ScienceInsights

Some supplements may genuinely help with brain fog, but the right one depends on the cause. Here's what the evidence says about the most common options.

The submandibular gland quietly produces most of your saliva each day. Here's how it works and why it's so prone to painful salivary stones.

Yellow nails in older adults can stem from fungal infections, diabetes, psoriasis, or other causes. Learn how to tell them apart and what treatment options exist.

Cold sores are caused by herpes simplex virus, but the stigma often doesn't match the reality. Here's what you should know.

Nap length matters more than you think. Learn which durations leave you refreshed versus groggy, and how the ideal nap changes from infancy through adulthood.

Swollen legs from edema can be uncomfortable, but simple habits like leg elevation, compression socks, and movement can help bring real relief.

Adderall XR is a long-acting stimulant used to treat ADHD. Learn how it works, how it differs from regular Adderall, and what side effects to watch for.

BMI has real limitations, but cost, speed, and systemic inertia keep it in clinical use. Here's why doctors still rely on it and what they should do instead.

Whole wheat pasta may offer mild anti-inflammatory benefits through fiber, nutrients, and blood sugar control — here's what the research actually says.

Practical tips for getting through the flu, from managing fever and congestion to knowing when you're ready to return to normal life.