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B12 Injection Needle Size & Gauge Needle size refers to the length of the needle, which determines its penetration depth and is measured in millimeters (mm)
For example, concurrent use of chloramphenicol (an antibiotic) may attenuate the hematologic response to vitamin B therapy
Most people who have a vitamin B12 injection feel either nothing different or a gradual lift in energy over the following days
Journal of Blood Medicine
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