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For any immediate trouble breathing or swelling of the lips/tongue, call 911 or go to the nearest ER right away
Calorie creep, where portions gradually increase, can offset the appetite suppression from GLP-1 agonists
Its one of the main reasons why B12 deficiency is more common in older adults and why many find that regular B12 shots help them feel more vibrant and sharp
Common adverse effects include: Injection site reactions pain, redness, swelling, or bruising at the intramuscular injection site Gastrointestinal disturbances nausea, diarrhoea, or abdominal discomfort Headache and dizziness particularly following initial doses Skin reactions including rash, pruritus, or acne-like eruptions Flushing temporary redness of the skin Chromaturia red-coloured urine (harmless but can cause concern if unexpected) Less common but more serious reactions include: Hypersensitivity reactions ranging from mild urticaria to anaphylaxis (rare but potentially life-threatening) Hypokalaemia particularly during initial treatment when rapid cell production occurs [5] [16] Temporary changes in blood counts during correction of deficiency Interference with laboratory tests primarily with high-dose IV hydroxocobalamin used for cyanide poisoning, not typically with standard 1mg IM replacement doses Cautions and contraindications: Hypersensitivity to cobalt or vitamin B12 Cyanocobalamin should be avoided in Leber's hereditary optic neuropathy [2] [17] Chloramphenicol may reduce the haematological response to B12 therapy Patients receiving B12 injections outside clinical necessity face unnecessary risks without proven benefit
Common Injection Sites Where to inject B12 depends on body type, injection size, and personal choice
Maximum benefits are usually achieved within 1-2 months with consistent injections
