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Intermittent Fasting Blog & Guides

Evidence-based guides, plans, and answers — reviewed by registered dietitians.

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Intermittent Fasting Pros and Cons
Intermittent Fasting

Intermittent Fasting Pros and Cons

Intermittent fasting can be useful for some people because it creates a simple eating structure, but it also has real drawbacks. It can cause symptoms...

Intermittent Fasting Calculator: How to Choose Your Fasting Window
Intermittent Fasting

Intermittent Fasting Calculator: How to Choose Your Fasting Window

An intermittent fasting calculator should not tell everyone to fast longer. A better calculation starts with your current routine, your experience lev...

5:2 Intermittent Fasting Guide
Fasting Plans

5:2 Intermittent Fasting Guide

5:2 intermittent fasting is a weekly fasting pattern: you eat in your usual pattern on five days of the week and use two lower-intake fasting days. It...

Intermittent Fasting and Blood Sugar
Metabolic Health

Intermittent Fasting and Blood Sugar

Intermittent fasting is not something people with diabetes should start as a self-guided experiment. Fasting can change blood sugar risk because skipp...

18/6 Intermittent Fasting Guide
Fasting Plans

18/6 Intermittent Fasting Guide

18/6 intermittent fasting means fasting for 18 hours and eating within a 6-hour window. For example, you might fast from 7 p.m. to 1 p.m. the next day...

How Many Calories Break Intermittent Fasting?
Intermittent Fasting

How Many Calories Break Intermittent Fasting?

For a clean fast, any meaningful calories break the fasting window. There is no universal magic number of calories that keeps every fast “intact.” If...

Free Intermittent Fasting Plan: A Simple Starter Template
Fasting Plans

Free Intermittent Fasting Plan: A Simple Starter Template

A free intermittent fasting plan should help you choose a realistic fasting window, set simple drink rules, repeat the routine for a week, and adjust...

16/8 Intermittent Fasting 7-Day Meal Plan
Eating & Nutrition

16/8 Intermittent Fasting 7-Day Meal Plan

A 16/8 intermittent fasting meal plan uses a 16-hour fasting window and an 8-hour eating window. During the eating window, focus on balanced meals wit...

Healthy Fats: What They Are and Good Sources to Eat
Eating & Nutrition

Healthy Fats: What They Are and Good Sources to Eat

Fat is not something you have to avoid to eat well. The more useful question is not "how do I cut fat out?" but "which fats should most of my fat come...

Does Bulletproof Coffee Break a Fast?
Intermittent Fasting

Does Bulletproof Coffee Break a Fast?

Yes. Bulletproof coffee is coffee blended with butter and MCT oil, which adds roughly 200 to 450 calories per cup, so it ends a clean, calorie-free fa...