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Water Fasting Guides
Original, science-based articles on electrolytes, intermittent vs water fasting, glycogen water weight, 72-hour physiology, refeeding, and safety. Pair these guides with our free calculator for personalized fat vs. water estimates.
Glycogen Water Weight: Why the Scale Drops Fast in 72 Hours
Most early "weight loss" on a fast is water released as glycogen stores empty—not body fat. Here is the physiology behind the first 72 hours.
14 min read · Read guide →
How to Safely Break a Water Fast: Refeeding Basics
Ending a fast safely matters as much as the fast itself. Learn phased refeeding, what to eat first, and when to seek medical help.
14 min read · Read guide →
What Happens to Your Body During a 72-Hour Water Fast
From falling insulin to rising ketones—here is a realistic timeline of physiological changes during the first 72 hours of water-only fasting.
14 min read · Read guide →
Who Should Avoid Extended Water Fasting
Extended water fasting is not for everyone. Learn contraindications, medication interactions, and when professional supervision is essential.
13 min read · Read guide →
Electrolytes During a Water Fast: What Matters
Headaches, cramps, and dizziness on a water fast are often electrolyte-related. Learn what changes, what people commonly do, and when to stop and get help.
14 min read · Read guide →
Water Fasting vs Intermittent Fasting Explained
16:8 is not a multi-day water fast. Compare goals, physiology, risks, and when a calculator estimate is useful—versus when IF is the safer default.
14 min read · Read guide →
These guides are for educational purposes only—not medical advice. Consult a healthcare provider before extended fasting.