The Church of Jesus Christ of Latter-day Saints (often referred to as the “Mormon Church” by the media) has a strict law of health called the Word of Wisdom. Though this code of conduct was given originally as a suggestion of how to live a more healthy life, it was eventually adopted as commandment later. The principle behind the Word of Wisdom is that we are all children of God and that our bodies are sacred gifts from Him. We should treat them with respect and reverence, taking care of them.
The Word of Wisdom is a modern-day revelation contained in a book of Mormon scripture called the Doctrine and Covenants. It warns against the harmful effects of tobacco and other drugs. It also counsels not to drink alcohol, coffee, or tea. It admonishes the sparing use of meat and points out the benefits of going to bed early and getting up early.
Continuing revelation has outlined more specific ways we should take care of our bodies, like abstaining from excessive piercings and tattoos. More articles will explain specific aspects of Mormon rules regarding health.