b12 injection before a flight Seeing Red: Do Injections Work? B12 Injections - Maryland Plastic

While biotin deficiency is relatively uncommon, individuals with certain metabolic conditions, those taking long-term medications such as anticonvulsants, or patients with poor nutritional absorption may benefit from intramuscular administration

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[36] Vitamin B 12 deficiency is most commonly caused by malabsorption, but can also result from low intake, immune gastritis, low presence of binding proteins, or use of certain medications

However I came off Lymecycline in July & had my b12 shot and spots came back