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One Meal A Day

OMAD, 23:1 Intermittent Fasting

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Meta Information

ID:omad
Name:One Meal A Day
Schema Version:1.5

Alternate Names

  • OMAD
  • 23:1 Intermittent Fasting

Intervention Type

dietary_practice

Expected Cost Mean

Low Cost:
0
High Cost:
0
Cost Type:
unquantifiable
Description:
No direct cost; depends on food choices, potentially reduces grocery bill.

Summary

OMAD is a form of intermittent fasting that restricts daily caloric intake to a single meal, typically within a one-hour window. This extended fasting period aims to promote metabolic flexibility, enhance cellular repair processes like autophagy, and improve insulin sensitivity. It can be an effective strategy for weight management and may contribute to longevity pathways by optimizing metabolic health.

Purpose

Restricts eating window to enhance metabolic health, autophagy, and longevity.

Drug Class

Drugs In Class

Empty Array

Impact

Score:
6.8
Justification:
Significant metabolic optimization, promotes autophagy, insulin sensitivity, and weight management.

Evidence

Grade:
B
Score:
6
Justification:
Growing human evidence for intermittent fasting benefits, less specific for OMAD.

Safety

Score:
2.5
Justification:
Generally safe for healthy individuals; potential for nutrient deficiency or disordered eating.

Flags

  • Not suitable for pregnant/breastfeeding individuals, those with eating disorders, or certain medical conditions.
  • Risk of nutrient deficiencies if food choices are not carefully planned and diverse.
  • May cause initial fatigue, headaches, or irritability during adaptation phase.
  • Potential for orthorexia or other disordered eating patterns in susceptible individuals.
  • Consult a physician, especially if on medications for diabetes or blood pressure.

Verdict

Effective for metabolic health, requires careful nutrient planning.

Model

Gemini 3 Flash

Delivery

Route:
none
Scope:
  • systemic

Indication

Focus:
healthspan
Description:
OMAD is a form of intermittent fasting that restricts daily caloric intake to a single meal, typically within a one-hour window. This extended fasting period aims to promote metabolic flexibility, enh...

Typical Protocol

  • Consume all daily caloric intake within a single, typically 1-2 hour, eating window, followed by a 22-23 hour fast.