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Direction of Future Research A multicenter randomized clinical trial is current in progress in Spain primary health-care setting called Project OB12 ( Conclusion Oral vitamin B12 replacement at 1000 g daily is an adequate alternative to IM B12 injections
Some peptide-related products such as oral collagen peptides are sold as supplements
Presented for research literature review only Ishidoh K et al
Nasal sprays may need to be used daily or as recommended by your healthcare provider
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