Jason's intensely uncomfortable withdrawal symptoms following heroin use were probably due in part to a reduction in his body's normal production of endorphins.
Endorphins are a class of bodily hormones that are released predominantly in the hypothalamus as well as pituitary glands of the brain and have a variety of physiological activities. They are peptides that activate the opiate receptors in the body, resulting in analgesia.
Endorphins are substances that are naturally created in response to pain or stress because they may work as a pain reliever and happiness enhancer.
As a result, Jason's intensely uncomfortable withdrawal symptoms following heroin use were probably due in part to a reduction in his body's normal production of endorphins.
Learn more about endorphins here:
https://brainly.com/question/10102983