Side effects are generally few
Illustratively, it is produced in the central nervous system (i.e., brainstems raphe nuclei) (12% of the serotonin in the human body), skin (i.e., Merkel cells), lung (pulmonary neuroendocrine cells), gastrointestinal tract (90% of the serotonin in the human body) (i.e., enterochromaffin cells), and rest of 8% is stored in platelets [166]
Research-grade BPC-157 is classified for laboratory use
Mix water with lemon slices, cucumber, or a small amount of mineral-rich salt to increase alkalinity naturally
Individuals most likely to need B12 vitamin shots include older adults, vegetarians, vegans, and those with digestive disorders
The injection versus oral supplement debate really comes down to your individual situation