(1) The "strings" don't break easily when pulled considering how thin they are. I thought a banana would not have that strength after having had the gastric juices acting on it.
(2) I haven't noticed the strings following my previous Liver Flushes (I always check BMs to see what might have come out of the liver) despite the fact that I eat only fruit, including bananas, on the morning before the flush as protein and fat can't be consumed
(3) The strings are black or at least dark and bananas are almost white, how would they change colour?