Adventist Health Studies (AHS) is a series of long-term medical research with the objective of establishing the link between lifestyle, diet, disease risk and mortality. Two studies involving 24,000 and 34,000 Seventh Day Adventists in California were conducted over the last 40 years. Researcher's attention was caught by this religious group because of their relatively lower risk of certain disease compared to other Americans.
These studies served as dietary reference among Lifestyle Medicine Practitioners globally. It has also been the subject in the National Geographic Article "Longevity: The Secrets of a Long Life."
Both studies show the role of dietary behaviors in the development of chronic disease. The more a person stick to a whole food, plant-based diet, the lower the disease risk and mortality.