Water keeps your body functioning, but electrolytes control how that hydration actually works inside you. Understanding when you need just water and when you need both can help prevent fatigue, cramps ...

That deep ache you feel a day or two after training isn’t random—it’s a powerful biological signal that your body is rebuilding stronger than before.

Microplastics and nanoplastics are now found everywhere on Earth, from ocean depths to agricultural soils and even inside the human body. Yet scientists still struggle to understand what these ...

Interoception is how your brain senses and responds to what’s going on inside your body. “It’s how we know when we’re hungry, thirsty, anxious, or even need to take a deep breath,” says Wen G. Chen, ...

If you notice light spotting in early pregnancy, it’s natural to wonder if it’s implantation bleeding or something else.

When it comes to health and fitness, it's easy to get caught up in numbers, but physical well-being isn't always reflected in the outward metrics of scales. Your body may be performing at a much ...