Science-backed answers from the research and the community.
Editorial articles
Why Animals Fast When Sick: The Natural Healing Instinct
Why do sick animals stop eating? Upton Sinclair observed it in 1911 and modern science confirms it — sickness anorexia is a built-in healing mechanism we've largely forgotten.
Read answer →
Fasting During Illness: Should You Eat or Fast When Sick?
When illness strikes, should you eat or fast? Upton Sinclair's 1911 research and modern science both point to the same surprising answer for most common ailments.
Read answer →
Fasting and Respiratory Illness: Historical Evidence from the 1910s
Upton Sinclair's 1911 book documented fasting as a response to respiratory illness including grippe and catarrh.
Read answer →
Fasting and Appendicitis: What Sinclair's Cases Reveal
Upton Sinclair documented three appendicitis cases helped by fasting in 1911. Here's what those historical records show and what modern medicine says today.
Read answer →
Fasting and Chronic Fatigue: Why Rest (Including Digestive Rest) Matters
Upton Sinclair's 1911 cases show digestive rest can help chronic fatigue. Here's what historical evidence and modern science both reveal about fasting and energy recovery.
Read answer →
Can Fasting Help With Dropsy and Fluid Retention?
Upton Sinclair's 1911 book The Fasting Cure documented dramatic recoveries from dropsy. Here's what history and modern science say about fasting and fluid retention.
Read answer →
Fasting and Insomnia: Can Abstaining from Food Improve Sleep?
Upton Sinclair's 1911 book The Fasting Cure recorded consistent sleep improvements during extended fasts. Here's what history and modern science now both say about fasting and insomnia.
Read answer →
Fasting and Kidney Health: Bright's Disease and Modern Kidney Research
In 1911, Upton Sinclair reported fasting cases involving Bright's disease. Here's what historical records show and what modern kidney research now adds to that picture.
Read answer →
Fasting and Skin Conditions: Why Eczema and Catarrh Were Among the First Targets
In 1911 Upton Sinclair documented eczema and catarrh among the most common conditions helped by fasting. Here's what those historical cases show and what modern science adds.
Read answer →
Fasting and Asthma: Historical Evidence and Modern Insights
What did Upton Sinclair's 1911 cases show about fasting and asthma? Explore the historical evidence alongside modern science on inflammation and breathing.
Read answer →
Fasting and Digestive Disorders: The Case for Giving Your Gut a Rest
Upton Sinclair's 1911 book documented dozens of digestive recoveries through fasting. Here's what he observed — and what modern gut science now confirms.
Read answer →
Fasting and Nervous Exhaustion: Historical Cases of Recovery
Upton Sinclair's 1911 book documents multiple cases of nervous exhaustion and neurasthenia recovering through fasting. Here's what the historical evidence shows.
Read answer →
Can Fasting Help Chronic Headaches? What History and Science Both Say
Upton Sinclair's 1911 book documented chronic headaches clearing through fasting. Modern science now offers reasons why. Here's what both tell us.
Read answer →
Fasting and Rheumatism: What 277 Historical Cases Showed
Upton Sinclair's 1911 book documented multiple cases of rheumatism improving with fasting. Here's what those records show — and what modern science adds.
Read answer →