The 18:6 fasting plan is similar to the 16:8 intermittent fasting, what makes the difference is that you have fewer hours to eat, you have to consume all your food in 6 hours of the day.
Just like the 16:8 method, you can choose either to skip breakfast, or to skip dinner, or set your own eating schedule based on your personal preference.
You could eat lunch at 12:30 p.m., a snack at 3 p.m., then finish dinner by 6:30 p.m. Or you could eat breakfast at 7:30 a.m., a snack at 10 a.m. finish lunch by 1:30. You may have to try out different schedules to see what works best for your lifestyle.
18:6 is known as one of the more difficult intermittent fasting methods. If your weight loss has stalled doing 14:10 or 16:8, or if you tend to overeat with a longer eating window, or if you want to kick your weight loss up a notch, this plan with an 18-hour fast might be suitable for you.