Female doctor standing with mother and daughter.


Nearly one in three children who are tested for peanut allergies using a well-established and widely used blood test may be allergic to peanuts, according to the latest Quest Diagnostics Health Trends study to examine diagnostic insights into allergy trends in America.

Happy couple

Cardiovascular Health

A new peer-reviewed Quest Diagnostics Health Trends™ study finds that decades of declines in LDL cholesterol blood levels, a key marker of death risk from heart disease, abruptly ended in 2008, and may have stalled since.

Scientists in laboratory performing hair testing and drug testing

Drug Testing Index™

Drug use among American workers declined dramatically over the past 25 years, although the rate of positive test results for certain drugs continues to climb according to a landmark analysis of more than 125 million workplace urine drug test results.


More Health Trends Quest Diagnostics Health Trends™ reports also include studies of gestational diabetes, diabetes, H1N1 Influenza, kidney disease, cardiovascular health and rotavirus infection.