General Health Articles

General health articles: clear explanations of how the body works, prevention, well-being, and everyday factors that affect health.

Why You Cough After Laughing: Causes and When to See a Doctor

A short coughing fit after loud laughter can also occur in a person without a lung disease.

Lutein and Zeaxanthin: Do Your Eyes Really Need Them?

Lutein and zeaxanthin are indeed related to eye health: they accumulate in the macula—the central area of the retina that provides the sharpest vision—and form a significant portion of macular pigment. But this doesn't mean everyone needs to take them in capsule form.

Collagen for joints: does it help and what does the research say?

Yes, there is evidence of collagen's benefits for joints, but it's important to understand it correctly. Modern meta-analyses of randomized trials show that in people with osteoarthritis, primarily of the knee, collagen supplements can, on average, slightly reduce pain and improve function.