The Rise of Gut Health Supplements
Bathroom talk has increased on social media lately, and it has a mission. Gut health is a prominent and public conversation among women, largely spearheaded by brands promoting probiotic and other gut-supporting supplements and foods.
The digestive health supplements market is expected to reach $26.61 billion by 2028. According to Research and Markets, this value can be attributed to “growing awareness of digestive health, increased incidence of digestive disorders, aging population and digestive health concerns, consumer interest in probiotics and prebiotics, [and a] rise in functional food and beverage consumption (Research and Markets, 2024).”
Digestive health is a real concern for women. Irritable bowel syndrome (IBS), for example, is twice as prevalent in women than in men (Kim et al., 2018). Females with IBS also report more accompanying symptoms like constipation, fatigue, depression, and lower quality of life than their male counterparts. In general, women are found to have more gastrointestinal (GI) symptoms and with more frequency than men, including bloating, heartburn, diarrhea, and abdominal pain (Almario et al., 2018).
This higher prevalence can be due to women’s hormonal fluctuations or increased rates of stress, anxiety, and depression. Research is also revealing how the composition of the female gut may differ from the male gut. The gut microbiome is a community of bacteria, viruses, fungi, and other microbes that carry out digestive functions and other bodily processes. A healthy, balanced, and diverse population of these microbes is critical to a well-functioning GI system and overall physical and mental health. Probiotic and prebiotic supplement products claim to achieve this balance and therefore result in a cascade of benefits from more regular bowel movements, less bloating, improved hair and skin health, decreased brain fog, and overall physical and mental health improvements.
Supplement and food companies reach this audience of women on social media with campaigns destigmatizing bodily functions, partnerships with female influencers who create aspirational content, and fostered trust with transparency in ingredients and sourcing (Ramlan, 2025).
Customers are buying and sharing their results. The company Seed’s DS-01®
Daily Synbiotic supplement, a pre- and probiotic capsule, has over 5,000 5-star reviews. Customers share that their bowel movements are more regular and they have decreased stomach ailments like pain, cramps, and bloating. Similarly, the brand Ritual’s Synbiotic+ supplement, which includes “3-in-1 clinically-studied prebiotics, probiotics and postbiotics to support a balanced gut microbiome,” also has customers reporting improved bowel movements and decreased stomach issues. Several comments on both brands’ websites claim that the supplements improved the customers’ gut health after a period of unexplained issues and an inability of doctors or traditional medicine to find a solution.
The success of these companies is not only attributable to their timely and targeted marketing, but true need. Women who do experience increased rates of stomach ailments are seeking solutions outside of the traditional medical system and turning to these brands to feel better.
However, research is still in progress regarding exactly if and how these types of supplements work. A 2020 systematic review examining whether probiotic supplements alleviate IBS symptoms did find that products containing the bacterial species Lactobacillus and Bifidobacterium improved symptoms (Asha et al., 2020). And a clinical trial report published in 2024 found that personalized pre- and probiotic supplementation, depending on the participants’ unique microbiome profiles, decreased the severity of their IBS symptoms (Matsuura et al., 2024). However, these are early findings, and exactly which species and interventions are effective and safe for whom and for what conditions requires more study.
The growth rate of the digestive supplement market could outpace the evidence available to support it. A 2022 study published in Frontiers in Medicine found that more than 60% of probiotic marketing messages online featured claims that lacked scientific evidence. Studies of online information about probiotic supplements have been found not to match current scientific understanding, particularly when it comes to brands’ claims of what their products can accomplish. Vague advertisements of “improved gut health” or “increased well-being” cannot be measured in a standardized way. More needs to be learned about ingredients, dosages, and specific use cases before a brand can claim a direct benefit.
Being aware of this gap between brand claims and the evidence is important, particularly for women, because the gut is critical to women’s overall health. While supplement brands focus primarily on GI function, the gut microbiome’s influences reach far beyond the intestines. It not only drives metabolic functions throughout the body, but is intricately connected to the brain via a system of nerves, neurotransmitters, and neural cells. While current research is investigating the microbiome’s connection to GI illnesses, it is also uncovering its influence on disease pathology throughout the body and in the brain. The gut microbiome is linked to hormonal issues, cancers, mood disorders, and even brain illnesses like Alzheimer’s Disease and Parkinson’s Disease (Holingue et al., 2020). Since women are at greater risk than men for mood disorders and brain illnesses, taking evidence-based care of the gut is vital throughout the lifespan.
The rapid commercial growth of gut-health supplements expected in the coming years brings with it some risk. With an increased awareness of gut health and the gut-brain axis and demand for solutions, there is much to be gained by brands financially at the expense of a vulnerable population seeking relief. Aside from unverified claims, vague benefits, and misinformation in marketing, the growth could outpace regulations and safety guideline development, putting consumers’ health at risk. And since there is no known one-size-fits-all pre- or probiotic regimen, products could be ineffective or inappropriate for an individual’s unique microbiome (Richman, 2018).
As the gut-health and gut-brain axis conversation expands in the media and advertiser voices grow louder, it is wise to approach the market with caution and to follow the evidence. Women’s health is too important not to.
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