Christian Fasting Guide: Types of Fasting, How to Start, and What Happens Spiritually

Fasting is one of the most ancient and powerful spiritual disciplines in Christian practice — and one of the least practiced in the modern Western church.

It's also one of the most misunderstood. People assume it's about earning favor with God, demonstrating spiritual seriousness, or losing weight while feeling holy. It's none of those things.

This guide covers what fasting actually is, why it matters, the different types, and how to do it in a way that's both spiritually meaningful and physically safe.

What Fasting Is (and Isn't)

Fasting is voluntarily abstaining from food (or another good thing) for a specific period, for spiritual purposes.

Several things worth unpacking:

Voluntarily. Fasting is not the absence of food due to poverty or illness. It's a deliberate choice to abstain. The intentionality is part of what makes it fasting.

A specific period. Fasting has a beginning and an end. It's not open-ended self-starvation; it's a defined season of abstinence.

For spiritual purposes. This is the distinguishing mark. Fasting without prayer is just a diet. The hunger that arises from fasting is meant to be redirected — to heighten your awareness of God, to express dependence, to create space for prayer and hearing from God.

Fasting is not:

• A way to earn God's favor
• A spiritual technique that compels God to answer prayers
• A sign of superior holiness
• Primarily about the body (though it involves the body profoundly)

The Biblical Basis

Fasting appears throughout both Testaments. Moses fasted 40 days on the mountain (Exodus 34:28). David fasted in grief (2 Samuel 12:16). Elijah fasted 40 days on the way to Horeb (1 Kings 19:8). Daniel fasted (Daniel 10:3). Nehemiah fasted when he heard of Jerusalem's condition (Nehemiah 1:4).

Jesus fasted 40 days in the wilderness (Matthew 4:2). His disciples didn't fast while he was with them — "Can the guests of the bridegroom mourn while he is with them?" — but he expected they would after his departure: "when the bridegroom has been taken from them; then they will fast" (Matthew 9:15).

In the Sermon on the Mount, Jesus doesn't say if you fast — he says when (Matthew 6:16): "When you fast, do not look somber as the hypocrites do..." He assumes fasting is a regular practice of disciples, like prayer and giving.

The early church fasted. Acts 13:2-3: before sending Paul and Barnabas on their first missionary journey, the church "worshiped the Lord and fasted." Acts 14:23: Paul and Barnabas fasted when appointing elders in each church.

Types of Fasting

1. Full Fast (Water Only)

Abstaining from all food, drinking only water. This is the most intense form and is often practiced for one day (24 hours), for specific spiritual crises — a major decision, a desperate prayer, a crisis in the church.

Appropriate for: Healthy adults, short periods. Not appropriate for people with diabetes, eating disorders, pregnancy, heart conditions, or other medical conditions without physician approval.

2. Partial Fast (Restricted Food)

Eating less than usual or restricting specific foods. The Daniel Fast (see below) is the most well-known form — vegetables, fruit, and water, no meat or pleasant foods.

This form is practiced for longer periods — weeks, sometimes a 40-day Lenten season — and is more accessible for people who can't do a complete fast.

3. Intermittent Fast

Abstaining from food for specific windows each day — typically skipping breakfast and lunch, eating only in the evening. The ancient church fasted on Wednesdays and Fridays; in Eastern Orthodoxy, this continues as a practice.

This form allows for sustained fasting practice integrated into normal life, without the intensity of full multi-day fasts.

4. The Daniel Fast

Based on Daniel 1:8-16 and Daniel 10:3, the Daniel Fast restricts food to:

• All fruits and vegetables
• Whole grains, legumes, nuts, seeds
• Water and natural juices
• Excluded: Meat, dairy, sweeteners, leavened bread, caffeine, alcohol, processed foods

Typically practiced for 10 or 21 days, the Daniel Fast is widely used for corporate church fasting at the beginning of the year.

5. Media Fast / Non-Food Fasting

Abstaining from a non-food appetite — social media, entertainment, news, recreational internet — for a specific period. This form is increasingly relevant as screen time and digital distraction have become significant obstacles to prayer and presence with God.

Less physically demanding but spiritually legitimate: you're choosing to abstain from a good thing in order to create space for God.

What Happens Spiritually When You Fast

Fasting isn't magic — it doesn't compel God to act or cause automatic spiritual experiences. But the tradition consistently reports certain things that happen when people fast:

Clarity of focus. When you're hungry and not eating, the hunger becomes a reminder to pray. Fasting redirects the part of your attention that normally goes to food — planning meals, enjoying eating, snacking — toward God. Multiple times a day, your body reminds you that you're fasting, which means multiple times a day you can return your attention to your prayer intention.

Exposure of hidden dependencies. Fasting reveals what you've been using food (or whatever you're fasting from) to numb, comfort, or manage. Many people discover that they eat not just from hunger but from boredom, anxiety, stress, or loneliness. Fasting surfaces these patterns.

Increased sensitivity. Many people report heightened spiritual sensitivity during fasts — a greater sense of God's presence, more vivid prayer, dreams or impressions they find significant. This isn't universal, but it's common enough to be worth noting.

Identification with suffering. Fasting connects you physically to the experience of those who go without food not by choice. It creates empathy. Isaiah 58 connects fasting with justice: "Is not this the kind of fasting I have chosen: to loose the chains of injustice and untie the cords of the yoke...?" The fast that God honors includes solidarity with the poor.

Humility before God. The self-denial of fasting is an embodied acknowledgment that you are a creature, not a creator — dependent on God, not self-sufficient. This is spiritually orienting.

How to Start

Before any fast:

• Consult your doctor if you have any medical conditions
• Tell someone you trust (for accountability and safety, not for show)
• Set a clear prayer focus — what are you praying for during this fast?
• Set a start and end time

For a first fast: Start with a partial fast: skip one meal and spend that mealtime in prayer. This is a 3-4 hour window of fasting. Manageable, instructive, a real beginning.

When you're ready: a 24-hour fast from dinner to dinner, drinking water and (some traditions allow) black coffee or herbal tea.

During the fast:

• Pray when you feel hunger — redirect the hunger toward God
• Read Scripture more than usual; your mind is often clearer without digestive distraction
• Reduce unnecessary activity (fasting while running your hardest day at work is possible but not ideal)
• Drink plenty of water

Breaking the fast: Break slowly, especially after longer fasts. Start with juice, broth, light fruit — not a burger. Your digestive system needs time to restart.

A Final Note on Motive

Matthew 6:16-18: "When you fast, do not look somber as the hypocrites do, for they disfigure their faces to show others they are fasting... But when you fast, put oil on your head and wash your face, so that it will not be obvious to others that you are fasting, but only to your Father, who is unseen; and your Father, who sees what is done in secret, will reward you."

The whole point of Jesus's instruction is hiddenness. Fasting that is performed for others — posted on social media, mentioned in conversation, worn on the face as suffering — has already received its reward. Real fasting is between you and God.

The "reward" Jesus promises is not a specific answered prayer. It's the reward that comes from being someone who practices real, hidden, humble devotion: the deepening of your actual relationship with God, the formation of a character that doesn't need to perform.

Fast. Keep it quiet. Let God meet you there.

Related: Daniel Fast Complete Guide | How to Pray as a Beginner