endorphins

1. Substances produced by the brain that have painkilling and tranquillizing effects on the body. Endorphins are thought to be similar to morphine and are usually released by the brain during times of extreme body stress. The release of endorphins may explain why trauma victims sometimes cannot feel the pain associated with their injuries.

Example Sentences

Studies show that donating to religious or charitable causes literally feels good, because such actions trigger the release of dopamine, endorphins and other “happiness chemicals” in the brain.

From Salon

“The adrenaline and the endorphins that I get off of working out and making my body feel good is what I like.”

From Los Angeles Times

“Techno can promote oxytocin and boost endorphins. It can encourage joy and play and really support brain development, emotional regulation and really enhance the parent-child bond as well.”

From Los Angeles Times

"It releases endorphins and has helped me to recover," he added.

From BBC

The runner’s high — which can occur with any form of exercise — was originally thought to be caused by the release of feel-good hormones called endorphins after a high intensity workout.

From Salon