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[NCBI Bookshelf] ncbi.nlm.nih.gov OKane M, Parretti HM, Pinkney J, et al

Vitamin D injections are used to support bone health, immune function and mood, particularly during the winter months when deficiency is common in the UK

This study showed an 8 times increase in the mean cobalamin concentration sustained 1 week following the final dose (Slot et al., 1997)
