Ever felt like you're just waiting for the other shoe to drop, especially regarding medical test results? Francis Collins, the former NIH director, found himself in that situation, dancing the ...

Your body typically uses glucose, or sugar, as its main source of energy. When cells don’t get the glucose they need, the body begins to use fat instead. Burning fat produces ketones, a type of acid ...

Urine tests can detect alcohol metabolites in your system long after you’ve had your last drink. When your body processes alcohol, it produces alcohol metabolites. These metabolites stick around in ...