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can b12 injections affect kidneys Vitamin deficiency and cognitive impairment: A comprehensive review of neurological impact How Vitamin B12 Shots Improve
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PMC 6494183

R.PaigenB.NaggertJ

Nevertheless, observational studies such as these cannot determine whether low levels of vitamin B12 were the cause of the weight gain or whether higher levels of vitamin B12 protected against lower levels

It functions in cellular signaling and lipid metabolism and has a role in serotonin signaling, which is the basis for the frequent claim that it curbs appetite
