Magnesium is widely promoted as a natural solution for sleep problems and anxiety, but what does the scientific evidence actually show? Research suggests that magnesium plays an important role in the nervous system and may help support relaxation, sleep quality, and stress regulation. While it is not a sedative or a cure for anxiety, studies indicate that magnesium supplementation may provide modest benefits, especially for people with low magnesium intake, high stress levels, or poor sleep. In this article, we explore how magnesium affects the brain, what research says about its effectiveness, and how to use it safely as part of a healthy sleep routine.