pink urine after b12 injection Vitamin B12: All You Need to Know Why does B12 injection cause

Localized scalp injection theoretically increases dermal concentration at the follicle site, but it also limits systemic distribution that might benefit follicles across the entire scalp

If the cause of your lack of vitamin B12 is diet related rather than due to pernicious anaemia then treatment may be different

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2 The British Society for Haematology recommends intramuscular vitamin B 12 for severe deficiency and malabsorption syndromes, whereas oral replacement may be considered for patients with asymptomatic, mild disease with no absorption or compliance concerns