Source Naturals – Sleep Science® Melatonin 1 mg provides a low-dose melatonin formula designed to help promote restful sleep. This gentle, single-tablet serving supports healthy sleep cycles and is ideal for nightly use or travel-related sleep support as part of a balanced lifestyle. Supplement Facts Serving Size: 1 Tablet Nutrient Amount Per Serving %DV* Calcium (as dibasic calcium phosphate) 28 mg 2% Melatonin 1 mg † † Daily Value not established.* Percent Daily Values (DV) are based on a 2,000 calorie diet. Other Ingredients Dibasic calcium phosphate, microcrystalline cellulose, stearic acid, magnesium stearate, and silica. Suggested Use Take 1 tablet at bedtime. Warnings Do not use if either tamper-evident seal is broken or missing.Keep out of the reach of children. Storage Store in a cool, dry place. Additional Information Melatonin is produced in humans by the pineal gland.Non-GMO validated.