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.
What does it do? Melatonin appears to be important in helping regulatethe internal body clockâs cycle of sleep and wakefulness.Other claims are made for it: it has anti-oxidant and freeradical scavenging properties and some say it has anti-cancer and anti-ageing effects, but there is no proof forthis in humans.