'Finally, another small correction: Despite what was reported, the Church revelation spelling out health practices (Doctrine and Covenants 89) does not mention the use of caffeine. The Church’s health guidelines prohibit alcoholic drinks, smoking or chewing of tobacco, and “hot drinks” — taught by Church leaders to refer specifically to tea and coffee.'
LDS Newsroom "Mormonism in the News: Getting It Right"
"And again, hot drinks are not for the body or belly." D&C 89:9