If you’ve ever wondered why your doctor asks you to do a blood test or provide a urine sample at your annual checkup even if ...

A customer enters the front door of a cannabis retailer in New York. Cannabis retailers say it's hard to sell flower with less than 20% THCa, the form of tetrahydrocannabinol that becomes psychoactive ...

Arizona's marijuana-testing labs have decreased from 18 in early 2024 to 11 by mid-2025. Dispensary pressure to manipulate test results, financial difficulties and business disputes contributed to ...

Hoping to catch serious illnesses early, more Americans are ordering lab tests online, but their doctors don't know what to ...

If a medical test result is inconclusive, the sample did not provide enough information to confirm a positive or negative result. A person may need another test. People can have various medical tests ...