Nutrition experts at American Samoa's LBJ Hospital say the increase in fast food restaurants and the advertising of unhealthy food is alarming.
The territory now has four United States fast food chains.
A United Nations report in 2004, said the most serious health issues in American Samoa are related to the increase in chronic diseases such as type II diabetes connected to improper nutrition and physical inactivity.
The director of Dietary Services, Laneta Ah Ping, is predicting obesity will increase, particularly among young people.
"Adding these fast food restaurants will not help solve the problem but it will encourage the problem, and that means you are looking at future generations of diabetes and high blood pressure, and all of the other chronic diseases."
