The Fasting FAQ: Practical and Social Solutions

When the Bible was written, the social and physical landscape was very different. There were no office donuts, no high-stress corporate meetings, and no social media food photography. Today, the choice to fast presents a set of practical and social challenges that the ancients didn’t have to navigate.

In this FAQ, we address the “on the ground” realities of Christian fasting in the 21st century.

1. Social Dynamics: How do I handle invitations?

Jesus’ instruction in Matthew 6:17-18 is clear: “Anoint your head and wash your face, that your fasting may not be seen by others.” But what happens when you are invited to a business lunch or a family dinner?

The “Glass of Water” Grace: You don’t need to make a grand announcement that you are “fasting for the Lord.” In many cases, you can simply attend, order a glass of sparkling water, and focus entirely on the conversation. Most people are busy with their own plates and won’t notice yours.

If you are pressed, a simple “I’m taking a break from food today, but I’d love to sit and catch up” is usually enough to satisfy curiosity without revealing your spiritual “secret.”

2. The Physical Reality: Bad Breath and Hygiene

As the body enters ketosis and begins the process of autophagy, it releases toxins. One of the side effects is a distinct “metallic” or “fruity” breath, and sometimes a coating on the tongue.

Practical Solutions:

• Hydrate Aggressively: Drinking plenty of water helps flush out the metabolites causing the odor.
• Tongue Scraping: Use a tongue scraper or your toothbrush multiple times a day.
• Natural Peppermint: A tiny bit of peppermint oil or a sugar-free natural mint won’t “break” the spiritual intent of the fast, but it will save your professional interactions.

3. Fasting in the Workspace: Brain Fog vs. Clarity

A common fear is that fasting will make you less productive at work. While you may experience some irritability or “brain fog” on the first day, the biological reality of BDNF (Brain-Derived Neurotrophic Factor) kicks in by day two or three.

Tips for Productivity:

• Schedule Deep Work: In the mornings, when your mental clarity is often highest, tackle your most complex tasks.
• Manage the “Hangry” Moment: If you feel a wave of irritability, step away from your computer. Take five minutes to pray or walk outside. Remember, you aren’t just “not eating”—you are practicing self-control.

4. Family and Spouses: Don’t be a Burden

If you are the primary cook in your home, fasting can be difficult. You are still called to serve.

The Strategy:

• Prepare Simple Meals: If you are fasting, don’t try to make complex 5-course dinners for your family. Stick to staples that don’t require constant tasting.
• The “Rule of Agreement”: If possible, discuss your fast with your spouse beforehand. Their support is invaluable, and they can help you maintain your “secret” when friends ask.

5. Can I drink coffee?

This is a point of spiritual debate. Physiologically, black coffee (no sugar/cream) does not break autophagy. Spiritually, the question is: Are you relying on caffeine to get through?

The Suggestion: If you are a heavy coffee drinker, try to taper off a few days before your fast to avoid withdrawal headaches. During the fast, if a cup of black coffee helps you maintain your focus for prayer, use it. But if the coffee becomes a substitute for God’s strength, consider switching to tea or water.

6. What if I fail?

Many people start a 3-day fast and break it after 18 hours due to a moment of weakness.

The Grace: Do not let the enemy use a “failure” to keep you from the practice. God is interested in your heart, not your record. If you slip up, repent, thank God for the 18 hours you did manage, and either continue immediately or try again next week.

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Next: Special Interest Guides: Fasting for Families and Careers