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These studies provide insight into cancer risk, as they lasted only days to weeks, involved tiny samples, and measured only acute tolerability without assessing carcinogenic potential or effects on pre-existing malignancies
The relative lack of side effects is particularly important for those with recurring or chronic pain, as it lowers the risks associated with multiple injections
The Hospira label lists the preservative at either 0.9% (9 mg/mL) or 1.1% (11 mg/mL) depending on the presentation, with a pH of 5.7 in a range of 4.5 to 7.0
As of March 2026, availability may still vary by state
Extra strength B-12 supplements offer this amount3,000 mcgin one serving
