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Each of these options has its own mechanism, evidence base, and risk profile
Sterile water contains no preservative, making it suitable only for single-use vials where the entire contents are used immediately
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This creates a 5mg/mL concentration with excellent readability at the lower dose levels
The recommended daily intake of vitamin B12 is 2.4 micrograms per day, but not many of us manage to rise to the challenge
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