Solving your sleep woes with melatonin: From dosing instructions to timing supplementation, here's what you need to know about the natural sleep hormone. Melatonin poisonings on the rise for US kids People in the U.S. have steadily reached for more melatonin over the past couple of decades, with roughly two thirds of adults using it to help them sleep at some point in their Melatonin tells your body when its time to sleep, but too much screen time can lower its levels. Most people take before bed, but timing also matters! Taking it 1 2 hours before bedtime in What Happens to Your Body if You Take Too Much Melatonin? Taking Too Much Melatonin