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A b12 injection bypasses the digestive system entirely, ensuring 100% absorption

10.1002/jor.22831 12 FuX.XuM.JiaC.XieW.WangL.KongD.et al (2016)

Every vial from an FDA-registered manufacturer is traceable through the pharmaceutical distribution system

However, when I have them describe the pattern they received, or look at the procedure note, it is almost always a suboptimal pattern and/or dose
