sell caffeine. 

http://www.mormonismi.net/kirjoitukset/larry_king_1998.shtml

CALLER: I was wondering about some of the guidelines in dietary restrictions Mormons live by, and how strictly members follow it. Because I was reading, once, the word of wisdom. My impression was that its major point was that one should respect all life, including animals and, as such, only consume them when absolutely necessary to sustain life, and to then eat them sparingly. But I've noticed that Mormon -- this is rarely followed by Mormons, and I'm wondering if this has anything to do with, as reported by "TIME" magazine.

LK: OK, president?

GBH: Oh, I don't know. You've read a part of the word of wisdom. The word of wisdom covers many things. It covers the excessive use of meat, as I see it. It covers, in a very particular way, the use of tobacco and alcohol.

LK: By saying no?

GBH: By saying, by proscribing those things.

LK: No to caffeine?

GBH: No to caffeine, coffee and tea.

LK: Do you know why? Dietary -- in the Old Testament were based on the health of animals and stuff.

GBH: Well, the wonderful thing is that the Book of Mormon -- I mean, the word of wisdom has shown to be fruitful in what -- the accomplishments.

LK: You are ahead of yourself in the health craze?

GBH: Yes, this man I met here not too long ago at UCLA, Inkstrom (ph), I think his name is, who has conducted a study for some 14 years, taking a peer group of Latter-day Saints, a peer group of the other population, and reached a conclusion that because of the degree to which we observe the word of wisdom, Mormons have a life expectancy of from eight to 11 years longer. Now, who in the world wouldn't give almost anything for eight to ten years of life? I have here with me, right now, a statement from "The Los Angeles Times" on this very fact. "The study conducted by UCLA tracks the morality rates and health practices of nearly 10,000 California high priests and their wives for 14 years. As a follow up to research Inkstrom published in 1989, the study confirms that the healthiest active Mormons have a life expectancy that is eight to 11 years longer than that of the general white population in the U.S.," close quote.