What Happens to Your Metabolism During a Fast?
Metabolism during fasting explained: learn how insulin, glycogen, fat oxidation and ketones change during a fast—and why timing varies between people.
Fasting
Evidence-based guides to intermittent fasting, fasting schedules, longer fasts, breaking a fast, exercise, hydration, and safety.
Fasting Safety: Who Should Avoid Intermittent Fasting?
Fasting safety guide: who should avoid intermittent fasting, medication and diabetes risks, pregnancy, eating disorders, warning signs and medical guidance.
How to Break a Fast: A Practical Guide
A gentle first meal, comfortable portions and attention to symptoms can help you break a fast. This guide explains practical choices and when to seek medical advice.
Electrolytes During Fasting: What You Need to Know
Learn when water is enough, how exercise and heat change fluid needs, and why electrolyte supplements require caution for some people.
Fasting and Cancer: What Does the Research Show?
Explore what research can and cannot say about fasting and cancer, including the limits of early studies and the importance of oncology guidance.
What Breaks a Fast? Calories, Coffee, Creamers and Supplements
What breaks a fast depends on your goal. Compare water, coffee, creamers, supplements and calories without treating a timer as a medical measurement.
Fasting Schedules Compared: 12:12, 14:10, 16:8, 5:2 and Alternate-Day Fasting
Compare common fasting schedules, including 12:12, 14:10 and 16:8, with practical tradeoffs and safety considerations before choosing a routine.
Intermittent Fasting: An Evidence-Based Beginner’s Guide
An evidence-based introduction to intermittent fasting: what it means, how schedules differ, what the research suggests, and who should speak with a clinician first.