The Muscle-Preserving Medical Fast
A medically designed fast that keeps protein high to protect muscle while driving rapid fat loss, effective but requiring supervision.
Fasting
Extended Fasting
24 hours through multi-day water fasts
8 protocols. None rests on strong human evidence. Ordered with the best evidenced first.
8 protocols in Extended Fasting
Eat-Stop-Eat · One Full Day
Dinner to dinner. One or two full-day fasts a week, the entry point to extended fasting.
Monk Fast · Day-Spanning Fast
Skip a full day of eating. Dinner to breakfast two days later, deep enough to matter.
Two-Day Water Fast
The midpoint of extended fasting. Deep ketosis, strong autophagy, manageable for many.
Three-Day Water Fast · Deep Autophagy Tier
At 72 hours, growth hormone surges 300%, autophagy peaks, and the immune system begins to reset.
The European Clinical Fasting Tradition
A century-old supervised European fasting method using small amounts of juice and broth, with the largest real-world safety record of any fast.
Prolonged Water-Only Fasting
Five to seven days, water only. Deep fasting territory that belongs under medical supervision.
Absolute Fast · No Food or Water
No food and no water. Heavily promoted, poorly evidenced, and genuinely risky beyond a day.