20/09/2026
Are you doing intermittent fasting or thinking about starting?
Intermittent fasting is where you don't eat for a certain number of hours a day and usually involves missing breakfast.
I have written about how this may not be appropriate for all people and especially women may need a different and earlier window of eating - see article here https://www.balancingnutrition.com/?p=1624
Another group of people that may not find intermittent fasting suitable are those that are constipated! If you are not going to the toilet for days, then intermittent fasting may not be for you until you have more frequent daily bowel motions.
This is because our body is programmed to pass a bowel motion most often after waking and an urge can usually occur within 20 minutes of eating. But not just eating a piece of toast. Your breakfast needs to be at least 600kcal (so a more substantial breakfast) to get the body going.
That is why if you are constipated and don't pass a bowel motion for days, you may have missed the morning window of opportunity by not having breakfast.
My tip would be if you are quite constipated (and whilst there can be many reasons for this) and are intermittent fasting, then bring back breakfast and see if it helps your bowel motions. It's more important to go to the toilet daily, then to fast!
If you feel you have more issues going on, then book in a consult with me so we can look deeper at your specific picture and ways to get you feeling more comfortable!