does b12 injection have side effects Vitamin and Safety b12 injection side effects how
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[DOI] [PMC free article] [PubMed] [Google Scholar] 83.Fletcher, R

Suppose you are over the age of 75

Research shows 30% reduction in fat mass, decreased adipocyte size, and normalized plasma cholesterol levels equal to non-obese animals

To be clear: these were not individuals with a known Vitamin B deficiency