there is a list here of things that increase and decrease permeability https://www.researchgate.net/publication/286402822_Nutritional_Keys_for_Intestinal_Barrier_Modulation?enrichId=rgreq-01b4ccf7875f571bd7d80ccf123380ac-XXX&enrichSource=Y292ZXJQYWdlOzI4NjQwMjgyMjtBUzozNzU2NDc3MTAwMDcyOTZAMTQ2NjU3MjgwMTA1NQ==&el=1_x_2
interesting.... I noticed that EPA/DHA both increase leaky gut.... surprisingly, casein decreased