The immune system is a complex network that finds pathogens, removes damaged cells, and launches immune responses to protect the body from infection. White blood cells drive this defense: phagocytes ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Erika Rasure is globally-recognized as a ...

You’ve probably heard of potassium. The well-known nutrient may even conjure up vague images of bananas, electrolyte balance, and muscle cramping. But what exactly is this important nutrient, and ...