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Alternate-Day Fasting (ADF)

ADF, Every-Other-Day Fasting

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Meta Information

ID:alternate-day-fasting
Name:Alternate-Day Fasting (ADF)
Schema Version:1.5

Alternate Names

  • ADF
  • Every-Other-Day Fasting

Intervention Type

dietary_practice

Expected Cost Mean

Low Cost:
0
High Cost:
0
Cost Type:
unquantifiable
Description:
No direct cost; potential for minor food budget adjustments.

Summary

Alternate-Day Fasting (ADF) involves cycles of fasting and non-fasting periods, promoting metabolic flexibility by shifting the body's primary fuel source from glucose to ketones. This pattern can induce cellular repair processes like autophagy, improve insulin sensitivity, and support healthy weight management. These metabolic adaptations are relevant to healthspan by reducing chronic disease risk and potentially slowing age-related decline.

Purpose

Structured eating pattern to enhance metabolic health and cellular repair.

Card Summary

ADF alternates fasting days with eating days, promoting metabolic flexibility, autophagy, and potentially aiding healthspan by improving metabolic markers.

Drug Class

Drugs In Class

Empty Array

Impact

Score:
6.5
Justification:
Improves metabolic flexibility, weight management, and cellular repair pathways.

Evidence

Grade:
A
Score:
8.5
Justification:
Supported by multiple human RCTs and meta-analyses on metabolic health.

Safety

Score:
3
Justification:
Generally safe; potential for fatigue, nutrient gaps, or disordered eating.

Flags

  • Not suitable for individuals with a history of disordered eating or certain medical conditions.
  • May cause initial fatigue, headaches, or irritability as the body adapts.
  • Risk of nutrient deficiencies if food choices on eating days are not balanced.
  • Requires careful monitoring for individuals on medications, especially for diabetes or blood pressure.
  • Long-term effects on bone density and muscle mass require further investigation.

Verdict

Effective for metabolic health, requires careful implementation.

Model

Gemini 3 Flash

Delivery

Route:
none
Scope:
  • systemic

Indication

Focus:
healthspan
Description:
Alternate-Day Fasting (ADF) involves cycles of fasting and non-fasting periods, promoting metabolic flexibility by shifting the body's primary fuel source from glucose to ketones. This pattern can ind...

Typical Protocol

  • Consume zero or very low calories (typically <500 kcal) on fasting days, alternating with ad libitum eating on non-fasting days.