Science limited on the drinking age
 On July 17, 1984, President Ronald Reagan signed into law the National Minimum Drinking Age Act, which withheld a percentage of highway funds from any state that didn't raise the minimum drinking age to 21.

5 things to know about Alzheimer's
 Approximately 44 million people live with dementia worldwide, according to the Alzheimer's Association. By 2050, that number is expected to more than triple to 115 million.

Spanking's effect on kids' brains
 Researchers say physical punishment actually alters the brain -- not only in an "I'm traumatized!" kind of way, but also in an "I literally have less gray matter in my brain!" kind of way.

Can meditation slow aging?
 Researchers are trying to show that meditation could help counter the aging process.

Cancer overtreatment must stop
 Studies found that a large number of American men with prostate cancer get unnecessary and aggressive treatment, Dr. Otis Brawley says.

5 myths about the urge to 'go'
 Even though urinary incontinence affects about 25 million Americans and there are many treatment options to improve symptoms, talking about the often unexpected and always urgent need "to go" is still taboo, even with your doctor.

More stores affected by fruit recall
 Bought fruit at Costco, Trader Joe's, Kroger or Walmart recently? Contamination concerns at a packing plant have stores clearing their shelves.

What Obamacare court decisions mean for you
 Two U.S. appeals courts have issued conflicting rulings on Obamacare subsidies. Check out this FAQ.

Training for your first triathlon? 4 common Qs
 Tackling your first triathlon? Even the best triathletes in the world started somewhere -- and made their share of rookie mistakes.

This won't be the AIDS-free generation
 In the United States, 26% of all new HIV infections are among young people ages 13 to 24. Yet only 1 in 5 high school students is tested for HIV.

How to avoid being hit by lightning
 CNN's Holly Firfer tells us the best ways to avoid being hit by lightning.

100 pounds down with plant-based diet
 For years Benji Kurtz was severely obese. He tried diet after diet. Then the solution to his weight loss problem found him.

Federal marijuana bill would legalize some strains
 The bill would amend the Controlled Substances Act to exempt marijuana plants with an extremely low percentage of THC, the chemical that makes users high.

First impressions made in 100 milliseconds
 Making a good first impression might have more to do with your facial features than choosing the right outfit, a new study reveals.

You don't want this surgeon
 You might be impressed that your doctor can perform a wide variety of procedures, but sometimes having an expert in just one or two is best, Dr. Anthony Youn says.

Heavy drinker? You'd be surprised
 One in 10 deaths among working-age adults are due to excessive alcohol consumption. But what really constitutes "heavy drinking"?

Vaccines are safe. Seriously.
 Children should get vaccinated against preventable and potentially deadly diseases. Period.

One drink. 8 cookies. Same sugar.
 

Fear among Ebola aid workers
 Dr. Sanjay Gupta looks at fear spreading amongst locals that aid workers helping those with Ebola are spreading the disease.

He lost 100 pounds with this diet
 For years Benji Kurtz was severely obese. He tried diet after diet. Then the solution to his weight loss problem found him.

First impressions made in 100 ms
 Making a good first impression might have more to do with your facial features than choosing the right outfit, a new study reveals.

Train like a lady lumberjack
 Shana Verstegen started logrolling when she was 7. The sport has made her a six-time world champion and given her six-pack abs.

10 yoga poses to beat stress
 Don't let stress get the best of you! Start your day off right with this yoga sequence for beginners. These 10 yoga poses will have you feeling refreshed in no time.

Liberia closes its borders to stop Ebola
 The deadliest Ebola outbreak in history continues to plague West Africa as two American health care workers fight off infections.

Brain dead: What it is, what it isn't
 CNN's Dr. Sanjay Gupta explains how doctors determine if a patient is brain dead.

Hear Mrs. O rap for healthy foods
 First lady Michelle Obama raps about food at an event to propose limits on the types of foods advertised in schools.

World's most dangerous workout?
 Is the "sport of fitness" the world's most dangerous workout? CNN's Jarrett Bellini asks CrossFitters and gives it a go.

Selfies leading to head lice
 Nurses report "selfie" posts are causing an increase in teenagers spreading lice.

Teacher eats only McDonald's
 A teacher only eats McDonald's for 90 days, and LOSES 37 pounds. KCCI reports.

See man after 700-lb. loss
 Robert Walls tipped the scales at 950 lbs. before he made a big decision that helped him shed hundreds of pounds.

This is your body on weed
 Dr. Sanjay Gupta explains how marijuana affects the brain and how pot can be used to treat certain conditions.

Is red meat really bad for you?
 CNN's Dr. Sanjay Gupta talks with Nina Teicholz, author of "The Big Fat Surprise."

Twin boys born 24 days apart
 Due to a delayed delivery, a set of twins in Massachusetts were born 24 days apart. WCVB's Mary Saladna reports.

String may help you live to 100
 Dr. Sanjay Gupta tells us how flossing regularly not only helps prevent heart disease but can also help you live to 100.

Men take their health to heart
 A father who lost his dad and brother to heart disease intends to avoid the same fate. CNN's Holly Firfer reports.

Say 'Hello.' You'll live longer
 Dr. Sanjay Gupta tells us how something as simple, and as nice, as saying "hello" can help you live to 100.

Pregnant and she didn't know it
 A Seymour, Connecticut, woman gave birth after being pregnant for 9 months with no idea she was carrying a baby.

Sleep more, lose weight
 Dr. Sanjay Gupta tells us how sleeping more can actually help you feel less hungry.

Ha! Laughter is the best medicine
 Scott Weems, author of "Ha! The Science of When we Laugh and Why," speaks with CNN's Dr. Sanjay Gupta.

Plastic surgery gone wrong
 Dr. Terry Dubrow and Dr. Paul Nassif from E!'s new show "Botched" discuss the risks and complications of plastic surgery.