The adrenal glands are two small, triangular-shaped endocrine glands that sit atop the kidneys. These glands produce a variety of hormones that are essential to life, including adrenaline and cortisol.
The adrenal glands are responsible for the "fight or flight" response, which is the body's natural reaction to stress. When the body is under stress, the adrenal glands release hormones that increase heart rate, blood pressure, and energy levels.
Cortisol is another hormone produced by the adrenal glands. This hormone helps to regulate metabolism and helps the body respond to stress.
Cortisol levels can become elevated during times of stress, which can lead to a condition known as "adrenal fatigue."