1ml of b12 injection Cyanocobalamin (B12) 1000 mcg/mL, Multiple Dose Vial 1 mL, 25/Tray B12 Shot Homekit

Catastrophic, really

Yet B12 deficiency is surprisingly widespread

(2004) Obesity n=98 Extended 52-week RCT of AOD 9604 5mg versus placebo with assessment of sustained weight loss and tolerability

Persistent side effects are not typical and may indicate individual sensitivity, peptide quality issues , or unrelated causes

Overcoming Malabsorption: For conditions like pernicious anaemia, where the body cannot absorb B12 orally due to a lack of intrinsic factor, injections are the only effective treatment route

If you already have a diagnosed deficiency under NHS care and your symptoms return before your next scheduled dose, that is a conversation to have with your GP, who can review the schedule