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But it requires methyl molecules, which are often in low supply (modern life is full of toxins), especially in folks suffering from B12 deficiency or pernicious anemia

A.et al (2020)

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It supports the production of myelin, which is central to the protection of nerve fibers

Colonization studies demonstrate that specific commensals, such as Bacteroides thetaiotaomicron , are required for normal enteric neural development and neurotransmitter biosynthetic capacity 70 , indicating that microbial signals shape ENS architecture and baseline excitability