too much vitamin b12 injections How Are Shots? Vitamin B12 Shots Guide: Benefits
Description
There are natural and synthetic peptides that perform body functions

Avoid using the intravenous route
The 5mg format provides researchers with a practical quantity of material suitable for multiple laboratory applications while supporting accurate measurement, handling, and experimental consistency

SLU-PP-332 SLU-PP-332 is a synthetic small-molecule ERR (estrogen-related receptor) pan-agonist under investigation for its role in mitochondrial biogenesis, skeletal muscle fiber-type switching, and metabolic regulation

These can lead to side effects or reactions that you may then associate with the B12 itself, even though B12 has nothing to do with them
