We know that we need adequate fibre, water and a regular routine to aid our digestive processes, yet many still lean quite heavily on laxatives in an attempt to speed up the process.
Your large intestine has three sections:
When you go to the bathroom, you usually empty the (descending) last section, which fills again 24-hours later and the process is repeated.
If you take a laxative, you often empty all three sections, so it may take up to 3 days to fill each section (ascending, transverse and descending) before your body is ready to eliminate again. This can perpetuate a viscous cycle of laxative abuse as you may start to panic after a couple of days and take more laxatives, assuming you're constipated.
It's important to also keep this '3-day rule' in mind when incorporating intermittent fasting into your regime.