Met-enkephalin, also known as metenkefalin (INN), sometimes referred to as opioid growth factor (OGF), is a naturally occurring, endogenous opioid peptide that has opioid effects of a relatively short duration.
Met-enkephalin, also referred to as metenkefalin (INN) or opioid growth factor (OGF), is a naturally occurring peptide that functions similarly to other opioids, albeit with a shorter duration of action.