Stomach issues and menopause

Key takeaways

• Falling oestrogen and progesterone levels directly affect gut motility, the gut microbiome, and the gut-brain axis, making digestive symptoms a recognised and well-documented part of menopause.
• Bloating, constipation, acid reflux, and IBS-like symptoms can all be driven or worsened by the hormonal changes of perimenopause and menopause. Effective support exists, from dietary changes and targeted supplements to clinical options including HRT and specialist nutrition support;the right approach depends on your specific symptoms and history.

Research presented at The Menopause Society 2025 Annual Meeting found that 94% of women experience gastrointestinal symptoms during menopause, with 82% reporting that those symptoms began or worsened at the menopause transition. Yet only 33% had ever received a formal diagnosis or explanation for what was happening.

If you have been dealing with bloating, unpredictable bowels, acid reflux, or stomach cramps and assumed it was unrelated to your hormones, you are in the overwhelming majority. These symptoms are common, they have a clear physiological basis, and they are rarely explained in the ten minutes most women get with their GP.

This article covers why menopause affects digestion, which symptoms to expect, the mechanisms behind them, and what actually helps, both in terms of day-to-day changes and clinical support.

Why does menopause affect your digestion?

The short answer is that oestrogen and progesterone do far more in the digestive system than most people realise, and when both decline during perimenopause and menopause, the effects are felt throughout the gut.

A 2025 review by Ley and Saha, published in Nature Reviews Gastroenterology and Hepatology, found that menopausal women are 2.9 times more likely to experience abnormal gastrointestinal symptoms than premenopausal women. That is not a marginal difference. It reflects the extent to which sex hormones regulate gut function across the entire digestive tract.

Here is what is happening at a physiological level.

Gut motility.

Oestrogen and progesterone both influence how quickly food moves through the digestive system. As levels decline, gut motility becomes less regulated, which can mean food moves too slowly (causing constipation and bloating) or too quickly (causing diarrhoea and urgency). A 2025 UK scoping review by Shaw, Abbott and Pettinger, published in Women's Health, confirmed that altered gut motility is one of the primary mechanisms linking hormonal decline to gastrointestinal symptoms in perimenopause and postmenopause.

Intestinal permeability.

The lining of the gut acts as a selective barrier, allowing nutrients through while keeping bacteria and waste products out. Oestrogen plays a role in maintaining the integrity of this barrier. As oestrogen falls, the gut lining can become more permeable, a change sometimes described as increased intestinal permeability. This acts as a distinct mechanism contributing to GI symptoms in menopause, separate from motility changes.

Gut microbiome composition.

Your gut microbiome is the vast community of bacteria, fungi, and other microorganisms that live in your digestive tract. It plays a central role in digestion, immune function, inflammation, and even mood. And it is profoundly affected by oestrogen.

A 2025 review by Liaquat et al., published in Post Reproductive Health, found that the menopause transition is associated with a measurable reduction in gut microbial diversity, including decreases in beneficial bacteria such as Lactobacillus and Bifidobacterium. This reduction in diversity is linked to increased bloating, bowel irregularity, intestinal inflammation, and a heightened susceptibility to food intolerances.

The brain-gut axis.

The gut and brain are in constant two-way communication via the vagus nerve and a network of neurotransmitters. Oestrogen plays a modulatory role in this system. As levels fall and menopause-related anxiety and sleep disruption increase, the gut-brain axis becomes dysregulated in ways that amplify digestive symptoms.

The most common stomach issues during menopause

Digestive symptoms during menopause vary considerably between women, but research and clinical data point to a consistent cluster. The Menopause Society 2025 Annual Meeting data gives the clearest picture of how common each one is.

Bloating (77% of women).

The most widely reported digestive symptom. Bloating during menopause is driven by slowed gut motility, increased gas production, changes to the gut microbiome, and in some women, the development of new food sensitivities (discussed below). It tends to worsen over the course of the day and is often worse in the week before a period during perimenopause, when progesterone levels are particularly variable.

Constipation (54%).

Reduced gut motility means food spends longer in the large intestine, where more water is absorbed and stools become harder and more difficult to pass. This is particularly common in the early years after menopause when oestrogen levels have dropped sharply.

Stomach pain and cramps (50%).

Abdominal cramping and discomfort can result from altered gut motility, increased gut sensitivity, and, in women with IBS, a worsening of pre-existing functional symptoms. The pain is typically cramping or spasming in nature, rather than sharp or localised.

Acid reflux and heartburn (49%).

Oestrogen supports the tone of the lower oesophageal sphincter, the muscular valve that prevents stomach acid from travelling back up into the oesophagus. As oestrogen declines, sphincter tone can reduce, allowing acid reflux to occur more readily. Women who never experienced heartburn before menopause can find it appears during perimenopause.

Diarrhoea and bowel urgency.

For some women, the change in gut motility tips in the opposite direction. Rather than slowing, the bowel becomes more reactive, producing looser stools, urgency, or episodes of diarrhoea, particularly in response to stress or specific foods. This pattern overlaps significantly with IBS.

Nausea.

Less commonly discussed but reported by a meaningful proportion of women, particularly during perimenopause when hormone levels are fluctuating most erratically.

The brain-gut connection: why stress makes it worse

The gut is sometimes described as the second brain, and the description is apt. The enteric nervous system lining the digestive tract contains more than 500 million nerve cells, and it communicates constantly with the brain via the vagus nerve. This two-way communication is known as the gut-brain axis, and it is highly sensitive to stress, anxiety, and hormonal fluctuation.

Shaw et al. (2025) identified the gut-brain axis as a key mechanism through which hormonal changes in menopause affect GI function. After menopause, declining oestrogen and progesterone reduce the protective effect on GI function, increasing vulnerability to functional gut disorders.

Stress may also play a role. Raised cortisol has been associated with changes in gut motility and digestion, and during menopause, when disrupted sleep and anxiety are common, these effects can overlap with those of falling oestrogen.

This is clinically relevant because it means treating menopause symptoms holistically improves gut outcomes indirectly. In Voy's outcome data, 83% of members reported improved mood and emotional symptoms after starting treatment (presented at The Menopause Society 2025; forthcoming in Climacteric), and 71% reported improved sleep. Both of these improvements reduce the cortisol load on the gut, even before any direct gut treatment has been introduced.

Cognitive Behavioural Therapy (CBT) has a strong evidence base for managing IBS and functional gut disorders by directly addressing the gut-brain communication pathway. It is available as part of Voy's menopause service for exactly this reason: not as a substitute for medical treatment, but as a clinical tool that addresses a real physiological mechanism.

Can menopause trigger IBS or worsen existing symptoms?

Irritable Bowel Syndrome (IBS) is a functional gut disorder characterised by abdominal pain, bloating, and altered bowel habits, without any structural abnormality in the gut. It is already more prevalent in women than men, and there is strong evidence that menopause makes it significantly worse.

Lenhart et al., writing in Neurogastroenterology and Motility in 2020, found that postmenopausal women with IBS report significantly more severe symptoms than premenopausal women with IBS. This is not simply because IBS worsens with age. The study pointed to the loss of oestrogen's protective effects on gut sensitivity and motility as the driver of that difference.

What this means in practice is that if you have been managing IBS reasonably well and find it has suddenly deteriorated, or if you are experiencing IBS-like symptoms for the first time during perimenopause, hormonal decline is a likely contributing factor. It does not mean you have developed a new condition or that something is structurally wrong. It means your gut is responding to the same hormonal changes driving your other menopause symptoms.

This is important because it opens the door to hormonal and lifestyle interventions that can improve gut symptoms as part of broader menopause management, rather than treating IBS as an entirely separate, unrelated problem.

New food sensitivities during perimenopause

One of the more unexpected experiences of perimenopause is finding that foods you have eaten without difficulty for decades suddenly cause bloating, discomfort, or digestive upset. This is not coincidence or imagination. It is a direct consequence of the gut microbiome changes described above.

Reduced microbial diversity impairs the gut's ability to break down and ferment certain carbohydrates. FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols) are a category of short-chain carbohydrates found in foods including onions, garlic, wheat, dairy, and certain fruits. When gut bacteria are less able to process these effectively, they ferment in the large intestine, producing gas, bloating, and discomfort. Lactose intolerance can develop or worsen during perimenopause as reduced gut bacteria populations mean less lactase enzyme activity. Gluten sensitivity is also reported more frequently by women in this age group, again linked to microbiome shifts and increased gut permeability.

The practical response to new food sensitivities is not a drastic elimination diet. Self-directed elimination diets carry the risk of nutritional gaps, particularly in protein, calcium, and B vitamins, nutrients that are already under pressure during menopause.

“If you are noticing new food reactions, the most useful step is a conversation with a nutrition specialist who understands the menopause context. Voy's women's health nutritionist works alongside the specialist clinical team to provide exactly this kind of personalised guidance, rather than generic advice applied without knowledge of your full picture.”

Katy Jackson, Clinical Director - Women's Health

What actually helps: diet, lifestyle and clinical support

Diet and fibre.

A diet that supports gut motility and microbiome diversity is the foundation. This means adequate fibre (ideally 25-30g daily for adults) from a variety of sources including vegetables, legumes, wholegrains, and fruit. Variety matters as much as quantity: different plant foods feed different bacterial populations, supporting microbial diversity.

Staying well hydrated is equally important. Fibre absorbs water to form soft, bulky stools; without adequate fluid intake, increased fibre can actually worsen constipation. Aim for 1.5-2 litres of water daily as a baseline.

For women with significant bloating or new food sensitivities, a structured approach to identifying trigger foods, with professional guidance, is more effective than broad self-imposed restriction.

Probiotics.

Liaquat et al. (2025) found emerging evidence that Lactobacillus and Bifidobacterium strains may help restore microbial diversity and reduce GI symptoms in menopausal women. Probiotic supplements containing these strains, alongside prebiotic fibre to feed them, represent a reasonable addition to a gut-support strategy. The evidence base is still developing, so frame this as a supportive measure rather than a primary treatment.

Fermented foods (live yoghurt, kefir, sauerkraut, kimchi) provide natural probiotic benefit, alongside nutrients and are a practical way to support microbiome diversity through diet.

Magnesium glycinate.

Magnesium plays a direct role in gut motility. It draws water into the intestine and supports the muscular contractions that move food through the bowel, making it particularly relevant for constipation during menopause. Magnesium glycinate, the form in Voy's clinically personalised supplement range, is better absorbed and gentler on the gut than other magnesium forms. It also supports sleep quality and reduces muscle tension, both of which have indirect benefits for the gut-brain axis. As with all supplements, this is a clinician-recommended addition to a treatment plan, not a standalone fix.

Exercise.

Physical movement directly stimulates gut motility. Even moderate daily activity, a 20-30 minute walk, improves the regularity and ease of bowel movements. Exercise also reduces cortisol levels, which benefits the gut-brain axis independently of its effects on motility.

Sleep.

Poor sleep raises cortisol, dysregulates the gut-brain axis, and worsens every GI symptom associated with menopause. Addressing sleep disruption is therefore not a peripheral element of gut health management; it is central to it. In Voy's outcome data, 71% of members reported improved sleep after starting treatment (presented at The Menopause Society 2025; forthcoming in Climacteric), with downstream benefits across mood, energy, and digestive function.

HRT.

By stabilising and restoring oestrogen levels, HRT addresses the hormonal driver of altered gut motility, increased gut permeability, and gut microbiome disruption. For many women, gut symptoms improve as part of a broader improvement in hormonal balance after starting HRT, even when the gut was not the primary reason for starting treatment.

88% of Voy members felt more hormonally balanced at three months compared to 62% receiving standard care (presented at The Menopause Society 2025; forthcoming in Climacteric). Improved hormonal balance reduces the hormonal contribution to gut dysregulation, even if it does not eliminate all GI symptoms directly.

CBT and stress management.

For women whose gut symptoms are significantly driven by the gut-brain axis, CBT offers a clinical route to improvement that works on the communication pathway between brain and gut directly. CBT has a strong evidence base for IBS specifically, and is available as part of Voy's menopause service for women whose symptoms have a significant stress or anxiety component.

When stomach symptoms need a doctor's attention

Most digestive symptoms during menopause are driven by the hormonal changes described in this article. But some symptoms need clinical assessment sooner rather than later, and it is worth knowing which ones.

Seek prompt medical attention if you experience:

• Blood in your stool, or black, tarry stools
• Unexplained and unintentional weight loss
• Persistent bloating that is new, worsening, or present most days for three weeks or more (persistent bloating in women over 50 is a recognised early symptom of both ovarian cancer and bowel cancer and should always be assessed by a doctor)
• A persistent change in bowel habit lasting more than three weeks, particularly looser stools or going more frequently
• Abdominal pain that wakes you from sleep, or that is severe, localised, or does not ease
• Difficulty swallowing, or a sensation of food sticking in the throat or chest
• Vomiting that is new, persistent, or contains blood

These symptoms do not mean something serious is necessarily wrong. But they are the body's way of signalling that something needs to be looked at..

If you are over 50 in England, you will also receive an NHS bowel cancer screening invitation. Responding to it is one of the most straightforward things you can do for your long-term gut health.

Getting proper support for stomach issues during menopause

Digestive symptoms are not a minor inconvenience at the edges of menopause. For many women, they are among the most disruptive and confusing parts of the experience, made worse by the fact that so few healthcare encounters connect them to their hormonal cause.

You deserve a consultation where there is time to explore the full picture: your gut symptoms, your hormonal history, your sleep, your stress, your diet, and how they all interact. That is what a 45-minute consultation with a BMS-trained (British Menopause Society) menopause specialist provides, and it is what Voy offers as standard.

From that consultation, your specialist can build a personalised plan that may include HRT, targeted supplements, access to Voy's women's health nutritionist, CBT, or a combination, depending on what is driving your specific symptoms.

93% of Voy members reported an improvement in their overall quality of life after starting treatment (presented at The Menopause Society 2025; forthcoming in Climacteric).
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