Body stages Also worth knowing Card 3 of 5
Explainer card
Sleep and mood
Sleep disturbance is the most common mild complaint early in a multi-day fast. Later, people in supervised fasting studies often report better sleep quality and mood; controlled evidence is limited.
Background reading, never a stage. The timer never shows it, and it is not tied to any hour of a fast. In the app it sits under the stages, in Also worth knowing.
Sources
- Michalsen 2003Effects of short-term modified fasting on sleep patterns and daytime vigilance in non-obese subjects: results of a pilot study. Ann Nutr Metab, 2003.
- Wilhelmi de Toledo 2019Safety, health improvement and well-being during a 4 to 21-day fasting period in an observational study including 1422 subjects. PLoS One, 2019.
What studies measured, not a reading of your own body. Stop and seek help if you feel unwell; the signs to stop for are listed under Stop signs on the safety page.
Evidence edition 1.0 · last updated · How this is written