While true deficiency can cause serious problems, many people end up taking doses far higher than they need
Pharmaceuticals (Basel)
Long-Term Nutritional Follow-Up After Gastric Banding BOMSS recommends specialist MDT follow-up for at least two years post-surgery with lifelong primary care monitoring thereafter, including annual blood tests covering B12, full blood count, ferritin, vitamin D, and folate
ensure aseptic technique by using a sterile needle and syringe for each withdrawal
Common side effects include: Injection site reactions mild pain, redness, swelling, or bruising at the injection site, typically resolving within a few days Headache usually transient and manageable with standard analgesia Nausea or dizziness particularly in the initial treatment phase Skin reactions including itching, mild rash, or acneiform eruptions Temporary urine discolouration red or orange urine is harmless and expected Diarrhoea or flushing usually mild and self-limiting In patients with severe megaloblastic anaemia, low potassium levels (hypokalaemia) may occur during initial intensive treatment, but this is uncommon in routine maintenance therapy
