16:8 Intermittent Fasting

16:8 intermittent fasting means fasting for 16 hours and eating within an 8-hour window each day. It is one of the most popular fasting protocols because it fits naturally around sleep and requires no calorie counting during eating hours.

How 16:8 Works

During the 16-hour fasting window, insulin levels fall and your body begins shifting toward fat metabolism. Many people skip breakfast and eat between noon and 8 p.m., though any consistent 8-hour window works. The key is consistency: your body adapts to a predictable rhythm, making hunger easier to manage over time.

Who Is 16:8 Best For?

16:8 is ideal for beginners exploring fasting, busy professionals who want structure without extreme restriction, and anyone transitioning from three-meal eating patterns. It pairs well with ketogenesis and mild autophagy activation on longer daily fasts, especially when combined with nutrient-dense meals during the eating window.

Tips for Success

• •Start with 14:10 if 16 hours feels too long, then extend gradually.
• •Stay hydrated with water, black coffee, or unsweetened tea during the fast.
• •Track your fasting hours to build consistency and spot patterns.
• •Prioritize protein, fiber, and whole foods during your eating window.