Complete Protocol Directory

Intermittent Fasting Methods

Explore evidence-based fasting protocols categorized by duration, physiological intensity, and daily flexibility. Every method includes an interactive schedule generator.

16:8 Protocol16:8
The Balanced Standard

The most widely studied time-restricted feeding ratio. Balances sustained metabolic rest with flexible daily nourishment.

Fast 8:00 PM – 12:00 PM (noon next day); Eat 12:00 PM – 8:00 PM
Supports daytime digestive rest and a natural transition toward lipid utilization.
14:10 Gentle Reset14:10
Approachable Starting Point

An accessible entry into time-restricted feeding that gently curbs late-night snacking without restrictive daytime fasting.

Fast 8:00 PM – 10:00 AM next day; Eat 10:00 AM – 8:00 PM
Encourages nighttime digestive rest and helps curtail late-evening eating.
12:12 Circadian12:12
Natural Day-Night Harmony

Aligns your digestive window directly with solar daylight hours, allowing uninterrupted cellular restoration during sleep.

Fast 7:00 PM – 7:00 AM next day; Eat 7:00 AM – 7:00 PM
Aligns evening meal conclusion with natural circadian dark cycles.
18:6 Accelerated18:6
Deeper Metabolic Rest

Extends daily fasting to 18 hours, typically supporting two wholesome meals without snacking between.

Fast 7:00 PM – 1:00 PM next day; Eat 1:00 PM – 7:00 PM
Provides an extended window of baseline insulin and increased reliance on stored fuel.
20:4 Warrior20:4
Concentrated Feeding Window

A 20-hour fast paired with an intensive 4-hour evening nourishment window, inspired by historical warrior feeding patterns.

Fast 8:00 PM – 4:00 PM next day; Eat 4:00 PM – 8:00 PM
Concentrates daily nourishment into a condensed window with prolonged digestive pause.
OMAD (23:1)23:1
One Meal A Day

One concentrated, nutrient-dense feast consumed within an approximate 1-hour window each day.

Fast 7:00 PM – 6:00 PM next day; Eat 6:00 PM – 7:00 PM
An intensive single-window protocol requiring careful nutritional planning.
5:2 Weekly Protocol5:2
Intermittent Weekly Calorie Pattern

A weekly nutritional rhythm featuring 5 standard eating days and 2 non-consecutive reduced-intake days.

Regular: Tue, Wed, Fri, Sat, Sun. Reduced intake: Mon & Thu.
A weekly energy intake rhythm rather than a daily hourly restriction.