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Adrenaline, also known as epinephrine, is a hormone crucial for the body’s fight-or-flight response. It is mainly produced in the adrenal glands as well as in some neurons within the central nervous system. When there is a stressful situation, adrenaline is released into the bloodstream. It signals organs to generate a response essential for survival.

Facts: Stressful situations occur for countless reasons and take different forms for everyone. An adrenaline rush may be triggered by public speaking, an interview, interacting with a potential romantic partner, spotting a twig that looks like a snake, skydiving or a roller-coaster ride. Adrenaline has played a vital role in human evolution. In prehistoric times reacting to bear attacks, warring clans and other physical threats meant the difference between life and death. Those who best responded by fleeing or fighting were more likely to survive and pass on their DNA. This hormone has enabled the human species to confront threats and survive for hundreds of thousands of years.

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