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Ligation of CD38 to the BCR complex in lipid rafts provokes tyrosine phosphorylation of several intracellular proteins, including spleen tyrosine kinase (SYK)

But unless you have a vitamin B12 deficiency, vitamin B12 injections aren't likely to give you an energy boost." Ironically, the National Institutes of Health says that symptoms of B12 deficiency include loss of appetite and weight loss

And while multivitamins and B-complex vitamin supplements can help supplement your folate intake, they are not a complete replacement for a healthy diet

From improving skin, hair, and nails to boosting energy and mood, B12 could be a valuable addition to beauty regimens