105 Hours Fasting: The 10-Day Water Fast That Collapsed After Four Days

105 Hours Fasting: The 10-Day Water Fast That Collapsed After Four Days

A 10-day water fast ended at 105 hours. A 31-year-old man, who had never fasted beyond 48 hours, documented his experience as the strongest argument against the epic nature of long fasts: hunger hit 10 out of 10 on day two, remained at 8 on day four, and after 96 hours, he had to sit on a workbench for ten minutes because he "could barely manage his life." Ketosis, often touted as a license, did not suppress his appetite. His declared goal was a spiritual and mental detox, not physical, maintaining his routine, work, and training.

What Happens Day by Day in a Water-Only Fast

Day one was textbook: hunger rated 7 out of 10, a fasted workout at 9 PM, and no strange sensations. He slept without hunger. Day two brought collapse: extreme fatigue and weakness, nausea in the first half of the day, and dizziness "like being drunk," leading him to skip training for antiestéticar of hypoglycemia while alone at home.

Day three saw hunger drop to 6.5 and the condition improve—less appetite, more fatigue—which the participant interpreted as entering ketosis after what he called the "keto flu": the depletion of glucose reserves and the metabolic shift. A detail rarely mentioned in guides: he noted difficulty taking deep breaths, as if his aerobic capacity had halved.

On day four, hunger returned to 8, and fatigue derailed all plans. At 96 hours, he insisted he was definitely in ketosis. With little accumulated body fat, he suspected his body had no reserves to draw from. He decided to stop.

Why Hunger Persists Even in Ketosis

Because entering ketosis is not a switch. The account points to something long-fasting practice often overlooks: with low body fat, the body has no reserves to draw from and maintains the hunger signal. The participant himself wrote that after 96 hours, he should have been in ketosis, yet his appetite, instead of disappearing, was unbearable.

There is another compatible reading. Without prior adaptation, the body suffers for four days from a fuel change it hasn't trained for. The calm he experienced—zero stress and zero anxiety throughout the fast, which he attributed to an empty stomach—coexisted with weakness. Mental tranquility and physical exhaustion can go hand in hand.

The Day He Broke the Fast: Three Eggs Weren't Enough

At 105 hours, he ate three fried eggs. Nothing. Two hours later, two more with butter. His stomach didn't register it: no satiety, no energy boost. At 6:00 PM, three more eggs and some walnuts. Same result. That night at work, he ordered two burgers, and at the first bite—before swallowing—he felt saliva production and an energy surge greater than from the previous eight eggs.

The self-diagnosis was immediate: bread and ketchup. Sugar. The next day, he started a strict carnivore diet—meats, fish, offal, eggs, butter, cheeses, nuts, and olive oil—with 5 kilos of meat bought to last until the end of the month.

Fasting Yes, but with Prior Metabolic Adaptation

Here, the accounts largely coincide. What repeats is not jumping overnight from three meals to ten days of water: first, adapt metabolism to ketone bodies with a low-carb, high-healthy-fat, and protein-rich diet; then incorporate 24-, 48-, and 72-hour fasts; and, from there, rely on mineral salts.

Personal records range from 4 to 12 days, with one case claiming to have surpassed 15. One of the most cited patterns is intermittent fasting with a 6-to-8-hour window, sustained for a year, and that of someone eating one meal a day for three years. The common warning: breaking a fast is more delicate than starting one, and should be done with easily digestible foods.

Risks: From Fatty Liver to Appendicitis

The harshest criticism comes from the metabolic field: it is argued that fasting raises acetones and their toxic metabolites, leading to liver damage, fatty liver, and fibrosis. This claim clashes with other voices in the same trinc-up, who note that fatty liver does not come from fasting, and with evidence from those who have eaten one meal a day for years without medication.

The most uncomfortable episode occurred months later, when the protagonist announced appendicitis and surgery, with a month of rest and zero exercise. He himself dismissed any link to fasting, which had ended long ago. The same trinc-up noted the hypothesis that the lack of fiber from the ketogenic diet might have altered the microbiota and forced the appendix. This is speculation without proof: the participant himself recalled that several family members have had appendicitis surgery without ever trinc a ketogenic diet.

The Second Attempt: 72 Hours Without Dizziness

With the ketogenic diet established, the same protagonist tried again. On day three, he felt "quite fresh," without dizziness, nausea, or fatigue, attributing this to two changes: he had left physical work, and his body was already adapted to drawing from fat. A third attempt reached 72 hours, taking advantage of a cervical injury leave and staying mostly at home.

The prediction, with reservations: long fasting will continue to appeal to those seeking a quick detox, but this record suggests that the difference between a tolerable experience and four days of suffering lies not in willpower, but in months of prior metabolic adaptation. Those who haven't done it will likely quit before reaching ketosis.