Retinol, aka Vitamin A1, is found in high concentrations in such foods as cow and chicken livers, butter, cheese and eggs, and cod liver oil. You can get enough

Retinol, aka Vitamin A1, is found in high concentrations in such foods as cow and chicken livers, butter, cheese and eggs, and cod liver oil. You can get enough by eating certain cooked vegetables, like carrots and spinach (it's hard to digest the Vitamin A found in most raw vegetables, and many vegetables are poor sources of retinol), but you can only really overdose by taking supplements or eating organ meat. All that has very little to do with autoimmune conditions, and I'm not aware of any effect on intestinal permeability. What are you on about?