Best picks to start fasting
Our top tool and books, picked for beginners.
- Top pick · Free to startTry Zero
Zero fasting app
Time and log your fasts on your phone.
Best beginner bookBuy now at Bookshop.orgThe Complete Guide to Fasting
Jason Fung with Jimmy Moore
Best for womenBuy now at Bookshop.orgFast Like a Girl
Dr. Mindy Pelz
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Fast smarter. Feel more in control.
Practical fasting guides, simple tools, and a free beginner guide for adults who want to understand fasting. Educational, not a clinic, and not a verdict on what you should do.
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Recommended reads & tools
Books and apps we think are worth a look if you want to go deeper. Read at your own pace, and talk to a doctor before changing how you eat.
The Complete Guide to Fasting
by Jason Fung with Jimmy Moore
A practical handbook on different ways to fast, from shorter daily windows to longer fasts, with common questions answered along the way.
The Obesity Code
by Jason Fung
Explains one doctor’s view of how hormones like insulin relate to appetite and body weight, and where meal timing fits in.
Fast Like a Girl
by Dr. Mindy Pelz
A fasting guide written for women, covering how the author suggests timing fasts around the menstrual cycle, with recipes for breaking a fast.
Fast This Way
by Dave Asprey
A biohacker’s take on intermittent fasting that also looks at sleep, exercise and food choices around an eating window.
The Longevity Diet
by Valter Longo
A researcher’s overview of his work on nutrition and ageing, including everyday eating patterns and his periodic fasting-mimicking approach.
Zero fasting app
App for tracking your fasts
A popular app for timing and logging your fasting windows on your phone.
Nutrinixy calorie tracker
App for logging meals
Log meals by photo, voice or barcode in seconds. Handy for planning what you eat in your eating window.
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