Fasting FAQ
These are short answers to questions beginners ask. They are educational. They are not personal advice, and they do not say that a schedule is medically right for you. For the longer version of any answer, follow the link to the guide.
What is intermittent fasting?
It is an eating pattern with a time you eat and a time you do not. The Mayo Clinic describes it as a pattern of eating based on time limits. It is not medical care, and this site does not claim it treats disease. Full page: what is intermittent fasting.
What do 16:8 and 18:6 mean?
In the naming used here, 16:8 is about 16 hours fasting and 8 hours eating. 18:6 is about 18 hours fasting and 6 hours eating. They are examples. Start with the pages 16:8 fasting and, later if you still want it, 18:6 fasting. A comparison is in fasting schedules.
Is there a best schedule?
No schedule on this site is the best one, and none is prescribed. 12:12 and 14:10 are gentler examples. 16:8 is the one articles mention most. Longer windows are not a higher level. The quiz only points you to a page to read.
What can I drink?
Water, plain black coffee, and plain tea are the common choices. Anything with calories, or with a sweetener, may end the fast for many people. That is a convention, not a medical rule. Details: what to drink while fasting.
What if I feel hungry?
Hunger often comes in a wave near a usual mealtime. If you feel well, you can wait until the window you planned, or you can eat. If you feel faint, confused, or unwell, stop and get help if you need it. Guide: hunger while fasting.
How do I end a fast?
Eat an ordinary meal, sitting down, at a normal pace. You do not need a special product. Guide: how to break a fast.
Will I lose weight?
This site does not promise weight loss or any other body change. What you eat, sleep, stress, medication, and health conditions all sit outside a simple clock. Do not use these pages to chase a number on a scale.
Can I exercise?
Many people keep usual, moderate exercise. Hard new workouts plus a new long fast are a lot at once. Stop if you feel unwell. Guide: fasting and exercise.
What are the common mistakes?
Starting too long, ignoring safety, blurring the window with drinks, obsessing over a scale, and stacking many new rules. Guide: common fasting mistakes.
Do I have to fast every day?
No. Some people use a daily window. Some do not. A day with a shared meal, poor sleep, or illness can simply be a day you eat on a normal rhythm. There is no streak you owe this website.
Is fasting safe?
Not for everyone, and this site cannot tell you that it is safe for you. Read the safety note and talk with a healthcare professional if it applies. Feeling unwell is a reason to stop, not a reason to finish the timer.
Where should I start?
Start here is the short path. The printable piece is the beginner guide. Tools are listed on the tools page.
Safety
Safety. People who are pregnant, breastfeeding, under 18, have an eating disorder or a history of one, have diabetes or hypoglycemia, take medication, or have a heart, kidney, or other medical condition should talk with a healthcare professional before fasting. Stop a fast and get help if you feel faint, confused, or unwell.