Researchers have proposed several non-exclusive frameworks, including blood-brain-barrier transport of an endogenous peptide, interaction with the stress axis, circadian and pineal signalling via the alpha-1-adrenergic receptor (PMID 3029331), and neuroprotective activity
But believing it works is not good enough
After positively identifying my patient (my lab supervisor), and double checking that the insulin type (rapid acting Humalog) was accurate and not expired, I proceeded to uncap the needle, picked up the vial of insulin and then promptly botched the draw by ramming the tiny needle tip into the metal seal of the insulin vial, rendering the needle dirty, dull and useless
Allergy control, through avoidance, medication, or immunotherapy, can prevent recurrent symptoms