Ellen G. White advocated for a vegetarian diet (not vegan). Read more about Adventist diet here:
http://www.ivu.org/history/adventists/white.html. The Adventist health message goes far beyond diet (includes exercise, use of plenty of fresh water, sunlight, temperance/moderation of the use of all healthy things and foods, fresh air, plenty of rest (including on the Sabbath), and trust in God. Adventist health principles including vegetarian diet are some of the reasons Adventists are almost always included in longevity studies.
http://edition.cnn.com/videos/world/2015/02/20/spc-vital-signs-art-of-aging-a.cnnhttp://www.bbc.com/news/magazine-30351406http://www.huffingtonpost.com/2014/07/31/seventh-day-adventists-life-expectancy_n_5638098.htmlStatistics have shown that religion makes people happier, but it turns out it can help you live longer, too.
In an attempt to "reverse engineer longevity," Dan Buettner has spent years researching the parts of the world where people live much longer than average. Most of those locations are outside the United States -- including Sardinia, Italy, and Okinawa, Japan -- but there is one long-living group stateside. It's the Seventh-day Adventists, who live an average of 10 years longer than the American life expectancy of about 79 years.
http://www.cbn.com/cbnnews/healthscience/2015/February/Secrets-to-Longevity-Revealed-in-Denominations-Lifestyle/http://ngm.nationalgeographic.com/ngm/0511/feature1/What if I said you could add up to ten years to your life? A long healthy life is no accident. It begins with good genes, but it also depends on good habits. If you adopt the right lifestyle, experts say, chances are you may live up to a decade longer. So what's the formula for success? In recent years researchers have fanned out across the globe to find the secrets to long life. Funded in part by the U.S. National Institute on Aging, scientists have focused on several regions where people live significantly longer. In Sardinia, Italy, one team of demographers found a hot spot of longevity in mountain villages where men reach age 100 at an amazing rate. On the islands of Okinawa, Japan, another team examined a group that is among the longest lived on Earth. A
nd in Loma Linda, California, researchers studied a group of Seventh-day Adventists who rank among America's longevity all-stars. Residents of these three places produce a high rate of centenarians, suffer a fraction of the diseases that commonly kill people in other parts of the developed world, and enjoy more healthy years of life. In sum, they offer three sets of "best practices" to emulate. The rest is up to you.
http://www.oregonlive.com/living/index.ssf/2012/05/seventh-day_adventists_health.htmlLong before the culture around them embraced vegetarian diets, the search for vitamin D and the elusive goal of a good night's sleep, Seventh-day Adventists had staked their lives on health principles laid down by their founders more than 150 years ago.
Ellen White, who wrote scores of books for her fellow Adventists, summarized the "Eight Laws of Health" in the 1860s. Today, as many mainstream Christian denominations are losing members in the United States, Adventists are growing steadily, partly because of their emphasis on wellness.