is b12 injection subcutaneous

One unsterilized injection introduces skin bacteria through the puncture https://m.media-amazon.com/images/I/81AN6AgwvFL._AC_UL450_SY450_QL70_.jpg Volume:10ml imported vitamin b12 for livestock animals Melts Pro™ Tesofensine + 5-Amino-1MQ Dissolving Strips | Alpha Omega Peptide

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