In severe cases, B12 deficiency can lead to neurological symptoms, these can include: tremors, seizures, or ataxia (a loss of coordination)
Therefore, it is not appropriate most -- especially those who are pregnant, breastfeeding, have active cancer, or certain metabolic conditions
Journal of Endocrinology and Metabolism, 3(1-2), 10-15
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One of the most well-known benefits of B12 is its ability to increase energy levels
Sometimes, this tingling is mostly on one side of the body