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One study found that high doses of oral B12 (1,000 mcg daily) could provide adequate absorption even in the presence of intrinsic factor deficiency
Consider complementary NAD+ precursors (NMN/NR) per emerging stack protocols [8]
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Key takeaways Vitamin B12 shots are injections that a doctor may prescribe to treat a vitamin B12 deficiency
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The compound's influence on NAD+ pathways also positions it within broader longevity research, a field that has seen explosive growth by 2026
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