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Frequency of Injections How often you should get a B12 injection depends on whether youre correcting a deficiency or maintaining optimal levels
Transforming growth factor-beta 1 (TGF-beta1) induces angiogenesis through vascular endothelial growth factor (VEGF)-mediated apoptosis
Switching to preservative-free formulations typically resolves the issue for people who need b12 but react to standard preparations
Individuals with B12 deficiency, which can occur due to dietary restrictions (e.g., vegan or vegetarian diets), gastrointestinal disorders affecting absorption, older age, or certain medical conditions that interfere with B12 absorption
PMC 2809139
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