Intermittent Fasting Knowledge Center
Science-backed answers from the book and community.
Editorial articles
9 articles
- nutrition
Why Hot Water Between Meals Is an Underrated Health Tool
Dr. Salisbury's secret from 1911: hot water between meals supports digestion, gut motility, and fasting. Here's what the historical and modern evidence shows.
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- nutrition
How to Rebuild Your Digestive System After Extended Fasting
Upton Sinclair's 1911 step-by-step guide to rebuilding digestion after a long fast, with modern science explaining why his gradual method still works today.
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- nutrition
Protein After Fasting: How Much Do You Need and What Sources Work Best
How much protein should you eat after a fast? Upton Sinclair's 1911 insights on post-fast protein, updated with modern nutritional science on timing and sources.
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- nutrition
What to Eat the Week After Your First 16:8 Fast
The week after your first 16:8 fast sets the foundation for lasting results. Upton Sinclair's 1911 post-fast guidance maps surprisingly well to modern nutritional science.
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- nutrition
The Milk Diet After Fasting: What Is It and Does It Work?
In 1911, Upton Sinclair documented the milk diet as the ideal recovery food after extended fasting. Here's what it involved and what modern science says about it.
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- nutrition
Why Starch and Sugar Are the Worst Foods to Return To After Fasting
Returning to starch and sugar after a fast triggers gut fermentation, insulin spikes, and rapid weight regain. Here's what Sinclair's 1911 research and modern science both show.
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- nutrition
The Best Diet After a Fast: What Research and Historical Cases Agree On
What you eat after breaking a fast matters as much as the fast itself. Discover what 1911 historical cases and modern research agree is the best post-fast diet.
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- nutrition
Fruits and Nuts as a Post-Fast Diet: Pros, Cons and When It Works
Upton Sinclair's 1911 guide recommended fruits and nuts after fasting. Here's what actually works — and when this approach falls short.
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- nutrition
Raw Food After Fasting: Does It Work Long-Term?
Upton Sinclair tried raw fruits and nuts after every fast in 1911. He found it worked beautifully — until intellectual work demanded something more.
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