Science-backed answers from the research and the community.
Editorial articles
Why Digestive Rest Is as Important as Sleep for Recovery
Upton Sinclair believed digestive rest was essential to healing in 1911. Modern science on the migrating motor complex and gut repair explains why he may have been right.
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Fasting and Colon Health: Historical and Modern Evidence
Discover what Upton Sinclair's 1911 book The Fasting Cure claimed about fasting and colon health, and how modern science views digestive rest today.
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The Gut Microbiome and Fasting: What Modern Science Adds to Historical Observation
Upton Sinclair described gut rest and fermentation in 1911 — modern microbiome science now explains why fasting reshapes gut bacteria and reduces inflammation.
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The Connection Between Constipation and Chronic Illness
Upton Sinclair's 1911 book The Fasting Cure linked constipation to chronic disease. See what he observed and how modern gut science backs him up.
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How Fasting Restores Healthy Bowel Function
Upton Sinclair's 1911 case histories describe fasting relieving chronic bowel trouble. Here's what he observed, plus what modern gut science says about fasting and digestion.
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Why Fermentation in the Gut Causes Disease (and How Fasting Stops It)
Upton Sinclair's 1911 fermentation theory of disease explained, and how modern science on gut rest and fasting supports his century-old observations.
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How Fasting Heals the Gut: Rest, Repair, and Renewal
Discover how fasting gives the digestive system a rest that supports gut healing, drawing on Upton Sinclair's 1911 book The Fasting Cure and modern science.
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