Sore throat (pharyngitis) and bad breath (halitosis) are two symptoms that can co-occur in many health conditions. Certain infections, such as tonsilitis, as well as sinusitis and acid reflux, can ...

If a person’s breath smells like acetone — or nail polish remover — it may indicate that there are high levels of ketones in their blood. This may stem from diabetes, alcohol use, or dietary habits.

Metabolism is the essential bodily process of creating energy from food. Food consists of nutrients that the chemicals of the digestive system break down into sugars and acids for fuel. Metabolic ...

Think you can beat the current world record? Before you try, here's what happens when you hold your breath.