In this modern age of perpetual consumption—news, entertainment, food, and endless digital stimulation—the idea of voluntarily going without feels almost…radical. Yet for the earliest followers of Jesus, abstaining from food was not unusual or extreme. It was expected.
Fasting, once a central rhythm of Christian devotion, has quietly faded from many churches in the modern West. The discipline that shaped the spiritual lives of early believers, from the apostles to the church fathers, now appears only occasionally, often reduced to a short seasonal observance or as “giving something up” for Lent. But fasting once played a far deeper role in the Christian life.
Some scholars believe its disappearance may be one reason modern believers struggle to cultivate spiritual depth.
Fasting: A Discipline the Early Church Assumed
In the New Testament, fasting is not introduced as a novel practice but assumed to be part of a believer’s life. When Jesus addressed the subject in the Sermon on the Mount, He began with a simple phrase: “When you fast,” not “if you fast.”
Early Christians followed that assumption closely. The book of Acts records believers fasting when seeking God’s guidance or appointing leaders. In Acts 13, for example, the church in Antioch fasted and prayed before commissioning missionaries.
The practice soon became embedded in the rhythms of Christian worship. By the second and third centuries, fasting was widespread across the church. Some believers observed strict disciplines, abstaining from food until evening during certain seasons or days of the week.
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Ancient traditions even describe rigorous forms of fasting. One example, known as the “Black Fast,” required believers to consume no food or drink during the day and break the fast after sunset with prayer and a simple meal. This pattern was widely practiced in early centuries of Christianity, particularly during Lent.
Another early discipline, called xerophagy, limited meals to simple foods like bread, salt, vegetables, and water during certain fasting periods. Church documents such as the Apostolic Constitutions describe these practices as common expectations for believers preparing for major feasts or seasons.
In other words, fasting wasn’t considered extraordinary spirituality. It was ordinary Christianity.
The Modern Christian Gap
Yet today the practice is surprisingly rare in many Western churches.
Research from the Pew Research Center shows that only about 21% of adults in the United States say they fast for religious reasons during holy seasons or times of prayer.
Even among Christians specifically, participation remains relatively modest. Pew analysis found only about 27% of Christians report engaging in religious fasting, with Catholics far more likely than Protestants to observe the practice.