Cortisol is a hormone produced by the adrenal glands, which sit on top of your kidneys. It plays a crucial role in helping your body respond to stress. When you're faced with a stressful situation, cortisol levels increase, providing you with the energy needed to handle challenges. This is often referred to as the "stress hormone." In addition to its role in stress response, cortisol helps regulate various functions in the body, including metabolism, immune response, and blood sugar levels. While it's essential for health, too much cortisol over time can lead to problems like weight gain and anxiety, highlighting the importance of balance.