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How long results hold depends on factors like condition severity, lifestyle habits, dosage, and whether the full protocol was completed
But critics fear the FDAs stamp of approval will simply legitimize the use of unproven substances whose dangers may only become apparent in coming years
Intrinsic factor, produced by parietal cells in the stomach lining, binds to free b12 and enables absorption in the terminal ileum
The main difference is concentration
Applications encompass investigating cognitive aging, neurodegenerative disease prevention, and brain performance optimization through metabolic enhancement
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