Higher Potassium Intake at Dinner Linked to Better Sleep: Japanese Study

A Japanese study suggests that a higher potassium intake, particularly at dinner, may improve sleep quality. Researchers analyzed dietary and sleep data from 4,568 Japanese adults and found an inverse association between total daily potassium intake and insomnia severity, with the effect being most prominent for potassium consumed at dinner. This might be because potassium aids muscle relaxation, neurotransmitter function, and blood pressure regulation. However, further research is needed to confirm causality and the specific mechanism behind the dinner-time effect.