Pectus excavatum causes a sunken chest and can affect breathing and heart function. Learn what drives it, how it's diagnosed, and the treatment options available.
Chocolate can contain cadmium, a metal that builds up in the body over time. Here's what the research shows and how to enjoy chocolate with less exposure.
Fentanyl acts fast but fades quickly — yet that doesn't mean it's simple or safe. Learn how potency, delivery method, and onset speed all affect its duration.