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Surprising study shows high rates of anxiety, insomnia, depression, substance abuse, dementia, and other mental and neurological disorders

Not everyone who is obese needs to lose weight — it's possible to carry extra pounds and still be healthy, a new study says.

A study shows the popular anti-smoking drug Chantix, taken by 7 million Americans, is linked with a 72 percent increase in the risk of heart problems. Dr. Jon LaPook reports

A new government study shows that lung cancer screening with CAT scans can dramatically reduce the death toll. Betty Nguyen reports on the promising new study.

Mouse study shows controversial chemical "demasculinzes" males, making them less attractive to opposite sex

New study shows that women's ability to guess male sexual orientation improves at times of peak ovulation

New study shows smokers diagnosed with prostate cancer face heightened risk for cancer recurrence, death

Australian study shows 28-percent increase in libido among men taking extract of Asian spice

A recent medical study shows that teenagers who receive the HPV vaccine significantly reduce their chances of getting pre-cancerous cervical abnormalities despite previous concerns. Jeff Glor reports.

Vomiting for weight loss more common among boys than among girls, Chinese study shows

People given hallucinogenic 'shrooms experience greater well-being, study shows

New study shows hypertension, or high blood pressure, affects 19 percent of people 24 to 32 years of age

Women more attracted to dark, brooding "bad boys," surprising new study shows

Gastric bypass patients more likely to become alcoholics, study shows

Electronic health records are often touted as way to cut medical costs, new Kaiser Permanente study shows they have big environmental payoff