25 November 2014, 06:51 PM ET
In a rare case, researchers report that a 22-year-old woman in Brazil who tested positive for HIV likely contracted the virus by sharing manicure instruments with an HIV-infected cousin.
25 November 2014, 05:05 PM ET
The 650 muscles in the human body control movement and help to maintain posture, circulate blood and move substances throughout the body.
25 November 2014, 12:05 PM ET
A compound called berberine that is found in plants and some Chinese herbal medicines may trigger the body to burn calories, a new study in mice finds.
25 November 2014, 12:00 PM ET
From lowering blood pressure to relieving depression, expressing gratitude can be a powerful boost to health, experts say.
25 November 2014, 11:34 AM ET
People who stick to a vegan diet can face their turkey-eating family with a bit more confidence this Thanksgiving. Two new studies show why a plant-based diet is best for losing weight and lowering the risk of diabetes and heart disease.
25 November 2014, 07:08 AM ET
Growing evidence is showing that the diet trend of "intermittent fasting" -- which involves eating very few calories on some days, but not others -- may hold benefits for people who want to lose weight or prevent certain diseases, researchers say.
25 November 2014, 12:11 AM ET
A new app used by nurses in the operating room is bringing real-time status updates to anxious parents.
24 November 2014, 11:11 PM ET
From breakfast to booze, a few smart choices on Thanksgiving Day can help you get through the feast guilt-free.
24 November 2014, 06:06 PM ET
Juice cleanses are a popular trend, but following one may not be good for your health.
24 November 2014, 05:23 PM ET
Increasing demands for sustainability in farming salmon has led to replacing part of the fish diet with vegetable oil. The result is salmon that has lower content of omega-3 fatty acids. Is the new salmon still as beneficial for people to eat?
24 November 2014, 04:43 PM ET
The hectic pace of modern life means that people are often eating at odd times of the day and night, and these shifted schedules could be taking a toll on memory, new research suggests.
24 November 2014, 10:44 AM ET
A biologist and a photographer were working in the Sri Lankan rainforest when they inadvertently captured a rare sight on camera: the moment that a venomous snake struck, striking the biologist on the hand.
22 November 2014, 01:19 AM ET
Why U.S. agencies need to look more closely at the genetically engineered "Arctic" apple.
21 November 2014, 06:11 PM ET
InsideTracker is a service that analyzes your blood for various biomarkers to see if your levels are in the "optimal" zones. But critics are skeptical this can actually work to make a healthy person even healthier.
21 November 2014, 05:15 PM ET
When the weather outside is frightful, people tend to move around less, according to new data from Jawbone, a technology and fitness-tracking company based in San Francisco.
21 November 2014, 05:00 PM ET
New evidence supports the theory that sexual activity lowers prostate cancer risk.
21 November 2014, 04:12 PM ET
A new wearable device that translates spoken words into vibrations could help deaf people perceive speech in a completely new way.
21 November 2014, 03:38 PM ET
The 1977 disco hit "Stayin' Alive" is officially the song to accompany CPR's chest compression. But Japanese scientists are now teaching the lifesaving maneuver using other songs that have the right beat for CPR and are more popular in their country.
21 November 2014, 03:25 PM ET
A new app, called EASE (Electronic Access to Surgical Events), gives families and friends a 'Snapchat' type feed from a nurse, sending images, videos and 2-way texting during long surgical procedures.
21 November 2014, 02:17 PM ET
New innovations, such as phone-based urine tests and apps that keep all medical records in one place, could change how people experience health care.
21 November 2014, 12:15 PM ET
21 November 2014, 11:57 AM ET
The 2014 Ebola epidemic in West Africa is the worst Ebola outbreak in history, and has implications for the world. Here is everything we know about the virus, and its spread, so far.
21 November 2014, 07:10 AM ET
The picosecond pulse duration laser is currently approved for tattoo removal, but researchers are testing it in people with acne scars.
21 November 2014, 07:08 AM ET
People who use marijuana daily for four years or longer may experience changes in the size of the brain's orbitofrontal cortex, and in the brain's connectivity, a new study suggests.
21 November 2014, 03:39 AM ET
Spirulina, a supplement made from blue-green algae, is touted as a "superfood." It is highly nutritious, but there is not enough evidence to determine if Spirulina is effective for treating any health conditions.
20 November 2014, 09:40 PM ET
The endocrine system is a collection of glands that secrete hormones.
20 November 2014, 09:12 PM ET
A urinary tract infection is an infection of any part of the urinary tract, which includes the bladder, kidneys, ureters and urethra.
20 November 2014, 05:23 PM ET
It might be difficult to carefully avoid all of the tasty foods that contain harmful trans fats, but now there's one more reason to try: A new study shows that this type of fat may damage memory in young people.
20 November 2014, 04:31 PM ET
A round of golf may put you at risk for tick exposure — golf courses are prime habitats for the blood-sucking creatures, experts say.
20 November 2014, 03:26 PM ET
The popularity of fitness trackers has exploded, yet few people keep using these devices after a few months. Now, researchers are looking at what key features would it would take to make trackers better.
20 November 2014, 01:04 PM ET
Stress in one generation can lead to problems in that generation's offspring, but it may also pass certain benefits on to future generations, new research in mice suggests.
20 November 2014, 12:57 PM ET
About a third of U.S. adults drink excessively, but most of these people are not alcoholics, according to a new report from the Centers for Disease Control and Prevention.
20 November 2014, 12:01 PM ET
The advent of 'smart' tech has led to new baby monitors meant to give parents peace of mind about their babies' sleep safety. But these devices are untested and offer only false reassurance, one researcher says.
19 November 2014, 07:24 PM ET
New stretchable ink and embedded sensors could make smart shirts, sports bras and vests that can log miles, monitor heart rate and even predict people's long-term health.
19 November 2014, 06:35 PM ET
Most of the top results from Internet searches on weight loss guidelines link to unreliable sources, a new study found.
19 November 2014, 04:22 PM ET
A new website ranks popular restaurant chains in the United States based on the healthiness of their food.