Most people see solid results starting with 16 hours of fasting per day. Beginners should ease in gradually — starting at 14 hours and building up — while more experienced fasters often extend to 18–20 hours or one meal a day. The exact number matters less than consistency and eating the right foods during your eating window. Not all fasting windows are created equal. The number of hours you spend fasting directly determines how deeply your body shifts from burning…
How many hours should you fast for intermittent fasting?
Not sure how long to fast? Discover the best fasting durations for every level—and how to find the right hours for your goals and lifestyle.
2026-05-19
🔒
Sign in to continue reading
Create a free account to read the full answer, comment, and submit your own fasting questions.
📗
Want the complete guide?
Intermittent Fasting in Practice
Everything in this article — and hundreds more pages of practical guidance, protocols, recipes, and mindset strategies — is covered in depth in the book, available now on Amazon.
Get the free Quick-Start Guide
Enter your email and we'll send you a free PDF with the top protocols, what breaks a fast, and a 7-day starter plan.
No spam. Unsubscribe anytime.
💬
Have personal experience with this? Your story helps thousands of people.