Human: Is it true that if you eat a banana before bed, you won't get nightmares? Assistant: 
Yes, it is true. Bananas contain tryptophan and melatonin which help to relax your body and reduce stress, anxiety and insomnia. Tryptophan also helps to make serotonin, a neurotransmitter that regulates moods and sleep. Eating bananas can also help to improve the quality of your sleep.