ScienceInsights

Dry scalp can usually be relieved with the right shampoo, washing habits, and a few key ingredients. Here's what genuinely helps.

Adults typically have 12 molars, but many people end up with fewer. Learn how molars are arranged, when they come in, and why wisdom teeth are often missing.

Practical ways to reduce edema swelling at home, from leg elevation and compression to diet changes and gentle massage.

Sleep does a lot more than rest your body. Learn what your brain, heart, and hormones are actually doing while you sleep, and what happens when you don't get enough.

One cup of bone broth a day works for most people, but sodium and lead levels mean more isn't always better. Here's how to find your right amount.

IU stands for International Unit, a measure of biological activity. Learn what it means for vitamin D dosing and how it compares to micrograms and blood test results.

Fatty liver can often be reversed through weight loss, diet changes, and exercise. Here's what the evidence says about how to do it.

Sunburn blisters mean a second-degree burn. Learn how to care for them at home, what to avoid, and when it's time to see a doctor.

Narcissists often follow predictable patterns with partners, from idealization to control tactics. Here's what those relationships typically look like.

Learn what substance abuse counselors do, the skills and credentials they need, where they work, and what they typically earn in this growing field.