Intermittent Fasting 16:8 — A Beginner's Guide

The 16:8 method is the most popular form of intermittent fasting, and for good reason: it's simple. You eat during an 8-hour window each day and fast for the remaining 16 hours — most of which you spend asleep anyway.

How it works

A typical 16:8 schedule means finishing dinner by 8 PM and eating your first meal at noon the next day. During the fasting window you drink water, black coffee, or unsweetened tea. Rather than changing what you eat, 16:8 changes when — which for many people naturally reduces late-night snacking and total calorie intake.

Picking your eating window

The best window is the one that fits your life. Early risers often prefer 10 AM–6 PM; social eaters tend toward 12–8 PM so dinner with family stays on the table. If 16 hours feels hard at first, start with 12:12 or 14:10 and extend gradually — consistency beats intensity.

Common beginner mistakes

• Overeating in the window.Fasting doesn't cancel out calories; track your meals so the window doesn't become a free-for-all.
• Skimping on protein.With fewer meals it's easy to under-eat protein — aim to anchor each meal around a protein source.
• Forgetting hydration. Much of your usual fluid intake comes from food. Drink more water than feels necessary.
• All-or-nothing thinking. Breaking your fast early occasionally changes very little. What matters is the weekly pattern.

16:8 and Ramadan — how they differ

Ramadan fasting runs roughly dawn to sunset with no food or fluids, while 16:8 allows water and unsweetened drinks throughout. That makes hydration the key difference: in Ramadan, front-load fluids at suhoor and iftar. The nutrition logic is the same in both — your daily calorie needs do not change, so plan your two meals to cover them. Use our free calorie calculator to find that number, and note that MyNutriRise includes a dedicated Ramadan schedule among its 25 fasting protocols.

Who should be careful

Intermittent fasting isn't for everyone. If you are pregnant, breastfeeding, under 18, have a history of disordered eating, or manage a condition like diabetes, talk to your doctor before changing your meal timing.