12:12 intermittent fasting
A 12-hour fast with a 12-hour eating window — the most approachable form of time-restricted eating.
12h
Jejum
12h
Janela de alimentação
Horário de exemplo
Eating window opens at 8:00 AM
Start your first meal of the day.
Eating window closes at 8:00 PM
Finish your last meal for the day.
Fast until 8:00 AM the next day
12-hour fasting window begins.
Para quem é adequado
- People completely new to structured fasting
- Those whose lifestyle or health situation calls for a minimal fasting window
- People who want to establish a consistent overnight eating cutoff as a first habit
Pros and cons
Prós
- Aligns closely with a natural overnight fast, making it easy to adopt
- Least likely to cause hunger or discomfort among time-restricted eating protocols
- A reliable foundation for people who may later extend to 14:10 or 16:8
Contras
- The fasting window largely overlaps with sleep, so the lifestyle change is minimal
- Many people already fast 10–12 hours overnight without intentional effort
- May produce less pronounced metabolic adaptation than longer fasting protocols
Perguntas frequentes
- Is 12:12 really considered intermittent fasting?
- 12:12 is classified as the mildest form of time-restricted eating. Many researchers include it in intermittent fasting research, though it overlaps substantially with what people do naturally overnight. It is a valid starting point, especially for those new to structured eating patterns.
- What does 12:12 fasting involve in practice?
- 12:12 means eating only within a 12-hour window each day — for example, from 8 AM to 8 PM — and not eating outside those hours. For many people this means stopping eating after dinner and not eating until breakfast the following morning.
- Is 12:12 useful as a long-term protocol?
- 12:12 can be a sustainable long-term eating pattern for people who find longer fasting windows unsuitable. It establishes a consistent eating rhythm and discourages late-night eating, which some research suggests may have modest metabolic benefits.