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If pain or redness persists or you notice swelling, contact your healthcare provider to determine whether you might be experiencing a local reaction to the injection or have an infection

Photo credit: Luclia Ribeiro

If the injection is needed (e.g., to replete B or B in a deficient mother), it can be used, but the infant should be observed for any unusual symptoms (though none would be expected from B vitamins, apart from perhaps looser stools if anything)

Safety depends on the ingredients, your health conditions, and whos administering them

This matters most for people who have trouble absorbing nutrients in the first place

Healthcare providers need to know how much B12 each patient needs