As I elaborate on in my video The Symptoms of Vitamin B12 Deficiency , these include: Abdominal distention Chronic diarrhea Shortness of breath Swollen, red, painful feet Skin darkening Bilateral useless hand syndrome Numbness and tingling in the hands and feet Muscle cramps Dizziness Cognitive disturbances Difficulty walking Erectile dysfunction Fatigue Depression Psychosis Coma Blindness Vitamin B12 Deficiency Treatment Is A Vitamin B12 Shot Better Than Taking B12 Orally
Side Effects & Mitigation Because there is no completed human safety trial, the honest statement is that the human side-effect profile is not well characterised
Consult published literature for dosing parameters
They are typically marketed as research compounds and sold under for research purposes only disclaimers
Prescribing decisions should involve a physician experienced in peptide therapy, baseline lab work (fasting glucose, insulin, IGF-1, CBC, CMP), and scheduled follow-up labs at 6 to 8 weeks