A year ago, in a season of worship and prayer, I felt a very specific prompting: look up every form of cellular damage that comes from trauma and chronic stress. So I did. The list was sobering and familiar. Shortened telomeres, damaged mitochondria, impaired DNA repair, chronic inflammation, disrupted immune signaling, hormonal dysregulation, accelerated biological aging.
Then came a second prompting. Now look up what fasting does to the cells. What I found stopped me completely. Every form of damage on the first list had a corresponding restorative mechanism on the second. The two lines lined up with a precision that did not feel like a coincidence. It felt like a design that had been written into the body from the beginning, waiting to be recognized. Fasting is not a trend. It is not a biohacking strategy. It is a God-designed mechanism for restoration, one that Scripture established long before science could explain it.
Four processes worth understanding
Mitochondria are the energy-producing structures inside nearly every cell, generating more than ninety percent of the energy your cells need. When they are damaged by trauma, chronic stress, toxins, or poor nutrition, you feel it as fatigue, brain fog, and poor healing. Telomeres are the protective caps at the ends of your chromosomes, like the plastic tips on a shoelace. They shorten naturally with age, but chronic stress accelerates that, making the body biologically older than its years.
Autophagy is your body's built-in recycling system, a deep internal cleanup where damaged proteins and debris are broken down and reused. Mitophagy is a focused form of that, selectively removing damaged mitochondria so healthier ones can take their place. Fasting is one of the most powerful activators of both. Put simply, what trauma disrupts, fasting is designed to restore.
Where fasting fits in practice
I did not come to fasting looking for another health trend. I came to it slowly, through experience and necessity. Intermittent fasting became the natural third step in the sequence I teach: remove inflammatory foods, balance your macronutrients, and then use intermittent fasting as a sustainable daily rhythm. For many women those three steps alone create dramatic improvements in energy, weight, and hormones. And fasting should always be individualized and adjusted for your season. When I unexpectedly became pregnant during a longer fast, I modified it and completed it safely. Wisdom and flexibility are part of the practice, not exceptions to it.
The invitation goes deeper than biology
Before fasting was ever studied in a lab, it was established in Scripture as a means of alignment. From the beginning, fasting was not about deprivation. It was about order, boundaries, and submission. In Genesis, even in a garden of abundance, there was one boundary, and it was protective. Fasting, at its core, is the voluntary submission of appetite to restore proper order. It is not self-punishment. It is recalibration. When appetite is unchecked, it quietly becomes a governing force. When appetite is submitted, authority is restored.
Throughout Scripture, fasting preceded breakthrough. Moses fasted before receiving the law, Elijah before encountering God's presence, Esther before approaching the king, and Jesus before beginning His ministry. Jesus assumed it would be part of our lives. He did not say if you fast, but when you fast, and in Matthew 6 He warns against doing it for show. Isaiah 58 gives the clearest picture of all, where God rejects a fast because the people's hearts were unchanged, then promises that true fasting, the kind that loosens chains and turns us toward others, brings healing that quickly appears. That promise is not spiritual alone. Healing is whole.
Fasting also has a way of exposing what has quietly mastered us, whether food, distraction, or control, and of creating space for forgiveness and emotional healing. When the noise quiets, what rises to the surface is not failure. It is revelation. Fasting does not erase trauma, but it moves the body and the soul toward integration, and it does so through mechanisms the same God wrote into you from the start.
This post is drawn from Chapter 8 of my book, Where Faith Meets Medicine, where I lay out the full science of fasting, the Scriptural foundation, and a practical, safe framework for different seasons of life.
