5:2 Diet Complete Guide: Rules, Benefits, and Sample Meal Plans
✨ Key Takeaways
- Learn the best practices of intermittent fasting for optimal health.
- Understand how to track your fasting windows effectively.
- Discover the science-backed benefits of fasting protocols.
In This Article
The 5:2 diet (also known as the Fast Diet) is an intermittent fasting protocol where you eat normally for 5 days of the week and restrict calories to 500–600 calories on 2 non-consecutive days. Popularized by Dr. Michael Mosley, the 5:2 method offers the metabolic and longevity benefits of fasting without requiring daily time-restricted eating, making it ideal for people who prefer a flexible weekly schedule.
⚡ 5:2 Diet Quick Summary
- 5 Normal Days: Eat at your baseline maintenance level (check your TDEE target).
- 2 Fasting Days: 500 calories for women, 600 calories for men, spaced with at least 1 normal eating day in between (e.g., Monday and Thursday).
- Primary Benefits: Significant reduction in visceral fat, lower fasting insulin, and improved cardiovascular markers.
How the 5:2 Diet Works in Practice
On your 5 normal days, you do not need to follow strict food restrictions, though eating wholesome, nutrient-dense foods delivers the best results. On your 2 fasting days, you have two options for structuring your 500–600 calories:
- Two Small Meals: A light 200-calorie breakfast (eggs and greens) and a 300–400 calorie dinner (grilled chicken salad).
- One Substantial Meal: Saving all 500–600 calories for a single satisfying evening dinner (similar to OMAD).
Sample 500-Calorie Fasting Day Menu
Track Your 5:2 Fasting Days
Customize your weekly fasting calendar, track hydration, and hit your target goals with FastingTracker for iOS.
Download Fasting Tracker Free →Medical References
- Barnosky AR et al. (2014). Intermittent fasting vs daily calorie restriction for type 2 diabetes prevention. Transl Res.
- Harvie MN et al. (2011). The effects of intermittent or continuous energy restriction on weight loss. Int J Obes.
Track your fasting window, monitor your weight, and reach your goals faster with our free app.