b12 injection pen Needle less injections for pernicious anaemia Safe B12 Injection Guide at

Mark the vial and discard after two days regardless of appearance

3 Extended Administration Pharmacokinetics in DIO Mice Neelakantan et al., Biochemical Pharmacology (2024) This study reported a 28-day once-daily administration protocol of 5-Amino-1MQ in diet-induced obese mice, characterizing plasma pharmacokinetics, tissue distribution, and effects on body composition, fatty liver pathology, and circulating biomarkers

A deficiency can also result from not getting enough B12 in what you eat due to various food restrictions

95% CI, 1.02-2.04), but this study did not find an association between plasma concentrations of vitamin B 12 and breast cancer (55)