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Description
For naturally occurring B12 in food, the presence of gastric acid, pepsin, and intrinsic factor is essential for liberation and absorption

The simultaneous presence of both these cytokines has a detrimental effect on intestinal integrity through the disassociation of tight junction proteins 63,64

10.1016/j.yexcr.2009.12.015 136

Prevalence of interstitial cystitis symptoms in a managed care population
