When Everything Slows Down
Nothing changed about what you eat. You drink plenty of water. And yet things are slower, less predictable, and less complete than they used to be. This is one of the most common midlife changes and one of the least discussed.
It is worth taking seriously, and not only for comfort. Transit time influences bloating, hormone clearance and how you feel generally, which is why it is usually the first thing to address rather than the last.
Why it changes now
Progesterone and estrogen both affect motility. Most women already know this from their own cycle, where the days before a period feel different from the days after. In perimenopause those fluctuations become larger and less predictable, and transit follows them.
Estrogen affects the gut lining and the microbiome, both of which influence how efficiently the colon does its work.
The pelvic floor is involved more often than people realize. Coordination of the pelvic floor during defecation can become less effective, particularly after childbirth and with age. This produces difficulty and incompleteness rather than infrequency, and it does not respond to fiber, because fiber is not the problem. It responds to physiotherapy, which is why identifying it matters.
Thyroid function. An underactive thyroid slows transit, becomes more common with age, and is straightforward to test. It should be excluded rather than assumed absent.
Medications. Iron supplements, certain antidepressants, some blood pressure medications and opioid painkillers all slow things down. Worth checking what you are taking before concluding that your gut has changed.
Why it matters beyond comfort
Used estrogen is packaged by the liver and sent out through the intestine. The longer it waits there, the more opportunity there is for it to be unwrapped by bacterial enzymes and reabsorbed rather than leaving.
So transit is part of hormone clearance, not a separate issue from it. The full mechanism is explained here.
Slow transit also means longer fermentation, which means more gas, which is why constipation and bloating so often travel together and why treating the bloating alone rarely works.
Get these looked at properly, and soon
- A change in bowel habit that has lasted more than three weeks, particularly if you are over fifty
- Blood in the stool, or black stools
- Unexplained weight loss
- Iron deficiency anemia with no obvious cause
- Persistent abdominal pain, or pain that wakes you at night
- Needing to open your bowels at night
- A family history of bowel cancer or inflammatory bowel disease
- Constipation that has come on suddenly with no clear reason
Bowel cancer rates in adults under fifty have been rising, and a change in bowel habit put down to diet, stress or hormones is the most common route to a late diagnosis. This is not a reason for alarm, it is a reason to have it excluded.
What actually shifts it
- Fiber, built up gradually, with both kinds. Soluble fiber holds water and softens. Insoluble adds bulk and stimulates movement. Most people need more of both and increase too quickly, which produces gas and the conclusion that fiber does not agree with them.
- Water alongside the fiber, not instead of it. Increasing fiber without fluid makes things harder, which is where the impression that fiber makes it worse often comes from.
- Movement, daily. One of the most reliable influences on transit and among the least discussed. Walking after meals is enough to matter.
- A consistent time, unhurried. The colon is most active in the morning and after eating. Working with that rhythm rather than against it is more effective than it sounds.
- Position. Knees above hips, feet on a low stool. It changes the angle of the rectum and reduces straining. Unglamorous, free, and it works.
- Kiwi fruit, prunes, or magnesium. All three have reasonable evidence. Kiwi fruit in particular has held up well in trials and causes less gas than many alternatives.
- Review your medications and supplements with whoever prescribed them. Iron is the most common offender and there are gentler forms.
- Ask about the pelvic floor if the problem is difficulty rather than frequency. If you are going regularly but it is hard work and feels incomplete, this is the question to ask, and physiotherapy is the answer more often than diet is.
A note on laxatives
Osmotic laxatives are safe for regular use and are the standard first line for good reason. The caution attached to long term stimulant laxative use is specifically about stimulants, and the two get confused constantly.
Avoiding effective treatment out of a general worry about dependence is a common and unnecessary form of suffering. This is worth a proper conversation rather than a decision made from the internet.
Back to gut health in midlife, or see the R.E.N.E.W. Foundation, which addresses transit before anything else for the reasons on this page.
