Use gentle cleansers and pat dry skin instead of rubbing
doi: 10.1016/j.jdiacomp.2013.03.002 134 ChoiYKKimMKBaeKHSeoHAJeongJYLeeWKet al
However, these do have to be prescribed and administered by a healthcare professional, and are more likely to be given to people who have lifelong conditions affecting their ability to absorb B12 or who are at higher risk of consistent deficiency
PubMed , Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline , National Academies Press (US), 1998
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For in vivo animal models, dosage is adjusted based on species and study specifics