https://www.wellandgood.com/vitamin-a-foods/
We haven't talked about the fact that in the 3rd world, the WHO gives 300,000 to 500,000 iu vitamin A injections to save the lives of children, who would otherwise die from infection, after going blind.
I believe Linus Pauling's basic daily recommendation was 25,000, but anti-cancer doses can be as high as 100,000 iu orally daily iu