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More Stable B12 Levels: For some, a consistent daily oral dose might help smooth out any peaks and troughs in B12 levels that could occur between injections, leading to more consistent energy and symptom control
World Health Organization (WHO)
The 28-day limit is therefore a safety margin that accounts for cumulative contamination risk across multiple punctures, not a reflection of preservative chemical degradation
Treating a deficiency can help remove these barriers
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