Native Americans served in World War I even though they were not citizens of the United States. In fact, it was not until after World War II in the 1965 passage of the Voting Rights Act that all states were required to allow Native Americans to vote on the same basis as any other American.
Overview. Melatonin is a hormone secreted by the pineal gland in the brain. It helps regulate other hormones and maintains the body's circadian rhythm. The circadian rhythm is an internal 24-hour clock that plays a critical role in when we fall asleep and when we wake up. When it is dark, your body produces more melatonin.
A: Melatonin is an over-the-counter dietary supplement marketed to help induce sleep. Melatonin is commonly used to relieve jet leg, insomnia, and trouble sleeping due to shift-work. Taking melatonin will decrease the time it takes to get to sleep, but will not increase the quality of sleep a person has.