People who use insulin or drugs like metformin need to eat regularly, warns Foroutan. "If you go too long between meals you risk having your blood sugar fall way too low, which could be incredibly dangerous.” Skipping breakfast or avoiding snacks can be especially bad for people with diabetes because having consistent meals can prevent spikes in blood sugar and strengthen the effectiveness of their medication.
Lastly, I always start each day (on fasting days I take them with my meal) with a dose of bioavailable multivitamins to fill any nutritional gaps. If you plan on doing the same in the future, just remember to go for all-natural and organic multi-vitamin because synthetic vitamins tend to have no oral bioavailability. New Chapter (the one I linked above) has a high oral bioavailability and is one of the best multis on the market.

When Jesus returns, fasting will be done. It’s a temporary measure, for this life and age, to enrich our joy in Jesus and prepare our hearts for the next — for seeing him face to face. When he returns, he will not call a fast, but throw a feast; then all holy abstinence will have served its glorious purpose and be seen by all for the stunning gift it was.


As far back as the 1930s, scientists have been exploring the benefits of reducing calories by skipping meals. During that time, one American scientist found that significantly reducing calories helped mice live longer, healthier lives. More recently, researches have found the same in fruit flies, roundworms and monkeys. Studies have also shown that decreasing calorie consumption by 30 to 40 percent (regardless of how it’s done) can extend life span by a third or more. Plus, there’s data to suggest that limiting food intake may reduce the risk of many common diseases. Some believe fasting may also increase the body’s responsiveness to insulin, which regulates blood sugar and helps control hunger.
"How long you fast is entirely up to you and the leadership of the Holy Spirit. The Bible gives examples of fasts that lasted one day or part of a day (Judges 20:26; 1 Samuel 7:6; 2 Samuel 1:12; 3:35; Nehemiah 9:1; Jeremiah 36:6), a one-night fast (Daniel 6:18–24), three-day fasts (Esther 4:16; Acts 9:9), seven-day fasts (1 Samuel 31:13; 2 Samuel 12:16–23), a fourteen-day fast (Acts 27:33–34), a twenty-one day fast (Daniel 10:3–13), forty-day fasts (Deuteronomy 9:9; 1 Kings 19:8; Matthew 4:2), and fasts of unspecified lengths (Matthew 9:14; Luke 2:37; Acts 13:2; 14:23)." -What Christians Need to Know about Fasting by Sam Storms
Aside from these official days of fasting, Jews may take upon themselves personal or communal fasts, often to seek repentance in the face of tragedy or some impending calamity. For example, a fast is sometimes observed if a sefer torah is dropped. The length of the fast varies, and some Jews will reduce the length of the fast through tzedakah, or charitable acts. Mondays and Thursdays are considered especially auspicious days for fasting. Traditionally, one also fasted upon awakening from an unexpected bad dream although this tradition is rarely kept nowadays.
When we pray and fast, God promises that He will liberate us. He will loose the chains of injustice. He declares that He’ll untie the cords of the yoke and will give the oppressed their long-awaited freedom. He will set us free from the bondage of what others think, making us realize that any comparison we make with others is a guaranteed fast track to misery. When we fast and pray, God steps in and frees us from the perceived alienation with Him that has kept us immobilized, fearful, and disobedient for so long. As you consider God’s call to fasting, perhaps for the first time, you may choose to start slowly, fasting and praying for only one day. Perhaps you’ll decide to fast and pray one day each week throughout the year where you declare that specific twenty-four hours as your time of obedience to be alone in the intimate presence of God. As you do, God will give you grace, comfort, and a new direction in your Christian walk. In the end you will be set free.
We begin this holy season by acknowledging our need for repentance and our need for the love and forgiveness shown to us in Jesus Christ. I invite you, therefore, in the name of Christ, to observe a Holy Lent, by self-examination and penitence, by prayer and fasting, by practicing works of love, and by reading and reflecting on God's Holy Word.[72]

Alternate-day fasting. Go back and forth between feasting days and fasting days. Eat like a king or queen one day, then eat nothing the next. This will probably be the most challenging fasting option for most people. If you try it, make sure you’re eating a ton on your feast days, otherwise you’ll fall into a major calorie deficit and you’ll likely feel miserable.
Is fasting worth the effort? A recent metanalysis combined the results of six studies of intermittent fasting found the average weight loss of 15.4 pounds was equal to continuous dieting but both were significantly better than no treatment. It’s hard to draw definitive conclusions based on the results of six studies. Since fasting is difficult for most people, even if it proved to be effective, it might not be a long-term solution to weight control. The 5:2 diet would be more acceptable than a strict fast but many folks would still be miserable on Mondays and Thursdays if they tried to follow Jimmy Kimmel’s example.
Another aspect of fasting for God is comparable to a person dedicating an action to a cause. For God and country was, at one time, a familiar declaration in the United States.  It implied that the action being taken was to answer a noble call and serve a higher motive, the expectation of reward or compensation being far removed. The motivation came from a spiritual, emotional and dedicated commitment to do what is right. Similarly, a fast may be undertaken for God because it represents a lofty act, a selfless commitment to an act considered meritorious and virtuous.
Fasting is always practiced prior to surgery or other procedures that require general anesthesia because of the risk of pulmonary aspiration of gastric contents after induction of anesthesia (i.e., vomiting and inhaling the vomit, causing life-threatening aspiration pneumonia).[1][2][3] Additionally, certain medical tests, such as cholesterol testing (lipid panel) or certain blood glucose measurements require fasting for several hours so that a baseline can be established. In the case of a lipid panel, failure to fast for a full 12 hours (including vitamins) will guarantee an elevated triglyceride measurement.[4]
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