The church believes in consuming only things that come from whole foods. One Mormon relative prepares and bakes delicious bread. Another cans all varieties of fruit and vegetables. Until a few years ago, this would have been an unusual process for many. But with the advent of organic farms and a movement to return to healthy eating, the rest of the country is catching up.
In a recent article in the Salt Lake Tribune the Church clarifies the position on Caffeine. Used to be, at least in the Mormon homes I've visited since I was very young, that Coke products containing caffeine were not allowed. But in this religious practice that continues to evolve a new understanding of the doctrine has come out: only hot drinks containing caffeine are prohibited.