For instance, rotating injection sites can minimize local reactions, while staying well-hydrated can reduce headaches and dizziness
B12 is essential in the health of our blood cells, nerves and brain, DNA/RNA repair, and liver metabolism
High stress increases physical symptoms of all kinds
While this explanation touches on some interesting concepts, there are several points that need clarification and might be oversimplified or speculative: Lets start with neuronal compensation
Lincoff AM, Brown-Frandsen K, Colhoun HM, Deanfield J, Emerson SS, Esbjerg S, Hardt-Lindberg S, Hovingh GK, Kahn SE, Kushner RF, Lingvay I, Oral TK, Michelsen MM, Plutzky J, Torne CW, Ryan DH