24 July 2015, 08:30 AM ET
Have you ever toked up? Sparked a spliff? Smoked weed? If you have, you're not alone — 44 percent of all Americans surveyed in a new Gallup poll say they've tried marijuana.
23 July 2015, 04:10 PM ET
Caitlyn Jenner's public transition from man to woman has raised awareness about hormone therapy for transgender people. What makes transgender youth identify with a gender they weren't assigned at birth isn't about having too many of the "wrong" hormones.
23 July 2015, 01:00 PM ET
A teenager in Colorado died after consuming an entire marijuana cookie that contained 6 servings of marijuana's active ingredient, tetrahydrocannabinol (THC), according to a new report.
23 July 2015, 11:08 AM ET
The MH17 crash temporarily increased depression symptoms among pregnant women in the Netherlands, where many of the plane's passengers lived.
23 July 2015, 02:22 AM ET
Bacteria are microscopic single-celled organisms that can be helpful, such as those that live in our guts, or harmful, such as flesh-eating bacteria.
23 July 2015, 02:10 AM ET
Vitamin B5, also called pantothenic acid and pantothenate, is vital to living a healthy life. Like all B vitamins, it helps the body turn food into energy.
22 July 2015, 03:06 PM ET
A mountain biker in New Mexico was lucky not to sustain a serious injury after he fell off his bike and had a wooden branch penetrate his neck, his doctors say.
22 July 2015, 02:00 PM ET
Antibiotic-resistant bacteria may be tougher superbugs than previously thought: Not only are these bacteria harder to treat, they appear to be "fitter" in general.
22 July 2015, 01:21 PM ET
Eyedrops can shrink cataracts in dogs, which may prove a first step toward a drug that can treat or even prevent cataracts in human eyes, researchers say.
22 July 2015, 12:10 PM ET
West Coasters watch out: You might be at greater risk of contracting West Nile virus than those in wetter parts of the U.S.
22 July 2015, 08:05 AM ET
The percentage of teen girls who use emergency contraception, sometimes referred to as the "morning-after pill," has increased considerably over the last decade, according to a new report.
22 July 2015, 02:23 AM ET
Almonds, the most popular nut in the United States, is full of nutrients and may promote heart healthiness.
21 July 2015, 12:22 PM ET
Animal testing of a new flu vaccine finds that the cocktail protects against influenza strains not included in the original mix. Clinical trials could begin in about a year, the researchers say.
21 July 2015, 11:48 AM ET
Elderly women are more likely than elderly men to develop Alzheimer's disease, even when they are exposed to some of the same risk factors, two new studies find.
21 July 2015, 06:00 AM ET
Men may gain a few pounds after they become fathers, while their childless counterparts actually lose weight in early adulthood, according to a new study.
20 July 2015, 10:52 PM ET
Tramadol is a prescription medication used to treat pain.
20 July 2015, 03:51 PM ET
Many people with chronic pain aren't telling their primary doctors about their use of alternative therapies such as acupuncture and chiropractic work, a new study suggests.
20 July 2015, 11:54 AM ET
Small, discreet and Bluetooth-enabled, the new generation of hearing aids look more like something out of a spy movie than a doctor's office.
20 July 2015, 09:30 AM ET
As the baby boomers get older, the rates of Alzheimer's disease among the people of this generation will climb considerably, according to a new study.
17 July 2015, 02:45 PM ET
Planned Parenthood denies recent allegations that the organization profits from fetal tissue donation. But what exactly is fetal tissue used for in medical research, and what are the ethical issues surrounding its use?
16 July 2015, 04:44 PM ET
People raising backyard chickens should know not to cuddle or kiss the birds, to avoid the risk of Salmonella, according to the CDC.
16 July 2015, 01:36 PM ET
Tracking your heart rate can put you more in touch with your stress levels, a new study suggests.
16 July 2015, 12:46 PM ET
16 July 2015, 12:46 PM ET
Young American women commonly smoke, but only very lightly, or they smoke on some days but not others, a new study finds.
15 July 2015, 08:12 PM ET
A gene treatment that targets the retinas of the eyes and can restore vision to some people who are blind actually affects not only their eyes, but also their brains, a new study shows.
15 July 2015, 03:10 PM ET
The way you use your smartphone may reveal if you are depressed, a new study suggests.
15 July 2015, 11:52 AM ET
Women who spend a lot of time sitting may be at increased risk for certain types of cancer, a new study finds.
15 July 2015, 11:09 AM ET
The vast majority of women who have had an abortion don't regret it, a new study finds.
14 July 2015, 08:00 PM ET
Chemicals called phthalates, which may be harmful to health, are found at higher levels in women who use douches, a new study finds.
14 July 2015, 06:30 PM ET
Although some people say homeopathy is safe and leads to better outcomes when used along with conventional medicine, others say it can be harmful, and it is unethical for doctors to recommend it.
14 July 2015, 03:02 PM ET
Researchers have made "mini hearts" — structures that resemble tiny, primitive, beating hearts — from stem cells.
14 July 2015, 12:59 PM ET
Getting into a regular exercise routine can be difficult, but now researchers have discovered a trick that can make it easier.