Loma Linda University's School of Public Health runs the Adventist Health Studies, a series of long running cohort studies that have followed tens of thousands of Seventh-day Adventists over decades, making Adventist populations among the most intensively studied religious groups in the entire field of epidemiology. The studies exist because Adventist communities offer researchers something genuinely rare: a large population sharing religiously motivated dietary and lifestyle practices, many of them vegetarian and nearly all abstaining from tobacco and alcohol, whose health outcomes can be compared against the general population with those variables substantially controlled.
The research has produced findings with influence well beyond Adventist circles, contributing significantly to the broader epidemiological evidence linking diet, particularly plant based diets, to reduced rates of several chronic diseases, findings that get cited in nutrition science generally rather than only in literature about Adventism specifically.
The arrangement is a genuine partnership between religious practice and scientific research rather than research conducted on an unwitting population: participants are drawn from a community whose own institution, Loma Linda University itself, designs and runs the studies, giving the work an unusually direct connection between the religious community being studied and the researchers doing the studying.