Fasting Guides / Getting Started

What Is Intermittent Fasting?

A plain-English explanation of what intermittent fasting is, what it is not, and why millions of people use it.

The Simple Definition

In plain English:

Intermittent fasting means choosing specific hours of the day (or days of the week) when you eat, and not eating during the other times.

For example:

  • Eat between 12 PM and 8 PM
  • Fast between 8 PM and 12 PM the next day

You still eat every day — just in a smaller time window.

Common Examples of Intermittent Fasting

Here are the most popular and beginner-friendly methods:

12:12 Method

  • Fast for 12 hours, eat for 12 hours
  • Example: Eat from 7 AM to 7 PM
  • Great for beginners

16:8 Method (Most Popular)

  • Fast for 16 hours, eat for 8 hours
  • Example: Eat from 12 PM to 8 PM
  • Millions of people use this method daily

Skipping Breakfast

  • Simply delay your first meal
  • Example: First meal at noon, last meal at dinner

Many people already do a form of fasting without realizing it — especially overnight while sleeping.

What Intermittent Fasting Is NOT

There are many misconceptions. Intermittent fasting is not:

  • Not starving yourself

You still eat regular meals. You are just eating in a smaller time window.

  • Not a specific diet

It doesn’t tell you what foods to eat. It tells you when to eat.

  • Not extreme or unnatural

Humans have fasted throughout history. Our bodies are built to handle periods without food.

  • Not about suffering or punishment

Most people find it gets easier after the first 1–2 weeks.

Why Millions of People Use Intermittent Fasting

People use intermittent fasting for many reasons, including:

  • Weight management

Helps the body use stored energy

  • Improved energy

Many people report feeling more alert

  • Simplicity

Fewer meals to plan and prepare

  • Better eating habits

Reduces constant snacking

  • Convenience

Saves time and money

What Happens in Your Body During a Fast

When you eat, your body uses food for energy.

When you stop eating for several hours:

  • Your body uses the energy from your last meal
  • Then it begins using stored energy
  • Over time, your body becomes more efficient at using its own energy reserves

This is a normal and natural process.