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.
Melatonin works by triggering chemical receptors in the brain to encourage sleep. Melatonin is available by prescription only and is given as a short-term treatment of insomnia in people age 55 and over.The medicine should not be used for longer than 13 weeks.elatonin is not recommended for people with allergies or sensitivity to any of the medicine's ingredients, or who have problems with the immune system, kidney or liver problems. Alcohol should be avoided while taking melatonin.