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An overdose of vitamin B12 through diet is hardly possible and also not known, since the required transport protein IF (intrinsic factor) and absorption via the intestinal mucosa are two major barriers
pinch the skin and deliver slowly into subcutaneous tissue not intramuscular or intravenous
In this setting, oral replacement will be of interest for clinicians to avoid painful and administration difficulties, and cost of monthly injections
2 International Journal of Molecular Sciences (2018) Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene DataPickart & Margolina (PMID 29986520)
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