Fasting has been a part of religious ritual for millenia. This practice is not specific to only one religion, and the world's religions agree on the primary motivation for fasting--sacrifice. The Daniel fast is specific to the Christian and Jewish religions and has more to offer than a typical fast.
Biblical Context
The biblical reference to the Daniel fast can be found in chapter one of the book of Daniel in the Bible. The author of the book portrays Daniel fasting on two other occasions, chapters two and 10, though it probably was not the same kind of fasting. Daniel and his friends asked to fast instead of partaking of the king's rich foods.
Purpose
The purpose of the fast has traditionally been to draw nearer to God through sacrifice, but Daniel and his friends fasted in order to maintain physical health.
Foods
The Daniel fast limits food consumption to fruits and vegetables for three meals a day or less. Liquid intake should consist only of fruit juice and water. Minister Wellington Boone believes the duration of the fast should be determined by the individual partaking of the fast. Daniel and his friends fasted for three weeks.
Side Effects
Boone cautions that while the body is adjusting to the new dietary restrictions, there may be a headache or dizziness due to sugar or caffeine withdrawal. There may be cravings for the first few days.
Warnings
Medical counsel is strongly encouraged for those who are determining whether or not they should begin a Daniel fast. Pregnant or nursing women and people with diabetes should not undergo this fast.



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