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Vitamin B12 can cause dermatitis, acne, and other skin-related conditions when taken in excess, according to a review in the American Journal of Clinical Dermatology
Hydroxocobalamin is safe to use during pregnancy and breastfeeding, with dosing generally following the standard schedule
Both sublingual vitamin B12 supplements and B12 injections can be appropriate depending on your specific circumstances
Strict vegetarians and vegans, or people with conditions that prevent them from absorbing nutrients from food, are the most likely people to be deficient
Whatever method you choose, you'll have to take B12 supplements for life
Here are expert-backed guidelines to help ensure every injection is both safe and effective
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