Gut symptoms in menopause: bloating and cramps

Your hormones do something to your gut. Just not what most pages on the subject claim. Irritable bowel syndrome is more common in women than men (odds ratio 1.67). Over the age of 50 it becomes less common, not more (odds ratio 0.75, PMID 22426087).

That second figure does not fit the story that menopause wrecks your gut.

What does hold up is subtler. Your symptoms change pattern, and you no longer know when they will come. That is not the same as being ill.

What do your hormones do to your gut?

They help set how fast your bowel moves and how sensitive it is. Oestrogen and progesterone receptors sit all through your stomach and gut, on muscle, nerves and lining. Through that route your hormones affect transit, how sensitive your gut wall is to stretch, and how well it seals (PMID 24627581).

Progesterone slows your bowel. You have probably noticed that for years.

In the second half of your cycle, when progesterone is high, your stools tend towards slow. Around your period it tips the other way. In perimenopause both hormones swing erratically instead of declining neatly, and that erratic quality is probably what you notice.

Take two women of 49. One has had the same bloated week each month for twenty years and knows exactly when. The other had that too, and since this year can no longer predict it. It has not got worse, it has become unpredictable.

How solid all this is remains a fair question. One review pooled 122 studies spanning more than forty years. The conclusion: quality is disappointing, and it was often not even recorded which phase of the transition participants were in (PMID 41143477).

Does your gut flora change in menopause?

Probably far less than you read everywhere. This is where the gap between the ranking pages and the research is widest. Several sites state that your gut flora becomes impoverished and that you therefore need probiotics. When that question was finally pooled, nothing came out.

The figures are strikingly flat.

A 2026 review pooled seven studies covering roughly 1,700 women. There was no significant difference in gut flora diversity (p = 0.990), nor in the two largest bacterial groups or their ratio (PMID 42006274). The authors conclude that current evidence does not support consistent differences.

So where does the story come from? From an idea called the estrobolome: gut bacteria make an enzyme that renders oestrogens reabsorbable. That mechanism is real. The source almost everyone traces back to is only a discussion article with no measurements of its own (PMID 28778332).

A plausible idea is not evidence. I think that matters to say on a site that also sells something.

When are gut symptoms not a menopause symptom?

When they are new and they persist. Between 45 and 60 more changes than your hormones. Some of it shows up in blood. Not one page in Google's top ten names a single one, although they belong precisely to this age.

I find that the weakest point of this whole topic.

The coeliac row deserves separate attention, because those symptoms resemble menopause symptoms so closely. What gets looked at is in coeliac disease symptoms in women, and a coeliac panel looks at that side.

Why anaemia counts separately here

Because iron deficiency with anaemia means something different from iron deficiency without it. In a study of 584 people who were investigated internally, cancer of the stomach or bowel was found in 8.76% of those with anaemia. Among those with only a low iron it was 1.20% (PMID 37198146).

That difference is close to sevenfold, and it is why doctors look further at that combination.

In a woman who still has periods there is usually a clear reason for iron loss. After your last period that falls away. The same result then means something else, and that is exactly what goes wrong when everything lands on the menopause pile.

What a low ferritin without anaemia does and does not mean is in iron deficiency without anaemia. An iron status panel looks at that side of the story.

What do you take to your GP?

Since when it has been going on, and whether the pattern changed or only became unpredictable. What your stools are doing and whether that differs from your normal. Whether there is blood in them or they are black. And whether you have lost weight without meaning to.

Those last two are the most important on the list.

Bring as well whether abdominal symptoms wake you at night, whether you can feel a lump in your abdomen, and whether bowel cancer runs in your family. According to RIVM, around twelve thousand people in the Netherlands are diagnosed with bowel cancer each year, and the great majority are over 55.

One thing I want to name separately. If you take part in the national bowel cancer screening programme, that does not replace discussing new symptoms. A clear result eighteen months ago says nothing about something that started last month. Symptoms belong with your GP, not with the next envelope.

Other complaints from this phase that rarely get linked to hormones are in bladder infections in menopause and itchy skin in menopause. For the wider picture, navigating perimenopause is the starting point.

Incidentally, Dutch public GP guidance lists heavier periods, vaginal dryness and hot flushes for menopause. Gut symptoms are not on it. That does not mean you are imagining it, it means the link is less settled than fourteen websites tell you.

References

1. Mulak A, Tache Y, Larauche M. Sex hormones in the modulation of irritable bowel syndrome. World J Gastroenterol. 2014;20(10):2433-2448. PMID 24627581.
2. Lovell RM, Ford AC. Global prevalence of and risk factors for irritable bowel syndrome: a meta-analysis. Clin Gastroenterol Hepatol. 2012;10(7):712-721. PMID 22426087.
3. Saravinovska K, Santi D, Costantino F, et al. The impact of estrogen status on the gut microbiome: a systematic review and meta-analysis. Front Endocrinol (Lausanne). 2026;17:1780806. PMID 42006274.
4. Baker JM, Al-Nakkash L, Herbst-Kralovetz MM. Estrogen-gut microbiome axis: physiological and clinical implications. Maturitas. 2017;103:45-53. PMID 28778332.
5. Singh P, Arora A, Strand TA, et al. Global prevalence of celiac disease: systematic review and meta-analysis. Clin Gastroenterol Hepatol. 2018;16(6):823-836. PMID 29551598.
6. Hodges S, Attree C, Picardo S, et al. Prevalence of gastrointestinal malignancy in non-anemic iron deficiency and significance for endoscopic screening: a Western Australian multicenter cohort study. J Gastroenterol Hepatol. 2023;38(9):1530-1534. PMID 37198146.
7. Shaw N, Abbott R, Pettinger C. The volume and characteristics of research on gastrointestinal symptoms in natural peri- and postmenopause: a scoping review. Womens Health (Lond). 2025;21:17455057251387470. PMID 41143477.
8. RIVM. Bowel cancer: figures and context. Available via rivm.nl.
9. Thuisarts. I am going through menopause. Available via thuisarts.nl.

Every blood test result at Lunara includes a professional assessment by a BIG-registered doctor. For treatment decisions, discuss your results with your GP.