Source Naturals Melatonin3 mg - 120 Vegetarian Capsules Source Naturals Melatonin can be used for occasional sleeplessness. Source Naturals Melatonin is a neurohormone produced in humans by the pineal gland. A favorite of travelers, Source Naturals Melatonin governs the body's circadian rhythms, helping the body ease into restful sleep. Source Naturals Melatonin is also a potent antioxidant. Source Naturals Melatonin addresses the following body systems: Antioxidant Defens Metabolism/Hormones Cognition / Nerves Immune Antioxidant DefenseFree radicals are unstable, destructive molecules with one missing, unpaired electron. In a process called oxidation, the same process that turns iron to rust, free radicals can impact cells as they steal electrons from healthy molecules, starting a cascade that ages the body and affects the body cell by cell, tissue by tissue. This process is halted with antioxidants. Antioxidants selflessly donate their electrons to stabilize free radicals and prevent their effects. Free radicals are natural by-products of mitochondrial energy generation and they are also the result of constant bombardment by pollutants, toxins, excess sunlight, unnatural foods, and electromagnetic radiation. Metabolism/HormonesAt any moment, millions of biochemical reactions are taking place in or around our nearly 100 trillion cells. To function at high levels of health, our metabolism is constantly binding molecules together and breaking them apart. In a way, our health is a function of the ease, speed, and coordination of these myriad reactions, processes named methylation, acetylation, phosphorylation, and sulfation. Hormones are messengers that tell the body to begin its various physiological activities, such as growth or sexual development. Hormones are produced in our glands and are often triggered by the brain. They are part of the intricate mechanism that makes us humans with unique personalities.