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Vitamin B12 plays a role in producing brain chemicals, such as serotonin, that help control mood and other brain functions
Without adequate intrinsic factor, only approximately 1% of dietary B12 can be absorbed through passive diffusion , compared to the normal active transport mechanism which is far more efficient
doi:10.1038/sj.ejcn.1602212
doi: 10.3389/fphys.2020.00270 381
Test delivery formats , where the included spray kit allows scientists to compare peptide dispersion, stability, and solution performance across administration methods
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