Magnesium may help some people feel it’s easier to fall asleep, usually through indirect pathways—muscle relaxation, stress modulation, and correcting deficiency—rather than a strong sedative effect. Responses vary widely. If insomnia is driven by late caffeine, irregular schedules, screen exposure, anxiety, or sleep apnea, magnesium alone may not make a big difference. A sensible plan is to optimize sleep hygiene first, then consider a modest dose of a well-tolerated form. If nighttime diarrhea occurs, adjust the form or dose. Chronic insomnia warrants professional evaluation.