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Diet Protocol

Early Time-Restricted Feeding

Time-restricted pattern with earlier feeding window aligned to circadian biology.[3011,3316,3353, etc.]

Superscript reference numbers link to the Sources bibliography.

Moderate Evidence
Metabolic HealthSleepEnergy

Composite Rating

3.9/5

Blends evidence depth, community direction, safety friction, and completeness.

Evidence Intensity

65/100

Moderate depth from human/RCT/meta counts

Community Direction

100

Positive Lean • confidence Moderate

Safety Friction

14/100

Early signal from adverse/interaction markers

Data Completeness

100%

Studies 9 • mentions 8 • links 18

Not medical advice. This product is for educational and informational purposes only. It does not diagnose, treat, cure, or prevent any disease and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions regarding a medical condition.

FDA disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Results may vary. Not intended for use by pregnant or nursing women, individuals under 18, or those with known medical conditions without physician consultation.

If you are experiencing a medical emergency, call 911 or your local emergency number immediately.

Implementation Blueprint

Best fit: Users with glucose-control or sleep-timing goals..[184,1297,3011, etc.]

Goal alignment: Metabolic Health, Sleep, Energy.[184,1297,3011, etc.]

Protocol Type

Diet Plan

Evidence Tier

MEDIUM

Best Fit

Users with glucose-control or sleep-timing goals.

Primary Focus

Metabolic Health, Sleep

Safety and Pitfalls

  • Social schedule friction can reduce adherence.[184,1297,3011, etc.]

At-A-Glance Evidence Architecture[3011,3316,3353, etc.]

Clinical Depth

Humans: 14 • RCTs: 3 • Meta: 1

Cohort / Real-World

Cohort signals: 0

Safety Markers

Adverse signals: 1 • Interactions: 0

Evidence Tracking

Freshness, trend, and study timeline for this item

Evidence Tracking

Status

Updated

Trend

→ Stable evidence base

Depth

14 total studies

Timeline

20182023

Top Signal Metrics[3011,3316,3353, etc.]

Total indexed

14

Human studies

14

Randomized trials

3

Adherence/dropout signals

2

Meta-analyses

1

Safety adverse signals

1

Community Direction Mix[184,1297,6132]

Weighted direction score: 100 (Positive Lean)

Benefit

Evidence Quality Summary[3011,3316,3353, etc.]

Medium when human studies exist but with smaller scale, shorter duration, or weaker replication depth.

Total indexed

14

Human studies

14

Randomized trials

3

Adherence/dropout signals

2

Meta-analyses

1

Safety adverse signals

1

Cohort signals

0

Mechanistic signals

0

Study Type Breakdown

Distribution of evidence by study design strength

Meta-AnalysesLevel 1a1
Randomized TrialsLevel 1b3
Human Studies (other)Level 3-410
All IndexedAll levels14
65

Evidence Strength: Moderate

Composite of study volume, RCTs, and meta-analyses

Top Human Studies[3011,3316,3353, etc.]

PMID 33139084 • 2021 Apr

Effect of early time-restricted feeding on the metabolic profile of adults with excess weight: A systematic review with meta-analysis.

Clin Nutr

Open PubMed

PMID 31151228 • 2019 May 30

Early Time-Restricted Feeding Improves 24-Hour Glucose Levels and Affects Markers of the Circadian Clock, Aging, and Autophagy in Humans.

Nutrients

Open PubMed

PMID 34371933 • 2021 Jul 15

Eating Dinner Early Improves 24-h Blood Glucose Levels and Boosts Lipid Metabolism after Breakfast the Next Day: A Randomized Cross-Over Trial.

Community Report Frequency[184,1297,6132]

Benefit reports: 4

Adverse reports: 0

No-effect reports: 0

Mixed reports: 0

Unclear reports: 4

Signal confidence: 0.42

Top Reported Effects[184,1297,6132]

Benefits

  • weight loss: 4
  • improved: 1
  • better: 1

Adverse

  • Social schedule friction can reduce adherence: 1

No Effect

  • insufficient no-effect reports captured: 0

Community confidence 0.42 with mentions: benefit 4, adverse 0, no-effect 0.

Subreddit coverage: ScientificNutrition.

Community Evidence Examples[184,1297,6132]

post • r/ScientificNutrition • unclear

Disentangling the Distinct Effects of Calorie Restriction versus Time-Restricted Eating on Longevity Pathways: Calorie Deficit or Fasting Window?

Open mention

post • r/ScientificNutrition • unclear

Association of time-restricted eating versus a whole-food plant-based diet with metabolic syndrome biomarkers: Results from NHANES 2013–2018

Open mention

post • r/ScientificNutrition • benefit

Effect of a ketogenic diet, time-restricted eating, or alternate-day fasting on weight loss in adults with obesity: a randomized clinical trial **ABSTRACT** **Background:** Studies evaluating the effects of novel, alternative dietary appro…

Primary Source Links

Evidence Sources

  • https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(%22early%20time-restricted%20feeding%22%20AND%20humans%5BMeSH%20Terms%5D)
  • https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(%22early%20time-restricted%20feeding%22%20AND%20humans%5BMeSH%20Terms%5D)%20AND%20humans%5BMeSH%20Terms%5D
  • https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(%22early%20time-restricted%20feeding%22%20AND%20humans%5BMeSH%20Terms%5D)%20AND%20humans%5BMeSH%20Terms%5D%20AND%20randomized%20controlled%20trial%5BPublication%20Type%5D
  • https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(%22early%20time-restricted%20feeding%22%20AND%20humans%5BMeSH%20Terms%5D)%20AND%20humans%5BMeSH%20Terms%5D%20AND%20meta-analysis%5BPublication%20Type%5D

Scientific Evidence Notes[3011,3316,3353, etc.]

1. PubMed triage evidence summary: Early Time-Restricted Feeding

PUBMED • Human diet protocol literature

Counts from structured PubMed protocol-specific query set.

Outcome: Humans 14, RCT 3, meta 1, cohort 0.[3011,3316,3353, etc.]

Open source
2. Effect of early time-restricted feeding on the metabolic profile of adults with excess weight: A systematic review with meta-analysis.

PUBMED • 2021 • Human evidence curation set

PMID 33139084 from Clin Nutr.

Outcome: See linked PubMed abstract for methods and outcomes.[3011,, etc.]

4 (100%)
Adverse0 (0%)
No Effect0 (0%)
Mixed0 (0%)

Nutrients

Open PubMed

PMID 35716852 • 2022 Sep 1

The Fasting and Shifted Timing (FAST) of Eating Study: A pilot feasibility randomized crossover intervention assessing the acceptability of three different fasting diet approaches.

Appetite

Open PubMed

PMID 29754952 • 2018 Jun 5

Early Time-Restricted Feeding Improves Insulin Sensitivity, Blood Pressure, and Oxidative Stress Even without Weight Loss in Men with Prediabetes.

Cell Metab

Open PubMed

PMID 37880791 • 2023 Oct 25

The effects of intermittent fasting diet alone or in combination with probiotic supplementation in comparison with calorie-restricted diet on metabolic and hormonal profile in patients with polycystic ovary syndrome: study protocol for a randomized clinical trial.

Trials

Open PubMed

PMID 35300752 • 2022 Mar 9

The Effect of Early Time-Restricted Feeding on Glycemic Profile in Adults: A Systematic Review of Interventional Studies.

Rev Diabet Stud

Open PubMed

PMID 32729615 • 2020 Oct 1

Two weeks of early time-restricted feeding (eTRF) improves skeletal muscle insulin and anabolic sensitivity in healthy men.

Am J Clin Nutr

Open PubMed

PMID 31339000 • 2019 Aug

Early Time-Restricted Feeding Reduces Appetite and Increases Fat Oxidation But Does Not Affect Energy Expenditure in Humans.

Obesity (Silver Spring)

Open PubMed
Open mention

post • r/ScientificNutrition • unclear

Effects of Time-Restricted eating on Body composition and Metabolic parameters in Overweight and Obese Women

Open mention

post • r/ScientificNutrition • unclear

Effects of Time-Restricted Eating on Glycemic control in Type 2 Diabetes

Open mention

post • r/ScientificNutrition • benefit

Effect of a ketogenic diet, time-restricted eating, or alternate-day fasting on weight loss in adults with obesity: a randomized clinical trial Abstract Background: Studies evaluating the effects of novel, alternative dietary approaches fo…

Open mention

comment • r/ScientificNutrition • benefit

**Abstract** Emerging evidence from animal studies suggests fasting is required for the geroprotective effects of calorie restriction (CR), but its relevance in humans remains unclear. In this perspective, we discuss the unique impact of i…

Open mention

comment • r/ScientificNutrition • benefit

I think time-restricted eating deserves praise as multiple trials show it helps with weight management, but the claim that there is important weight-independent benefit seems exaggerated. Majority of the human studies show larger weight lo…

Open mention
https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=(%22early%20time-restricted%20feeding%22%20AND%20humans%5BMeSH%20Terms%5D)%20AND%20humans%5BMeSH%20Terms%5D%20AND%20(cohort%5BTitle%2FAbstract%5D%20OR%20prospective%5BTitle%2FAbstract%5D%20OR%20longitudinal%5BTitle%2FAbstract%5D)
  • https://pubmed.ncbi.nlm.nih.gov/33139084/
  • https://pubmed.ncbi.nlm.nih.gov/31151228/
  • https://pubmed.ncbi.nlm.nih.gov/34371933/
  • https://pubmed.ncbi.nlm.nih.gov/35716852/
  • https://pubmed.ncbi.nlm.nih.gov/29754952/
  • https://pubmed.ncbi.nlm.nih.gov/37880791/
  • https://pubmed.ncbi.nlm.nih.gov/35300752/
  • https://pubmed.ncbi.nlm.nih.gov/32729615/
  • https://pubmed.ncbi.nlm.nih.gov/31339000/
  • https://pubmed.ncbi.nlm.nih.gov/?term=Early%20Time-Restricted%20Feeding
  • Community Sources

    • https://old.reddit.com/search.json?raw_json=1&sort=relevance&t=year&limit=8&q=%22time%20restricted%20eating%22%20(diet%20OR%20nutrition%20OR%20meals%20OR%20side%20effects%20OR%20experience%20OR%20results)%20(subreddit%3Anutrition%20OR%20subreddit%3AScientificNutrition%20OR%20subreddit%3Aloseit%20OR%20subreddit%3AMealPrepSunday%20OR%20subreddit%3Aketo%20OR%20subreddit%3Afasting%20OR%20subreddit%3Amediterraneandiet%20OR%20subreddit%3Avegan%20OR%20subreddit%3Avegetarian%20OR%20subreddit%3Acarnivorediet%20OR%20subreddit%3Abiohackers%20OR%20subreddit%3Alongevity)
    • https://old.reddit.com/r/ScientificNutrition/comments/1pkxiqj/disentangling_the_distinct_effects_of_calorie/.json?raw_json=1&sort=top&limit=25
    • https://www.reddit.com/search/?q=Early%20Time-Restricted%20Feeding
    3316,
    3353
    Open source
    3. Early Time-Restricted Feeding Improves 24-Hour Glucose Levels and Affects Markers of the Circadian Clock, Aging, and Autophagy in Humans.

    PUBMED • 2019 • Human evidence curation set

    PMID 31151228 from Nutrients.

    Outcome: See linked PubMed abstract for methods and outcomes.[3011,3316,3353, etc.]

    Open source
    4. Eating Dinner Early Improves 24-h Blood Glucose Levels and Boosts Lipid Metabolism after Breakfast the Next Day: A Randomized Cross-Over Trial.

    PUBMED • 2021 • Human evidence curation set

    PMID 34371933 from Nutrients.

    Outcome: See linked PubMed abstract for methods and outcomes.[3011,3316,3353, etc.]

    Open source
    5. The Fasting and Shifted Timing (FAST) of Eating Study: A pilot feasibility randomized crossover intervention assessing the acceptability of three different fasting diet approaches.

    PUBMED • 2022 • Human evidence curation set

    PMID 35716852 from Appetite.

    Outcome: See linked PubMed abstract for methods and outcomes.[3011,3316,3353, etc.]

    Open source
    6. Early Time-Restricted Feeding Improves Insulin Sensitivity, Blood Pressure, and Oxidative Stress Even without Weight Loss in Men with Prediabetes.

    PUBMED • 2018 • Human evidence curation set

    PMID 29754952 from Cell Metab.

    Outcome: See linked PubMed abstract for methods and outcomes.[3011,3316,3353, etc.]

    Open source
    7. The effects of intermittent fasting diet alone or in combination with probiotic supplementation in comparison with calorie-restricted diet on metabolic and hormonal profile in patients with polycystic ovary syndrome: study protocol for a randomized clinical trial.

    PUBMED • 2023 • Human evidence curation set

    PMID 37880791 from Trials.

    Outcome: See linked PubMed abstract for methods and outcomes.[3011,3316,3353, etc.]

    Open source
    8. The Effect of Early Time-Restricted Feeding on Glycemic Profile in Adults: A Systematic Review of Interventional Studies.

    PUBMED • 2022 • Human evidence curation set

    PMID 35300752 from Rev Diabet Stud.

    Outcome: See linked PubMed abstract for methods and outcomes.[3011,3316,3353, etc.]

    Open source
    9. Two weeks of early time-restricted feeding (eTRF) improves skeletal muscle insulin and anabolic sensitivity in healthy men.

    PUBMED • 2020 • Human evidence curation set

    PMID 32729615 from Am J Clin Nutr.

    Outcome: See linked PubMed abstract for methods and outcomes.[3011,3316,3353, etc.]

    Open source
    10. Early Time-Restricted Feeding Reduces Appetite and Increases Fat Oxidation But Does Not Affect Energy Expenditure in Humans.

    PUBMED • 2019 • Human evidence curation set

    PMID 31339000 from Obesity (Silver Spring).

    Outcome: See linked PubMed abstract for methods and outcomes.[3011,3316,3353, etc.]

    Open source