The mesolimbic pathway, connecting the ventral tegmental area to the nucleus accumbens, plays the primary role in motivation and reward anticipation
Zonulin and its regulation of intestinal barrier function: the biological door to inflammation, autoimmunity, and cancer
The FDA still has to decide what happens next
Histology and Histopathology
In more serious cases, you might need an injection of B12
One would surely argue that some groups are more at risk for B12 deficiencies and could, therefore, benefit from injections: vegetarians and vegans have impaired B12 absorption due to changes from diet, while older adults have changes due to aging