This sweet, soft, and creamy fruit is known all over the world for its sweet taste and remarkable benefits. Eating bananas can help treat and prevent diseases. If bananas dominate your diet, your stomach has little room for other healthy foods. The substance found in many foods, such as cheese, fish, meat, and bananas, triggers migraine headaches. Bananas can cause drowsiness, even if you start the day with them. They are rich in tryptophan, an amino acid that can separate mental function and reaction time. Bananas cause damage to children's teeth.