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A fictional fit couple in a dark kitchen, vegetables on the counter, and a digital clock reading 18:6.

Late Lunch
Early Dinner
Get Thinner

Get Started
18-hour fast
Late lunch
Early dinner
18 days a month
18 in a row is the challenge

The method

How the 18 works.

  • An 18-hour fast, without food.
  • 18 days a month. They do not have to be consecutive.
  • 18 days in a row is the challenge, not the rule.
  • Late lunch and early dinner.
  • The old window: 1:00–7:00 PM.
A fictional adult woman in workout clothes measuring her waist.