How to Start 16:8 Intermittent Fasting: A Beginner's Guide

Last updated: June 28, 2026 · by Clustle Studio

16:8 means fasting for 16 hours and eating within an 8-hour window each day. It is the most beginner-friendly fasting schedule because your overnight sleep covers much of the fast. The simplest way to start: pick an 8-hour eating window, drink water freely, and ease in over a week or two rather than jumping straight to 16 hours.

How 16:8 works

You choose an 8-hour window in which you eat all your meals. Outside that window, you only have water, black coffee, or plain tea. Most people skip breakfast and eat from around midday to evening, but the window is yours to set.

Step by step

1. Ease in — don't start at 16 hours

Begin with a 12-hour overnight fast (e.g. 8pm to 8am). After a few days, push to 14:10, then to 16:8. This lets hunger signals adjust instead of fighting them on day one.

2. Pick a window you can keep

Consistency matters more than the exact hours. Choose a window that fits your work and social life so you can repeat it most days.

3. Drink during the fast

Water, black coffee, and plain tea are your tools. They have no meaningful calories, help with hunger, and keep you hydrated. Skip anything with sugar, milk, or cream during the fast.

4. Eat normally — not less of everything

16:8 only helps if your eating window contains balanced, satisfying meals. Don't try to also slash calories hard at the same time; that is how people burn out.

Common beginner mistakes

• Going too hard, too fast — jumping straight to 16 hours (or longer) on day one.
• Overeating in the window — undoing the fast with oversized or junk-heavy meals.
• Under-hydrating — much early "hunger" is actually thirst.
• Expecting instant results — give it a few consistent weeks.

Frequently asked questions