I read this article from Examine website,it says green tea blocks almost all digestion enzymes,fat absorption is affected only weakly but carbs are absorbed 25% less!
I think this is rat study with purified catechins,cant estimate how does this translate to human having cup od tea.
On one hand,it sounds bad,blocking so many enzymes must hurt digestion,some people need to take enzymes supplements.
On other hand,fat is almost unaffected while carbs are heavily blocked,this sounds great for keto,I just hope it wont cause shartmaggedon and gasocalypse,neither the fermentation by bacteria,or intestine tsunami caused by osmotic reaction is pleasant,what you think?
https://examine.com/nutrition/does-green-tea-inhibit-nutrient-uptake/