The practice of regular fasting as normal Christian behavior was taught by Jesus (Mt. 6:16–17, 9:15), exercised by the early church (Acts 13:2), and has been the regular discipline of believers throughout church history. The practice of fasting in Scripture usually includes, but is not limited to, abstinence from food (Dan. 10:3) and may be engaged in for varying durations—typically for no more than a few days at a time.

Abstaining from all food for extended periods of time is biblical, but was rare and unusual in Scripture (Ex. 34:28; 1 Kgs. 19:5-8; Lk. 4:2), and thus should never be undertaken without counsel and appropriate supervision. The same standard applies to an absolute fast (Esther fast—no food or water for three days) of any duration (Est. 4:16). The maximum length of an adult fast that is biblically supported is forty days without food for a male adult in good health, and three days without water. The Bible does not speak of children engaging in fasting food.

Though spiritual leaders may invite others to join in corporate fasting with a specific goal in mind and for a specific time, fasting can never be forced or made compulsory. In light of this, fasting is not a mandatory requirement for joining staff at the International House of Prayer, but we do promote and encourage it as a biblically and historically proven means of positioning our heart to receive more of God’s grace in the context of commitment to prayer and to the Word (Joel 2:15). The level at which a person engages in fasting (particularly food) should be determined according to age and with regard to any physical limitations. Those with a known or suspected physical disability or illness, or those with any history of an eating disorder, should never fast, except in consultation with, and under the supervision of, a qualified doctor. Pregnant or nursing mothers should not fast food or drink as it could negatively affect the health and development of their baby and their own personal health.

Minors are discouraged from fasting food and should never engage in fasting without express parental consent and oversight. Minors who desire to fast are encouraged to consider non-food abstentions, such as TV, movies, internet surfing, video games, and other entertainment. If older teenagers do fast food under their parents’ supervision, we encourage them to use juice and protein drinks to sustain them, out of consideration for their health and metabolism.

Participation in regular fasting as a lifestyle necessitates a healthy lifestyle on days when food is not being fasted and should include exercise and a proper diet. A “fasted lifestyle” is a disciplined lifestyle in which we steward our bodies and time with wisdom and diligence. Fasting is not only abstention; it is an exchange where we abstain from certain things in order to “feast” on God’s Word and prayer, whereby the abundance of His grace is made more readily available to us. When undertaken with this type of commitment, a fasted lifestyle is sustainable on a long-term basis, just as it was for Daniel and his friends (Dan. 1).

While the physical impact of fasting is real, the spiritual benefits of fasting are undeniable. Any fast undertaken must be done with spiritual wholeheartedness and wisdom when dealing with our physical body; we must count the cost honestly and honor the temple of the Holy Spirit. Whether we are partaking or abstaining, everything should be for the glory of God.

Physically Preparing for a Fast That Extends More Than Two Days

• Prepare your body for the fast and prevent constipation during and after the fast by eating certain preventative foods at least two days beforehand (even longer before an extended fast), such as: fresh fruit and raw vegetables, fruit or vegetable juices, oatmeal, etc.
  
  
• Eat smaller meals a few days prior to the fast.
  
  
• Avoid high-fat and sugary foods before the fast.
  
  
• Make your commitment and determine the length. You can fast in many different ways. Pray and ask God what He will give you faith for in terms of the duration of the fast.
  
  
• A Daniel fast, with vegetables and water, is good for those carrying a heavy workload.
  
  

Helpful Hints for Your Fast (Physical)

1. Drink plenty of water. (Drinking at least half of your body weight in ounces of water per day is a good rule of thumb whether you are fasting or not.)
   
   
2. It is wise to abstain from strong stimulants such as caffeinated and sugary drinks during a fast, including the artificial sweeteners found in diet drinks. Also, avoid soy protein drinks, which have been known to cause health problems during a fast.
   
   
3. If you are on a juice fast, drink raw fruit juices such as apple, grape, and pineapple, which are excellent sources of necessary natural sugar to stabilize blood sugar and keep energy levels up. Orange and grapefruit juice are also good, but they are not recommended for arthritis or allergy sufferers. Monitor juice acidity carefully as it can cause canker sores (mouth ulcers). Raw vegetable juices such as carrot, celery, beet, or green vegetable combinations are excellent as well. Fresh fruit and vegetable juices can be made in a juice extractor or purchased ready-made (be sure to buy juices without any added sugars). Some of the benefits of drinking raw juice versus bottled are that it does not stimulate digestion (hunger) and it maintains all of its enzymes and nutritional value.
   
   
4. Expect some physical discomforts because of the detoxification process, especially on the second day. You may have fleeting hunger pains or dizziness. Withdrawal from caffeine and sugar may cause headaches, but it is a part of the detoxification process. Physical annoyances may also include weariness, tiredness, nausea, and sleepiness.
   
   During a fast, four major areas of the body are going through a detoxification process. Take care to attend to each of these:
   
   
5. The bowels/colon/large intestines: During a fast of three days or more, taking an herbal laxative (inquire at your local health store) or an enema before bedtime will help eliminate solid waste products; these can cause headaches and sluggishness if left in the body during a fast. This should be done early during the fast and then intermittently throughout the rest of the fast. The body begins detoxifying during a fast, depositing the toxins into the intestines. If you do not take a laxative or an enema, the toxins can hurt your intestines or reabsorb into your bloodstream, making you feel nauseous.
   
   
6. The kidneys: Drinking fruit juices, vegetable juices, broth, or just plenty of water will remove many toxins via the kidneys.
   
   
7. The lungs: If strength permits, walk half an hour during the day to help cleanse the lungs. Also do some deep breathing throughout the day by inhaling through the nose and exhaling through the mouth.
   
   
8. The skin: Since one-third of the waste products eliminated during a fast are removed via the skin, adequate bathing is essential. Use a natural bristle body brush or loofah sponge on your skin prior to bathing, to help cleanse the skin.
   
   

Helpful Hints for Your Fast (Spiritual)

1. Seek advice and permission before the fast. Seek medical advice before the fast, especially if you have any existing medical concerns or conditions. If you are under 18 years of age, discuss your desire to fast with your parents. Spiritual covering, submission, and unity are important factors when fasting. Discuss your plans with your church leaders. Remember, fasting is an attitude of the heart! Ask them if they would consider fasting with you.
   
   
2. Fast and pray in order to humble yourself and purify your worship. In fasting we are not trying to get something from God, but seeking to realign our hearts’ affections with His. In fasting we can more readily say, “We love you, Lord, more than anything in the world.” Lust of any kind is perverted worship, but fasting enables us to cleanse the sanctuary of our hearts from every other rival.
   
   
3. Don’t boast about your fast. Let people know you won’t be eating only if necessary (Mt. 6:16–18).
   
   
4. Do the fast with someone else. Two are better than one! We encourage parents and kids to consider fasting together. Several generations fasting together has a powerful impact.
   
   
5. Have a clear target as your prayer focus. Without a vision (a clear, prophetic prayer goal), the people perish. Write down your vision, so you can run with it (Hab. 2:2).
   
   
6. Take time to pray and read the Word. This may seem obvious, but busyness and distractions can keep you from devotions. Reading books with testimonies of victories gained through fasting will encourage you, too. Shaping History through Prayer and Fasting by Derek Prince, Fast Forward by Lou Engle, and God’s Chosen Fast by Arthur Wallis are just some of the books about fasting that are available.
   
   
7. Expect to hear God’s voice in the Word, dreams, visions, and revelations. Daniel prepared himself to receive revelation through fasting (Dan. 10:1–2). There is a fasting reward (Mt. 6:18).
   
   
8. Prepare for opposition. On the day of your fast you can bet that donuts will be at the office or in class. Your spouse (or your mom) will suddenly be inspired to cook your favorite meals. Press through. Many times you may feel more tension build at home. Satan tempted Jesus on the fast, and we must expect the same. Discouragement may come in like a flood, but recognize the source and take your stand on the victory of Christ.
   
   
9. If you fail, don’t give in to condemnation. The “to fast or not to fast” dilemma can be a major tool of the enemy. Even though you may fail several times, God always extends grace. Just hit the “delete” button and continue on your fast.
   
   
10. Feel free to rest a lot and continue to exercise with supervision.
    
    
11. Breakthroughs often come after a fast, not during it. Do not listen to the lie that nothing is happening. It is our conviction that every fast done in faith will be rewarded.
    
    

How to Successfully Break Your Fast

• Break your fast gradually. At this point you will need to exercise watchful self-control. Break your fast on a meal that is light and easy to digest (i.e., a pound of grapes, a shredded apple, watermelon, or steamed vegetables).
  
  

• When breaking a fast of ten days or more, the break-in period should be extended one day for every four days of fasting.
  
  

• A fast of three days or more should never be broken by eating a normal meal (including animal proteins, bread, sugar, dairy, and processed foods) because these heavy foods put a severe strain and shock on the digestive organs which have been resting throughout the fast. Eating too heavily after a fast can produce serious discomfort (stomach cramps, nausea, and weakness) and can nullify the physical benefits of fasting; it can also cause serious irreversible complications or even death.
  
  

• After breaking an extended fast, continue drinking fruit or vegetable juices because the stomach is continuing to detoxify.
  
  

• During any fast exceeding two days, your stomach will shrink. Do not over-expand it again by overeating. If you have been prone to eating too heavily, guard against going back to this habit. If you train yourself to eat more lightly, your stomach will adjust itself accordingly.
  
  

• While continuing to drink fruit or vegetable juices, add the following:
  
  

• Take extra care in breaking a water fast. Begin with drinking fruit or vegetable juices and gradually ease into eating fruit and steamed vegetables.
  
  

• It is important after a fast to begin to discern between real hunger and cravings so you do not feed your cravings.