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Microbial contamination is invisible to the naked eye at concentrations that still pose risk
Wipe the rubber stoppers with alcohol and let them dry before each pierce, use a fresh sterile needle and syringe every time, and work in a clean preparation area
The study found no significant differences in systemic side effects between routes, but noted that injection site reactions were the leading cause of treatment discontinuation (3% of injectable users versus 1% of oral users discontinuing due to GI upset)
B12 shots, the key difference lies in the ingredients
Some vitamins act as
Neither dosing pattern has been validated in controlled human trials
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