You can eat 大蕉, it should be no problems. Other banana cannot eat ga. You can also eat 5 different type of fruit for each day, it can also solve toliet problems as well.
I just know only 大蕉 do not have those material cause the problems. Other type of banana cannot eat ga la. But of course, if you do not feel comfortable, it is better not to eat la.
I have eat 大蕉, around 1-2 per week with different kind of fruit.