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Nevertheless, certain conditions can impact the absorption or intake, hence often leading to deficiency, for example, pernicious anemia or if the individual follows a vegan diet

2022 Feb;40(1):1-16

Evaluating sources of B12, confirming the test result, and monitoring trends over time can provide clarity

But, injections and infusions are the most effective

Signs You May Have a Vitamin B12 Deficiency Even a slight Vitamin B12 deficiency can manifest symptoms substantial enough to compromise your everyday quality of life

During pregnancy and breastfeeding, B vitamins are vital, but therapeutic doses should still be clinician-guided to avoid unnecessary excess