The Science
Bananas provide magnesium and potassium, which can support muscle relaxation and nerve function, potentially aiding sleep quality. However, they are high in sugar (24% DV) and carbohydrates, which may cause blood sugar spikes that could disrupt sleep for some individuals, especially if eaten close to bedtime.
Recommendation
If you want to use bananas for sleep, eat a small portion earlier in the evening, and pair with a protein or fat source to stabilize blood sugar.