Black turtle bean (frijoles negros) and small red bean (frijoles rojos). 2 parts of the former and 1 part of the latter cooked together worked wonders for me.
The combination, or even both items separately, contains a ton of fiber. However, the result is contra to what's expected from eating such a food combination. Instead of making matters worse, like eating other beans (black-eyed beans, for example) would do, it completely stopped (cured) it.
I think it deserves further study by those in the area of research.
Black turtle bean (frijoles negros) and small red bean (frijoles rojos). 2 parts of the former and 1 part of the latter cooked together worked wonders for me.