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In this situation, it can be challenging to demonstrate B12 deficiency even when there are typical symptoms (including neuropathy-like paraesthesia and numbness), as serum B12 concentrations may be just within, or sometimes above, the normal range due to the oral supplementation
skin regeneration Stimulates skin cells (fibroblasts) to multiply and produce more collagen, improving skin structure and helping wounds heal
2025 Jul National Institutes of Health
What does vitamin B12 do exactly
Why Frequency Matters: The Science of B12 To understand why a provider might recommend weekly injections for a while, it helps to understand Vitamin B12 itself