GNC Melatonin 10mg is a supplement that offers a natural way to support restful sleep! Your body naturally produces this hormone in your pineal gland and creates less of this sleep-influencing substance during the day and more at night. Melatonin 10mg for sleep may be beneficial if you have a sleep schedule that frequently changes. Every one-tablet serving provides 10mg of melatonin plus 76mg of calcium. This formula is free of gluten, dairy, wheat and soy to accommodate individuals with sensitivities to common allergens. As a dietary supplement, take one tablet before bedtime. Do not exceed recommended dosage in any 24-hour period.