24-hour fast
A full calendar day with no food, logged as one entry per day rather than a start and end time.
Food & fasting
Research records
Historical source snapshot. Not freshly verified, not a recommendation. Study findings, community accounts and app defaults are not interchangeable.
Publication suitability · 2026-10-15: Historical reference only; not a clinical verification. Clinical, regulatory, efficacy, safety and dose claims are not independently established by this review.
24-hour fast
A full calendar day with no food, logged as one entry per day rather than a start and end time.
Evidence category: Clinical study. This describes the source category, not approval or certainty.
Regulatory statement in source: Not separately recorded; do not infer approval from the evidence category.
A three-week randomised controlled trial in lean, healthy adults compared true 24-hour alternate-day fasting against a matched degree of continuous daily energy restriction, and against alternate-day fasting with no net energy deficit. True 24-hour fasting reduced body mass but lost less fat than the matched continuous restriction, and postprandial cardiometabolic markers and adipose tissue gene expression did not differ between groups.
Benefits reported in the imported source
- A 24-hour fast repeated on alternate days lowered body mass in a 3-week randomised trial
Risks and limits
- The same trial found this lost less fat than a matched degree of continuous daily restriction
- Fasting without a net energy deficit did not significantly reduce body or fat mass
Source bottom line: A single day of complete fasting cuts intake for that day; the trial evidence shows this loses less fat than the same calorie deficit spread evenly across days.
Uncertainty: Reference information only. Not medical advice.
Study protocols — reports, not instructions
36 lean, healthy adults split into three groups of 12
- Reported regimen
- 24-hour fasting on alternate days, at either 150% or 200% energy intake on feeding days, compared with 75% energy intake every day with no fasting
- Duration
- 3 weeks
- Reported outcome
- Daily restriction cut fat mass by 1.75 kg; alternate-day fasting with the same net deficit cut it by only 0.74 kg, and fasting without a net deficit did not significantly reduce fat mass.
- Source
- A randomized controlled trial to isolate the effects of fasting and energy restriction on weight loss and metabolic health in lean adults (Templeman et al. 2021, Science Translational Medicine)
Claim provenance
evidence.json#/catalog:food-protocol:full-day-fast/protocols/0
Community and practice descriptions
Accounts of a practice are not evidence of safety or effectiveness. Words such as “standard”, “safe” or “recommended” describe the source account, not verified consensus or this wiki’s advice. Commercial and self-published citations are retained for traceability, not vendor endorsement or independent clinical corroboration.
Unverified imported account — Pros and Cons of Intermittent Fasting - Healthline
An imported authored paraphrase, not a quotation or a recommended protocol.
Review: unverified historical account. The imported wording is preserved for attribution; its full clinical, dosing, efficacy or consensus claims have not been independently established. Described practice context only; no clinical benefit or safety outcome is inferred.
Imported wording: A nutrition guide describes Eat Stop Eat as a 24-hour fast once or twice per week, outside a study setting.
Historical research outcome: verified-description · 2026-10-06
Rechecked the previously published description against live source content. The live guide explicitly describes Eat Stop Eat as a 24-hour fast once or twice per week, outside an intervention-trial description.
- https://www.healthline.com/nutrition/6-ways-to-do-intermittent-fasting: verified-description — The live guide explicitly describes Eat Stop Eat as a 24-hour fast once or twice per week, outside an intervention-trial description.
Pharmacokinetic context
No half-life recorded in this source snapshot. No value has been inferred.
Source references
- A randomized controlled trial to isolate the effects of fasting and energy restriction on weight loss and metabolic health in lean adults (Templeman et al. 2021, Science Translational Medicine)
- PubMed: 24-hour fasting RCT (Templeman et al. 2021)
Snapshot provenance
Source ID: catalog:food-protocol:full-day-fast. Commit: adc7684614f9439b41d91a3312b62e7982c7e20e. Review state: historical-not-reverified. Authored links are retained separately from the canonical evidence links in the public data. App templates/defaults and rejected drafts are archived, not deployed.
Related entries and components
None listed.