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Potential drug interactions have not been systematically studied
Chemically, vitamin B12 can exist in various forms
Safety and Tolerability: What Is and Isnt Known Safety is often where the two compounds are oversold as side-effect-free. The accurate picture is narrower: both look well tolerated in the limited settings that have been studied, and both lack long-term human safety data
Abdominal subcutaneous injection is commonly used for convenience
Verify with the dosage calculator if unsure
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