ScienceInsights

Black semen is usually caused by blood mixing with semen. Learn what causes it, when it needs medical attention, and what to expect from an evaluation.

Coughing up phlegm is usually your lungs doing their job, but color, texture, and duration can signal when it's time to see a doctor.

Protein has 4 calories per gram, carbs have 4, and fat has 9 — but there's more to know when reading labels or tracking your intake.

Severe diverticulosis means more pouches, higher complication risk, and real symptoms. Learn what drives it and how diet and treatment can help.

Learn how to tell a maturing hairline from real hair loss, what's causing it, and which treatments actually work.

Some herbal teas can soothe heartburn, while others like peppermint may actually make it worse. Here's what to sip and what to skip.

From missed medication to hormonal shifts, learn what commonly triggers epileptic seizures in adults and how multiple factors can combine to raise your risk.

Learn how to insert a Dexcom sensor, pair it with your phone, and make sense of your glucose readings from day one.

Learn how your body actually burns calories, where fat goes when you lose it, and why everyday movement plays a bigger role than most people realize.