1.Be careful if you see a “black dot” on the tip of a banana.
The “sugar spot,” a black spot on the banana peel, is a sign that the banana is ripe and rather ready to eat. However, if there is a black spot at the tip and even the inside of the peel is discolored black or red, be careful. This is not a sign of ripeness, but rather a sign that the inside is infected with mold such as “Nigrospora”. This mold toxin is heat-resistant, and heating does not eliminate the toxin. If ingested by allergic people, it may cause abdominal pain and urticaria. Always check the contents after peeling, and dispose of them if they have turned black or red. In fact, there are still some unexpected danger signs lurking in foods we eat because we think they are “safe.
