20. Cheer up!
Thanks to the tryptophan found in bananas, these fruits do more than just nourish and keep us healthy; they also play a role in making us happy. Tryptophan helps the body produce serotonin and dopamine, neurotransmitters that contribute to feelings of happiness. Given that banana peels also contain beneficial nutrients, why waste them? After giving them a thorough wash, consider using the entire fruit, peel included, in your next banana shake. This way, you maximize the health benefits from every part of the banana.