can b12 injections affect periods I got a injection and have not gotten my period after it. Is this normal? I didn't get the injection for low b12 Why is my period late?

Elevated levels of these markers are a much more sensitive sign of a true deficiency than the standard B12 test alone

Jan 17, 2026 The answer depends on three separate factors that most guides confuse or conflate

Under normal conditions, NNMT activity can consume substantial amounts of both nicotinamide and SAM, particularly in metabolically active tissues or during periods of metabolic stress

Vitamin B12 also helps make DNA, the genetic material in all your baby's cells

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