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doi:10.1038/s41586-020-2025-2
Ferreira, S
Over the past five or 10 years, methylene blue has come to be touted online as a so-called nootropic agent a substance that enhances cognitive function
It can take many years (approx 20) to develop a deficiency disease in those altering their diet to one lacking in B12 due to reabsorbtion however, if failure to absorb leads to B12 deficiency disease occur within a few years (3-4)
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