The use of fermented apple juice, a common household item, has been proposed as a remedy for intestinal permeability, a condition where the lining of the small intestine becomes damaged, allowing undigested food particles, bacteria, and toxins to leak into the bloodstream. This condition is medically termed increased intestinal permeability.
Advocates suggest the acetic acid and probiotics found within the liquid may promote a healthier gut microbiome, potentially reducing inflammation and strengthening the intestinal barrier. Historically, the substance has been used for its purported antibacterial and digestive properties, leading some to believe it can mitigate the effects of compromised intestinal integrity.