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Precision becomes nearly impossible
Remember, B12 helps build and maintain the myelin sheath around your nerves, and without enough B12, it begins to recede
2002;957:2308 Bird ST, Etminan M, Brophy JM, Hartzema AG, Delaney JA
In some cases, you may be asked to take injections twice a year
Many of these products are manufactured without strict quality controls, leading to issues with purity issues, heavy metal contamination, or the presence of residual TFA (trifluoroacetic acid) from the synthesis process
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