Adventist Health Studies (AHS) is a series of long-term medical research projects of Loma Linda University with the intent to measure the link between lifestyle, diet, disease and mortality of Seventh-day Adventists. Seventh-day Adventists have a lower risk than other Americans of certain diseases, and many researchers hypothesize that this is due to dietary and other lifestyle habits.This provides a special opportunity to answer scientific questions about how diet and other health habits affect the risk of suffering from many chronic diseases.