The word Indian is for people from the country of India. The word indigenous is used to describe native peoples of the land who lived there before the arrival of colonizers.
However, some people use "Indian" for indigenous people. It is not correct, but people do it anyway - this is because the earliest European colonizers of the Americas mistakenly called the native people "Indians."
Members of the indigenous peoples of the United States can be called Native Americans.
You can read more about the history of names for native peoples here: http://en.wikipedia.org/wiki/Native American name controversy
Mangoes are rich in Vitamin E, which helps increase and improve the sex drive in humans.Mango fruit benefits also include reducing cholesterol and preventing diabetes. I know you would be surprised reading this, but it is true. Mangoes contain natural sugar, and each has nearly 31gms of sugar, but at the same time it is low onandglycemic load, this means that it the blood sugar is not affected.