The Daniel Fast: What It Is, What the Bible Says and How to Do It With Purpose

In this article

1. What the Bible says: two moments in Daniel's life
2. What Jesus and the prophets add
3. What can you eat on the Daniel Fast
4. How to do the Daniel Fast with purpose
5. Health precautions
6. A worked example: a youth leader's fast
7. Common mistakes on the Daniel Fast
8. A 21-day Daniel Fast reading plan
9. Questions for reflection or a small group
10. Frequently asked questions
11. Going further

Many people start the Daniel Fast with a food list and no clear reason, and it soon turns into a poorly planned diet. Here you will see what the book of Daniel actually says, what you can eat, how long the fast lasts and how to build a 21-day Daniel Fast with real purpose and a reading plan.

What the Bible says: two moments in Daniel's life

The name "Daniel Fast" does not appear in the Bible. It comes from two episodes in the book, almost seventy years apart, and they do not teach exactly the same thing.

Daniel 1: faithfulness in a foreign land

Daniel was a young man from Judah taken to Babylon by Nebuchadnezzar and chosen, with Hananiah, Mishael and Azariah, to serve in the palace. The king ordered that these young men receive food and wine from the royal table every day during three years of training (Daniel 1:5).

But Daniel purposed in his heart that he would not defile himself with the portion of the king’s meat, nor with the wine which he drank: therefore he requested of the prince of the eunuchs that he might not defile himself.

Daniel 1:8

The text does not explain why that food would defile him. Interpreters usually suggest meat forbidden by the law of Moses, food offered to idols, or a refusal to depend on the table of the king who had destroyed Jerusalem. What the verse makes clear is the decision: Daniel "purposed in his heart". The issue was faithfulness, not nutrition.

He did not rebel but proposed a test: "Prove thy servants, I beseech thee, ten days; and let them give us pulse to eat, and water to drink" (Daniel 1:12). The Hebrew word behind "pulse" means plant foods grown from seed. After ten days the young men looked healthier than the others (Daniel 1:15). But the text gives the credit to God: he gave Daniel favour with the chief of the eunuchs (Daniel 1:9) and gave the four of them knowledge and wisdom (Daniel 1:17). The menu is not the cause of the blessing.

Daniel 10: three weeks of mourning and seeking

The second episode comes in the third year of Cyrus, king of Persia (Daniel 10:1). Daniel, now old, seeks to understand God's plans for his people.

I ate no pleasant bread, neither came flesh nor wine in my mouth, neither did I anoint myself at all, till three whole weeks were fulfilled.

Daniel 10:3

This is where the 21 days come from. It was not a total fast but a season of mourning and prayer without the pleasures of the table (Daniel 10:2-3).

Then a heavenly messenger tells him that his words were heard "from the first day" he set his heart to understand and to humble himself before God (Daniel 10:12). So Daniel was not heard on day twenty-one. The next verse speaks of resistance from "the prince of the kingdom of Persia" for twenty-one days (Daniel 10:13). Christians differ on what this scene teaches about the spiritual realm, but agree that the answer was not bought by Daniel's effort.

Daniel 9: fasting tied to the Word

One chapter earlier, Daniel reads Jeremiah, understands the prophecy of the seventy years of Jerusalem's desolation (Daniel 9:2) and turns to God "by prayer and supplications, with fasting, and sackcloth, and ashes" (Daniel 9:3). A long prayer of confession follows: the fast grows out of Scripture and flows into prayer. And Daniel already prayed three times a day (Daniel 6:10): the fast was an intense season inside a life of prayer that already existed.

What Jesus and the prophets add

Jesus assumes his disciples will fast, but he forbids fasting as a performance: it is to be done for the Father, who sees in secret (Matthew 6:16-18).

The prophets remind us that fasting without a changed heart is empty. Joel calls the people to turn to God "with all your heart" and to "rend your heart, and not your garments" (Joel 2:12-13). Isaiah goes further: the fast God has chosen includes loosing the bands of wickedness, sharing bread with the hungry and bringing the poor into your house (Isaiah 58:6-7). A fast that does not change how you treat people has lost half its meaning.

What can you eat on the Daniel Fast

There is no official biblical list. Common practice follows the principle of Daniel 1 and 10: simple food, without the pleasures of the table. A typical Daniel Fast food list:

• Usually eaten: fruit and vegetables; beans, lentils, chickpeas; brown rice, oats and other whole grains; nuts, seeds and olive oil; water as the main drink.
• Usually set aside: meat, including fish, and often eggs and dairy; sweets and sugar; refined bread and pasta, fried and ultra-processed foods; coffee, soft drinks and alcohol.

A simpler version, giving up only meat, sweets and coffee, is not less spiritual. Paul reminds us that the kingdom of God is not meat and drink (Romans 14:17), and whatever we eat or drink should be done to the glory of God (1 Corinthians 10:31). The list serves the purpose, not the other way round.

How to do the Daniel Fast with purpose

1. Write down your reason in one sentence

A hard decision, a sin to leave, intercession, consecration. Daniel 1 grows out of a decision to be faithful; Daniel 10, out of a desire to understand God's will. It helps on the days you feel like quitting.

2. Choose the length and the format

The 21 days come from Daniel 10, but the same book also shows a ten-day period (Daniel 1:12). The first time, ten days done well beat twenty-one abandoned halfway. Decide beforehand what is in and what is out.

3. Prepare your home and your schedule

Shop the day before and talk with your family. Set a fixed time for prayer and reading, ideally time that used to go to elaborate meals or your phone.

4. Read, pray and write every day

Follow the reading plan below. Read a passage, pray from it and note what stood out, what to confess and whom you prayed for. If focus is hard, see how to keep a steady prayer life.

5. Turn the sacrifice into generosity

Isaiah 58:7 speaks of sharing your bread with the hungry. You can set aside what you saved on meat, sweets and coffee and give it to someone in need.

6. Finish with gratitude

On the last day, reread your notebook and give thanks. Return to normal eating gradually and choose one habit to keep.

Health precautions

Anyone with diabetes, high blood pressure or another health condition, pregnant or breastfeeding women and anyone on regular medication should talk with a doctor before starting. Anyone who has or has had an eating disorder should not fast from food, not even partially: choose a fast from other things. Teenagers and older adults should fast only with guidance. And do not go more than a day without drinking water: Esther's total fast (Esther 4:16) was exceptional. A biblical fast does not need to put your health at risk: if your body tells you to stop, adjust what you eat and keep on praying.

A worked example: a youth leader's fast

Imagine a youth leader torn over accepting a new role in his church. He applies the method:

1. Reason: to discern God's will about the new ministry and to be faithful in what he already has.
2. Format: 21 days without meat, sweets, coffee or soft drinks. His wife chooses to join him in the prayer only.
3. Schedule: 25 minutes at 6:30 a.m., when he used to read the news on his phone.
4. Reading: one chapter of Daniel a day for the first half, then Psalms. Reading Daniel 1:8, he notes that Daniel's faithfulness began with a small decision and realizes he has been avoiding a hard conversation with a colleague.
5. Generosity: his coffee money goes to the church's food collection that month.
6. Closing: on day 21 he rereads his notebook, talks with his pastor and decides with more peace. There was no extraordinary sign, but there was clarity and a new habit of prayer.

Common mistakes on the Daniel Fast

• Turning the fast into a diet, with the focus on weight lost.
• Thinking that 21 days oblige God to answer. Daniel 10:12 shows Daniel was heard on the first day.
• Making the fast a showcase, against Matthew 6:16-18.
• Arguing legalistically over every seasoning.
• Fasting while still treating people badly, forgetting Isaiah 58.
• Giving up after one slip. Start again the next day, without excessive guilt.

A 21-day Daniel Fast reading plan

• Days 1 to 4: Daniel 1 to 4. Faithfulness in a foreign land and the God who rules over kingdoms.
• Days 5 to 8: Daniel 5 to 8. Judgment on pride, prayer in the face of threat and the first visions.
• Days 9 to 12: Daniel 9 to 12. The prayer of confession, Daniel's mourning and the final hope.
• Days 13 to 16: Psalms 25, 27, 51 and 63. Prayers of people who seek God.
• Days 17 to 19: Isaiah 58, Joel 2 and Matthew 6. The fast that pleases God.
• Days 20 and 21: reread Daniel 1 and Daniel 10 and review your notebook.

Questions for reflection or a small group

1. In Daniel 1 the decision not to defile himself came before the ten-day test. What decision of faithfulness do you need to make before you fast?
2. Daniel was heard on the first day (Daniel 10:12). How does that change the way you pray during the fast?
3. Which attitude from Isaiah 58:6-7 could become part of your fast?
4. Which habit from these 21 days do you want to keep once the fast is over?

Frequently asked questions

What can you eat on the Daniel Fast?

Common practice includes fruit, vegetables, legumes, whole grains, nuts, seeds, olive oil and water. People usually set aside meat, sweets, refined bread, fried foods, coffee and alcohol. The guiding principle is the simplicity of Daniel 1:12 and Daniel 10:3.

Does the Daniel Fast have to last 21 days?

No. The 21 days come from Daniel 10, but Daniel 1 speaks of ten days. Choose a length you can keep safely and attentively.

Can you drink coffee on the Daniel Fast?

In the most common version, no, because coffee is seen as one of the pleasures of the table, like the wine in Daniel 10:3. If you depend heavily on caffeine, cut down gradually before you start.

How is the Daniel Fast different from other fasts in the Bible?

The Daniel Fast is partial: it removes certain foods for a period. The Bible also shows total fasts and corporate fasts. For the full picture, read what the Bible teaches about fasting beyond the Daniel Fast.

Going further

A daily guide helps you avoid giving up in the second week. For Spanish readers, our ebook on the 21-day Daniel Fast offers a reflection, prayer and passage for each day, and our Spanish 40-day prayer guide carries that season forward. If the scene in Daniel 10:13 raised questions, see spiritual warfare according to the Bible. For the background of the whole book, read how to understand the book of Daniel.

About the author

Vagner Soares · Presbyter with pastoral ordination · Mentor and digital entrepreneur

Vagner Soares is a presbyter with pastoral ordination, a mentor and a digital entrepreneur with more than 10 years of experience in technology, digital marketing and education.

Meet the authors