A new study examining the placebo effect shows that patients will feel better if they believe they are taking painkillers, even if their doses contain no medication.

The University of Michigan study shows that the brain releases chemicals that relieve pain in patients who believe they're being treated

A new study shows that aspirin helps colorectal cancer but only after a decade of use, weakening hopes that low doses of the drug prevents the disease.

A 20-year study of almost 83,000 nurses shows that low doses of aspirin did not lower cancer risk significantly. High doses of aspirin - such as two or more aspirin per day - reduced colon cancer risk by a third but also were linked to dangerous bleeding, according to the study published in Wednesday's Journal of the American Medical Association

A new study, published in The Lancet, says that giving young children in developing countries a weekly dose of the mineral, zinc, can substantially reduce their risk of illness and death.

In a study, conducted from 2000 to 2003, pneumonia caused almost 20 percent, or 2 million of 10.6 million, deaths, among children younger than 5 years worldwide. Diarrhea causes a further 1.9 million deaths annually to those at-risk children

Doctors discover a new test that detects iron deficiency in infants earlier and more accurately than the commonly used hemoglobin screening test

Third Wave Technologies Inc. wins U.S. approval Monday to market a genetic blood test that could help make certain medicines more personalized, allowing doctors to adjust drug dosages accordingly, and minimizes side effects.

The Food and Drug Administration says the Invader UGT1A1 Molecular Assay has so far only been shown to work with Pfizer Inc's colon cancer drug Camptosar, but future data could link it to other drugs