Mormons adhere to the Word of Wisdom, a health law or code that is interpreted as prohibiting the consumption of tobacco, alcohol, coffee and tea, while encouraging the use of herbs, grains, fruits, and a moderate consumption of meat. The Word of Wisdom is also understood to forbid other harmful and addictive substances and practices, such as the use of illegal drugs and abuse of prescription drugs. Mormons are encouraged to keep a year's supplies that include a food supply and a financial reserve. Mormons also oppose behaviors such as viewing pornography and gambling.