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Elevated B12 levels likely enhanced oocyte maturation and embryo viability through improved methylation capacity [7], as evidenced by the positive correlation between B12 levels and embryo morphology in our cohort (Table 2)
Kannt A, Rajagopal S, Kadnur SV, Suresh J, Bhamidipati RK, Swaminathan S, Hallur MS, Kristam R, Pieper MP
For individuals without absorption issues, Lifeline Primary Care usually suggests oral B12 supplements or sublingual preparations
Hepatic or renal impairment these are compounds handled by the liver and kidneys
For a person with a confirmed deficiency, the documented dangers of leaving it untreated generally outweigh the rare, minor risks of the injections themselves