Does Caffeine Increase Intestinal Permeability?

Can someone point me to some studies that show caffeine (esp from teas)
increase intestinal premeability? I couldn't draw a conclusion based on
articles at pubmed using "caffeine" and "intestinal permeability" or
"muscosal permeability" or "ulcer" as search terms? Would a cup of
black or green tea per day be beneficial or detrimental for a person
with "Leak Gut Syndrome"?

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