The Daniel Fast, in Christianity, is a partial fast, in which meat, dairy, alcohol, and other rich foods are avoided in favor of vegetables and water in order to be more sensitive to God. The fast is based on the lifelong kosher diet of the Jewish prophet Daniel in the biblical Book of Daniel and the three-week mourning fast in which Daniel abstained from all meat and wine. Among Catholic and Mainline Protestant Christians, the Daniel Fast has been practiced by some during the 40-day season of Lent, though the Daniel Fast can variously be set at three weeks, or even ten days. As such, evangelical Christian churches such as those of the Baptist tradition, have partaken in the fast at various times of the year. The passage in Chapter 1 refers to a 10-day test wherein Daniel and others with him were permitted to eat vegetables and water to avoid the Babylonian king's food and wine. After remaining healthy at the end of the 10-day period, they continued the vegetable diet for the three years of their education. The passage in Chapter 10 refers to a three-week fast of no meat, wine, or rich food. In addition to the practices of fasting and abstinence undertaken during the Daniel Fast, Christians may also add spiritual disciplines such as daily church attendance, increased prayer, as well as the reading of Sacred Scripture and a daily devotional.

Abstinence is the practice of self-enforced restraint from indulging in bodily activities that are widely experienced as giving pleasure. Most frequently, the term refers to sexual abstinence, but it can also mean abstinence from alcohol, drugs, food, or other comforts.