ScienceInsights

Salt water gargles can ease sore throat pain by reducing swelling and thinning mucus, but the evidence has some limits. Here's what it actually does.

Whether hair grows back depends on the cause. Learn which types of hair loss are reversible and which may be permanent.

Find out how many vegetables you actually need each day to support weight loss, including which types matter most and a realistic daily target.

Learn practical ways to increase your driver swing speed, from using ground force and overspeed training to gym work and equipment tweaks.

Insulin pen needles are designed for single use. Here's what happens when you reuse them and how it can affect your dose and skin health.

Eggs have little impact on blood sugar, but how many you eat and how you cook them matters for managing diabetes well.

Learn how the spinal cord's ascending tracts carry sensory information from your body to your brain, including touch, pain, and movement signals.

Decaf green tea keeps most of its antioxidants but loses some benefits tied to caffeine. Here's what changes and what stays the same.