b12 supplement vs injection Vitamin Oral Injection​ Vitamin B12 Injections: Good or

B12 deficiency can lead to a range of dermatological issues, including dry, brittle hair, hyperpigmentation, and skin conditions like eczema

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Because injections do not rely on stomach acid or intrinsic factor, a much larger and more reliable share of the dose reaches your bloodstream, even when gut absorption is poor

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Colonetti, et al