers have the lowest combined risk of getting cancer and dying prematurely — lower than nondrinkers. Alcohol is estimated to be the third-largest contributor to cancer deaths.

There's a controversy over how to label the sugar naturally found in maple syrup. The Food and Drug Administration says it should be labeled as "added sugar." Maple syrup producers are balking.

Depression is a possible side effect of 200 medications. Now, a new study finds people who take these drugs are, in fact, more likely to be depressed. The more drugs you take, the higher the risk.

Part of a parent's job is to help kids do their best, but pushing too hard can backfire. Research shows kids in high-achieving communities are at higher risk of anxiety, depression and substance use.

The romaine that sickened 172 people in 32 states came from Yuma, Ariz., and is likely completely gone from the food supply. What's now for sale is from California.

The uptick is new after a multi-year sales slump. Among the benefits of frozen produce: it packs as much nutrition as fresh, but with less waste if you don't eat it right away.

The beverage industry is challenging a 1.5 cent per ounce tax on sweetened drinks imposed in Philadelphia. Officials argue the tax is a good strategy to help combat childhood obesity.

Starting Monday, all restaurant chains with 20 or more locations must post calorie counts on menus. Research suggests this information helps diners cut back on calories in small ways that add up.

The tick-borne illness is spreading north and south — about 300,000 U.S. cases a year. As scientists work on better diagnostic tests and surveillance tools, you can take steps to cut your risk.

Sales of probiotics are soaring. While some studies on this beneficial bacteria show it can treat specific health issues in children, scientists are exploring how it may help gut health more broadly.

An FDA advisory committee last week urged approval of a drug containing cannabidiol to treat a form of epilepsy. Other scientists wonder if CBD might ease anxiety or other disorders, too.

After reviewing the medical evidence, the U.S. Preventive Services Task Force recommended exercise as the most effective approach for older people seeking to minimize the risk of falling.

A new study suggests that residents of Philadelphia are 40 percent less likely to drink sweetened beverages daily compared with people in cities that don't have a soda tax in place.

There's evidence that if you regularly bike — even just for fun — you may age better than those who don't. A study shows that cyclists bodies may fend off some of the typical age-related decline.