Sublingual B12, which bypasses the gastrointestinal tract, is the least invasive and potentially most cost-effective option, especially for individuals with impaired absorption, making it an attractive alternative for long-term and patient-friendly management (Vidal-Alaball et al., 2006)
Its important to switch injection sites to avoid problems
The mechanisms are complementary, making this combination theoretically rational
Monitor the sitesome redness, soreness, or slight swelling is normal
Treatment should start urgently and should not be delayed for laboratory confirmation if neurological features strongly suggest B12 deficiency
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