“My flesh and my heart may fail, but God is the strength of my heart and my portion forever.” —Psalm 73:26
Fasting is a mechanism of denying self and focusing on God, found in scriptures. When done with the proper mindset, there is a clarity that can be achieved, and both physical and spiritual benefits enjoyed through fasting.
It is not like western medicine to recommend such an age old practice for multiple reasons. If someone were to get lightheaded and pass out on this recommendation, exercise to hard, or approach it unwisely, the doctor could be sued. This is coupled with western cultures ignorance of nutrition, preventative maintenance, and its penchant for treating symptoms with drugs rather than healthy food, exercise, and healthy living.
A clean fast would consist of water, coffee, green tea, and perhaps a bit of salt if needed. This is most difficult, but creates the best health benefits while engaged in the practice. For anyone struggling with eating disorders, it would of course be wise to temper what I say with wisdom and your own situation, because any type of fasting is not slated to be starvation, but instead, strategic subtraction for an intended purpose. That being said, with a proper scheduled time of fasting, the benefits soar with little actual threat to the health of the individual.
All the noise, all the cravings, all the “I’m dying” signals we feel after 12, 24, even 72 hours? They’re not rooted in need—they’re rooted in conditioning. Physiologically, the body is fine—better than fine, it’s healing, adapting, cleaning house. But the mind? The ego? The flesh? We’ve so deeply confused comfort with safety that anything that removes indulgence feels like danger—even when it’s actually life-giving. “Man does not live by bread alone…”
We say we believe it—but fasting exposes whether we actually do.
Fasting is an ancient, built-in, God-ordained response to the very affluence and overindulgence that poisons our souls and bodies today. Not only that, it is a multi-faceted gift. Spiritually, it reorients; Fasting humbles the soul (Psalm 35:13). It confronts pride, distraction, and self-sufficiency. It teaches you to hunger for God, not just comfort or control. Keep in mind too, Jesus assumed His followers would do it:
“When you fast…” —not if (Matthew 6:16).
Physically, it restores. In a culture of constant input (calories, dopamine, stress), fasting creates pause, triggering autophagy, fat loss, Hormone regulation, Mental clarity, inflammation reduction, immune rejuvenation, and resets the body’s rhythms.
Culturally, fasting confronts. We live in a society addicted to immediacy, indulgence, and consumption. Fasting is resistance. It says: “I am not ruled by my cravings. My stomach is not my god. My comfort is not my goal.”
It is an anti-Babylon, a departure from excess. From Moses to David, from Esther to Daniel, from Jesus to Paul—fasting appears:
Before battle
Before calling
Before breakthrough
During mourning
During repentance
During consecration
It’s a time-honored tool in the life of God’s people—because it aligns us with dependence, clarity, power, and purity. In our culture today, where food is abundant, attention is scattered, and health is decaying—fasting is countercultural obedience that leads to both spiritual fire and physical healing—definitely one of God’s answers for modern man.
Theologically we have precedence to fast, and this was done in obedience, without the physiological understanding we possess today:
Humility & Dependence
Joel 2:12–13 (ESV)
“Yet even now,” declares the Lord, “return to me with all your heart, with fasting, with weeping, and with mourning; and rend your hearts and not your garments.”
Return to the Lord your God, for he is gracious and merciful, slow to anger, and abounding in steadfast love; and he relents over disaster.
Ezra 8:21 (ESV)
Then I proclaimed a fast there… that we might humble ourselves before our God, to seek from him a safe journey for ourselves, our children, and all our goods.
Wisdom, Guidance & Decision-Making
Acts 13:2–3 (ESV)
While they were worshiping the Lord and fasting, the Holy Spirit said, “Set apart for me Barnabas and Saul…” Then after fasting and praying they laid their hands on them and sent them off.
Acts 14:23 (ESV)
And when they had appointed elders for them in every church, with prayer and fasting they committed them to the Lord in whom they had believed.
Fasting wasn’t occasional—it was part of the disciples’ rhythm for hearing God clearly.
Spiritual Warfare & Strength
Matthew 4:1–2 (ESV)
Then Jesus was led up by the Spirit into the wilderness to be tempted by the devil. And after fasting forty days and forty nights, he was hungry.
Jesus didn’t fast to weaken Himself—He fasted to strengthen Himself before temptation.
He fought Satan with Scripture in His mouth and emptiness in His stomach—and still had more authority.
Clarity, Power & Breakthrough
Matthew 6:17–18 (ESV)
But when you fast, anoint your head and wash your face, that your fasting may not be seen by others… And your Father who sees in secret will reward you.
Daniel 9:3 (ESV)
Then I turned my face to the Lord God, seeking him by prayer and pleas for mercy with fasting and sackcloth and ashes.
Mark 9:29 (ESV, KJV reference)
“This kind cannot be driven out by anything but prayer and fasting.”
But, how remarkable it is that we know so much about the actual health benefits today when we commit to this ancient practice:
Autophagy takes place, literally meaning self-eating, is when our body starts breaking down old, damaged cells—junk proteins, cellular debris, even pre-cancerous cells. Autophagy targets misfolded proteins (like those associated with Alzheimer’s and Parkinson’s); Damaged mitochondria (energy factories of your cells); Viral remnants and possibly pre-cancerous cells; Debris from oxidative stress; Old immune cells and inflammatory materials.
Ketosis takes place after about 36 hours, when glycogen stores are depleted. It is perfectly designed to begin fueling your body with ketones, a clean burning, anti-inflammatory fuel that uses your stored fat as energy. White fat is broken down into brown fat, and fat loss can take place between 0.5 and 1 pound per day (this is not an encouragement to use this as a method of fat loss overall, as after 90 hours, the body will have some diminishing health returns such as depleted immune system, muscle loss, and high cortisol as you enter a survival mode).
Amazingly, after 24–48 hours, human growth hormone (HGH) can rise by 2–5x! This means recovery and lean tissue preservation is an automatic response to fasting. For those who are athletic, work out, and want to keep their gains, within the window of 24-90 hours, your HGH will work to maintain muscle mass while your body burns fat, effecting your overall body composition for the better! It’s like God built a system where once you focus on Him, the more efficient your body becomes—a reverse of the curse of indulgence.
Your insulin drops to almost zero, and your dopamine receptors reset, creating joys over small things, and deeper moments of prayer and meditation. It is truly a corrective and contemplative journey through a few days of discipline. “Man shall not live by bread alone, but by every word that comes from the mouth of God.” —Matthew 4:4
When done responsibly, and I’d add the disclaimer for those with diabetes, or health concerns to talk to a doctor, fasting not only gives you an opportunity to spend time with the Lord in a busy affluent culture, but to give your body a much needed moment of reset when pursuing your health goals. To further the benefits of autophagy, stick with water, coffees, green tea, and don’t add calories or proteins that might come from juices or bone broth (a dirty fast). Green tea contains EGCG, which has neuroprotective and anti-inflammatory effects, and caffeine from coffee increases lipolysis (fat breakdown) and thermogenesis. And with plenty of fat as rocket fuel for a slow steady body, and a sharp and calm mind, the surprising clarity that comes with a 72-80 fast will be a wonderful discipline to try.


