Over the past decade, microbiome and other gut health ingredients have entered the mainstream supplement consumers’ daily routines.

According to the Global Prebiotic Association (Len Monheit, executive director, and Steve Imgrund, communications lead), companies have expanded the conversation and consumer awareness of how the gut impacts mental wellness, cardiometabolic health, inflammation, and more.

“Consumers increasingly recognize gut health and a healthy microbiome as foundational,” GPA said in a written interview. “Other axes such as gut-skin, gut-lung, and gut-kidney are also emerging … The challenge for the industry is maintaining scientific nuance while communicating broader benefits responsibly.”

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Probiotics have historically led the category. The International Probiotics Association (IPA) estimates that global probiotic sales reached $9.3 billion by the end of 2024, growing at a CAGR of 8.4%. The U.S. accounts $2.6 billion, or about 34% of the global marketplace.

Grand View Research estimated that, in 2024, probiotics accounted for 50% of the total gut health supplements market, valued at $18.36 billion, and projected the market would grow at a CAGR of 7.9% from 2025 to 2033.

Consumer familiarity grew significantly last year, said Samantha Ford, business director at AIDP. Citing a 2025 consumer survey from the Ingredient Transparency Center (ITC), “23% of U.S. consumers are taking more digestive health supplements versus 2024.”

Awareness across all solutions has increased significantly from 2024 to 2025, including for probiotics (94% to 97%), prebiotics (85% to 93%), postbiotics (61% to 73%), and synbiotics (50% to 56%). There was also a 30.7% increase in searches related to gut health on Google and TikTok, she said, citing Spate.

Stability and Versatility

Heat-stable strains and spore-forming probiotics are market leaders, reaching $3.4 billion in 2025, according to Future Market Insights.  Beyond not requiring refrigeration, these strains often withstand harsher manufacturing conditions.

Justin Green, PhD, scientific affairs lead for EpiCor at Cargill, said the category has been transformed by the mainstreaming of functional foods and beverages. “The rapid growth of ‘modern sodas’ with biotic benefits, supported by major advertising campaigns and strategic acquisitions, signals that gut health has moved far beyond the natural products aisle.”

Many factors contribute to a probiotic strain’s ability to affect a desired health benefit. Beyond survivability through shelf life, it’s important to know whether bacteria will also produce downstream molecules in real-world situations, said Jordi Riera, chief business officer at Kaneka Probiotics.

“Beyond sourcing and manufacturing credibility, formulation integrity is critical,” said Mark Walin, senior vice president of marketing and business development at BIO-CAT. “Ingredients must be compatible and stable within the finished product to ensure the label claims, particularly around potency and efficacy, are maintained throughout shelf life.”

Romane Maillet, marketing group manager at Lallemand Health Solutions, said product developers often overlook practical considerations. “Beyond science, consumers value ease of use, taste neutrality, and daily convenience.”

Sachets offer promise in the synbiotic category because they support these attributes. For example, a collaboration between Lallemand Health Solutions and FrieslandCampina Ingredients used sachets to pair B. lactis Lafti B94 with the prebiotic Biotis GOS in Natural Pro-Digest.

Broad Connections

The gut health category has expanded into a systems-level positioning, including for “immune resilience, mood/stress, metabolic health, skin, and healthy aging,” said Sanjay Tamoli, PhD, vice president of research and development at Logical Square, manufacturer of a Cassia fistula extract called CaFi for digestive support.

“Nearly 49% of consumers globally report familiarity with the terms ‘gut microbiome’ or ‘microbiota,’ compared to only 15% in 2022,” said Maillet, citing FMCG Gurus. “More than 60% of consumers recognize that digestive well-being affects multiple aspects of long-term health, including mental wellness and immunity.

“Consumers now hear ‘gut barrier,’ ‘microbiome,’ and ‘inflammation’ far more often than 5-7 years ago,” said Tamoli. Still, digestive comfort and regularity remain key entry points. “With CaFi, the broader narrative is daily gut rhythm, lower digestive friction, and a stronger foundation for whole-body wellness.”

“Brands are moving away from abstract microbiome language toward clear functional benefits,” said Phillipe Caillat, category manager at Lallemand Bio-Ingredients. For instance, Lallemand supported research on its postbiotic Gastro-AD with a focus on concrete digestive symptom relief, in a total of 900 subjects.

While communication of these benefits is robust on the supply side, there is still work to do on how these broader, systemic health benefits are communicated on labels, said Jacqueline Rizo, public relations lead at Stratum Nutrition. “Many products continue to lead with digestive claims, even when the underlying science supports much broader benefits.”

Differentiation in Digestion 

Consumers will “continue to turn to anti-diarrheals, laxatives, and antacids for relief from acute digestive symptoms,” said Walin, while biotics will fit with proactive, long-term care. The industry could do better to utilize the more immediate effects of digestive enzymes, which “can deliver fast, tangible results, but still require additional education to drive understanding and adoption.”

Rod Shelley, business development manager at Marinova, noted that credentials such as “natural, certified organic, sustainably sourced, and clinically validated” are becoming more important in this category.

Beyond more established outcomes, “innovation has accelerated around areas such as small intestinal bacterial overgrowth (SIBO),” said Maillet.

Eric Anderson, managing director of NXT USA, said specialty ingredients that don’t fit neatly into established mechanisms are standing out, such as the company’s Digexin, an okra and ashwagandha extract that supports digestive well-being by facilitating peristalsis.

“Supports digestive health” is a vague, nebulous claim that almost any probiotic can make, he said. Digestive transit speed, however, is a concrete outcome. Modern stressors and processed food can slow down digestion, and GLP-1 agonist users commonly experience impaired digestive transit, he noted. In two studies on healthy adults with less-frequent bowel movements, Digexin supplementation was associated with a 4-hour decrease in transit time, an increase from three to seven bowel movements per week on average, and a 98% reduction in constipation, reaching clinical significance in seven days.

GLP-1 receptor agonist users, in another study, experienced fewer GI-related complaints, and improved measures of comfort, sleep, stress, and overall well-being scores. “Healthy daily regularity is what consumers are really searching for. They just want to not have to worry about their body’s plumbing,” Anderson said.

GPA noted that ProDigest and Cryptobiotix, ex vivo tools that simulate the human gut, will dramatically accelerate research. “These tools allow staging and focus of clinical activities, enhancing the probability of a successful human program.”

Such a model was used in recent research on fucoidan from the algae Undaria pinnatifida, to validate its prebiotic effects after previous research observed symptom relief in people with ulcerative colitis, Shelley noted. “Fucoidan-enriched colonic microbial diversity and increased levels of the short-chain fatty acid butyrate, known to assist in the maintenance of the gut barrier, stimulate gut motility, and support both innate and adaptive immune responses. The study also showed benefits of repeat dosing with fucoidan over an extended period.”

NXT-USA utilized ProDigest to evaluate Digexin’s potential effects on the microbiome. “We found a 44% increase in butyrate short-chain fatty acid production, which is equivalent or better than prebiotics like inulin and FOS,” Anderson said.

Microbiome interventions in areas outside of the gut are also garnering consumer intrigue.

“Ingredients like OraCMU Weissella cibaria CMU, an oral probiotic designed to target the bacteria responsible for producing foul-smelling gases, are a good example of how specific microbiome-targeted solutions are being developed for distinct areas such as oral health, expanding microbiome support beyond the gut,” Rizo noted.

Most gut health studies, for practical reasons, have focused on the fecal microbiome, in which approximately half of the microbiota is nonviable. But novel sampling tools allow fluid sampling elsewhere in the digestive tract, GPA noted.

Personalization

There is no single image of a healthy gut microbiome; regional, genetic, dietary, and other demographic variations show diverse presentations of what a “healthy” microbiome is.

Observers noted that standard-setting is warranted for how data is analyzed and evaluated in clinical studies and from personalized microbiome testing kits.

While there’s an FAO definition and agreement for probiotics, there’s no such consensus surrounding prebiotics and postbiotics. Another basic roadblock for the industry is frequent misalignment between doses studied in human trials versus those used in finished product formulation, especially for prebiotics, GPA said.

Mainstream gut health research overlooks many potential factors when it comes to defining a “healthy” microbiome. For instance, little is understood about other intestinal microbes, including viruses and fungi. Few studies attempt to account for the role of a microbiome rich in beneficial functional redundancies, too, noted authors of a review published in Gastroenterology in 2021.

“Looking ahead, innovation will likely focus on understanding responder versus non-responder patterns, specifically why certain individuals benefit more from specific interventions,” GPA noted.

Consumers recognize there is no single “gold standard” for a healthy microbiome, said Riera. “Traditionally, probiotics have been a combination of strains brought together in one offering to benefit overall health,” but Kaneka seeks out novel strains with unique mechanisms prior to testing them in humans.

While costs are prohibitive, some service providers are offering genome sequencing-based solutions. “Marinova’s premium marine extracts are increasingly being utilized in evidence-based personalized nutrition,” said Shelley. “These products involve sequencing an individual’s gut microbiome and then manufacturing a personalized formulation. Such subscriptions are high-end offerings, and it’s exciting to see the extent to which wellness brands are willing to go to satisfy consumer demand. It also demonstrates a shift away from selling a product to selling a service.”

As brands partner with testing services, expect more innovation in testing for women’s health, vaginal health, and children’s health applications, Ford said.

Rather than making claims about a product where science hasn’t caught up, or forcing consumers to rely on expensive tests, companies can stay grounded with condition-specific personalization, noted Tamoli. “Not every consumer will do testing, but many will adopt simple self-segmentation: ‘I’m irregular,’ ‘I’m sensitive,’ ‘I bloat,’ ‘I’m traveling,’ ‘I’m on GLP-1.’”

Differentiating products “based on health goals rather than individual diagnostics” is a practical way to personalize, said Julie Imperato, marketing and communication manager at Nexira. The company’s inavea, a blend of baobab and acacia fibers, for instance, was shown to offer targeted support for beneficial microbes such as Akkermansia, making it a standout for metabolic health positioning.

“Addressing the distinct needs of core user segments is a practical and impactful first step toward meaningful personalization,” said Walin. Opportunities lie in targeting different lifestyles, ages, genders, dietary preferences, and health conditions/needs, he said.

Ensuring ingredient platforms are modular can help consumers tailor solutions for themselves, noted Caillat. “We see trends toward personalization through diversification of offerings, focusing on specific individual ingredients … The fermentation-derived ingredients offered by Lallemand Bio-Ingredients fully support that kind of personalization, making precision commercially scalable rather than niche.”

“Brands are offering stackable solutions that allow consumers to build a routine based on their needs, whether that is stress support, metabolic health, oral health, or digestive balance,” said Rizo.

Ingredient suppliers can also establish a clinical evidence base to support claims across diverse demographics, Tamoli noted. CaFi, Logical Square’s Cassia fistula extract, has demonstrated consistent digestive benefits in a pediatric study of 120 healthy children between the ages of 6 and 16 with irregular bowel habits, as well as in clinical studies on adults between the ages of 18 and 70, and in a cohort of geriatric participants who were experiencing constipation or irregular bowel habits. Establishing this safety profile was important because senna, CaFi’s most direct competitor, isn’t recommended for use in pediatric or geriatric populations due to side effects.

Precision Prebiotics & Next-Gen Fiber Blends

Fiber fortification in functional snacks and beverages is achieving the same notoriety as protein fortification, with plenty of new product launches calling fiber content out on front-of-pack labels.

PepsiCo CEO Ramon Laguarta even described fiber as “the next protein” on a conference call with investors in late 2025. Market research firm Datassential found in its 2026 consumer survey on food trends that 52% of consumers were interested in “fibermaxxing” after learning about the trend, and 42% of shoppers assume that if a food is labeled as “high fiber,” it is healthier, with Gen Z over-indexing in fiber interest.

Still, the average U.S. consumer only gets about 15-16 grams of fiber per day, well below the recommended 25-38 grams, with experts describing this shortfall as a “public health concern.”

A fiber ingredient’s purity is critical to food and beverage applications, noted Shiva Elayedath, principal technical services specialist at Cargill. “Our soluble corn fiber product, for example, provides a minimum of 70% fiber material, enabling ‘excellent source of fiber’ claims at 5.6 grams per serving, ‘good source of fiber’ at 2.8 grams, and ‘prebiotic’ claims at 5 grams. Additionally, soluble corn fiber offers improved digestive tolerance compared to fibers such as inulin.” Soluble corn fibers offer prebiotic benefits at the right inclusion levels, and can help support sugar reduction in food and beverages.

“There is significant innovation happening around advanced fibers, including fiber-polyphenol complexes with microbiome interactions,” said GPA. “Emerging science suggests that changing linkages and chain length can create selectively fermented fibers by probiotics that recognize these linkages. The fiber-polyphenol complexes are often whole food sources, highly circular, and have varied or multiple mechanisms … Precision fibers ultimately need evidence to justify their positioning beyond established ingredients.”

More clinically documented fibers are hitting the market. “Research is evolving toward mechanistic endpoints,” Imperato said, such as “microbiota diversity, SCFA production, and metabolic markers,” providing brands with better options for certain health claims or demographic groups. “Precision prebiotic combinations such as acacia-based blends designed to modulate specific microbial pathways, illustrate this evolution.”

As fiber intake rises and new consumer groups, including GLP-1 users, seek solutions that support daily nutrition, digestive tolerance has become a critical requirement, said Imperato. “Acacia-based solutions such as Fibregum and inavea illustrate this evolution, combining microbiome support with slow fermentation profiles that make them particularly suitable for consumers experiencing digestive sensitivity.”

Overall, advanced fiber blends offer controlled fermentation kinetics, improved tolerance, process stability, and more predictable functional outcomes.

Synbiotics Gain Market Share

Synbiotics (pairings of pre-, pro-, and/or postbiotics) are accelerating in product launches. But proving that such a combination offers health effects greater than the sum of its parts is a tall order, requiring a clear purpose in the early stages of product development, said Riera. “We are working on some clinical research with synbiotics, with the preliminary data looking very promising.”

“A true synbiotic refers to a formulation in which a specific prebiotic is intentionally paired with a probiotic strain that utilizes that prebiotic as a substrate,” said Green. “That targeted pairing is relatively rare.” However, certain pairings of pre- and probiotics have complementary/additive benefits not tied to direct substrate feeding, he said. 

More than half (53%) of probiotic supplements launched in 2025 also contained prebiotics, up from 47% the year prior, noted Maillet, citing market research from Mintel. “Synbiotics represent a compelling, system-oriented approach to digestive and microbiome health.”

“Synbiotics are gaining momentum because they offer a clean consumer logic: probiotics plus what they need to thrive,” said Tamoli. “But the market is crowded, and many formulas aren’t truly synergistic.”

Practically, they’re a more convenient alternative for consumers than having to take multiple products, said Walin. “One of the most logical synbiotic-style combinations is the addition of digestive enzymes to probiotics. While most probiotics require consistent use over several weeks to deliver noticeable benefits, enzymes act within minutes to break down food substrates and support digestion.”

Not all prebiotic fibers are well-suited for synbiotic combinations, said Ford. AIDP developed Livaux, a food-grade prebiotic derived from kiwifruit, for combination products, with pre-clinical and clinical data supporting its use in synbiotic formulations. Lower-dose ingredients are key for convenience in complex formulas, Ford added, citing PreticX, a low-dose prebiotic with substantiated claims and minimal adverse effects.

While synbiotics haven’t overtaken standalone pre- or probiotics, there’s been a “broader shift toward combination strategies and more systems-based thinking about microbiome support,” said GPA. “A true synergistic formula would have the support of a four-arm trial: placebo, ingredient 1, ingredient 2, and the combination of ingredient 1 and 2.”

Brands should clearly communicate why a supporting ingredient (pre- or postbiotic) was selected above others, said Caillat. “Lallemand focuses on strain, substrate, and process engineering to produce targeted synbiotics or postbiotic compounds to remain at the forefront of science and fulfill consumer demands.” Failing to do so risks creating confusion in the market, he added.

The Gut-Brain Axis

Research into the gut-brain axis is moving past broad, theoretical observational studies, toward a focus on clear biological outputs, according to Caillat.

Lallemand, in conjunction with the Rosell Institute for Microbiome and Probiotics, conducted some of the first studies to demonstrate a probiotic’s effects on mood and stress, through work with Cerebiome, noted Maillet. The findings laid a foundation for more recent work, establishing the mechanisms by which gut microbes influenced neurotransmitter production, immune modulation, and other gut-brain signaling pathways. “The next phase of gut-brain innovation will rely on multi-mechanism psychobiotic combinations and translating complex biology into accessible consumer benefits.”

Research on how gut chemicals can impact the vagus nerve is still emerging, but scientists have made strides in mapping out vagus nerve cell receptors, the strength of the responses to different gut metabolites, and the resulting benefits on neurocognitive processes.

Riera highlighted recent studies on Lactobacillus plantarum DR7, which may benefit memory, cognition, and emotional well-being in older adults. The probiotic promotes healthy brain metabolism by upregulating the tryptophan-serotonin pathway; it also drives tryptophan toward metabolism into serotonin, diverting it from the kynurenine degradation pathway. Last year the FDA provided a “no questions letter” for the patented strain, supporting its self-affirmed GRAS status.

Shelley noted that emerging in vivo evidence suggests that fucoidans may offer some unique neuroprotective effects, particularly when poor diet contributes to neuroinflammation.

Peristalsis is closely linked to the gut-brain axis, as it is regulated by the enteric nervous system, which communicates with the central nervous system to control timing and coordination, Anderson noted. During periods of stress, patterns may slow or become irregular. Digexin targets “the neuromuscular coordination that drives peristalsis … The result is support for comfortable, regular digestive flow, aligned with the body’s inherent peristaltic function.” The “bi-directional feedback loop” manifests in significant reductions in cortisol and improved serotonin, and lubricated epithelial lining and stool hydration, he added.

Metabolic Health

The adoption of GLP-1 receptor agonists for weight loss continues to increase demand for natural products that can help manage side effects.

“Consumer demand for gentle regularity and digestive comfort will rise. This is an immediate commercial opportunity where ingredients like CaFi can be positioned responsibly as part of a daily routine,” said Tamoli.

The proliferation of GLP-1 drugs has also enhanced awareness of how gut health interventions can support weight management, satiety, blood sugar/lipids, and other related factors.

Microbiome interventions shouldn’t be thought of or presented as standalone solutions, but rather as supportive measures alongside foundational lifestyle factors such as diet quality, fiber intake, exercise, sleep, and mood. Think of them as “adjuncts,” rather than “replacements,” GPA said. “One interesting area is that of fiber-bound polyphenols as prebiotics, with mechanisms of action often impacting the gut lining in some fashion.”

Enzymes can serve as fast-acting tools to enhance metabolism, noted Walin. “Whether enhancing protein utilization or supporting the digestion of gluten, lactose, or high-FODMAP foods, enzymes play a critical role in improving nutrient breakdown and absorption. This is particularly relevant for consumers on restricted or specialized diets, including GLP-1 users, who may benefit from optimized nutrient uptake and digestive efficiency.”

Kaneka Probiotics offers a patented probiotic blend with a targeted mechanism of action for cardiovascular health, noted Riera. “Lactiplantibacillus plantarum strains KABP 011, KABP 012, and KABP 013, marketed as KABP Cardio, support cardiovascular health by regulating lipid metabolism and supporting cholesterol excretion, acting on several metabolites, including bile salts.”

Women’s Health

The gut health segment has been active in industry-wide efforts to account for women’s unique health needs.

Tamoli said he is most impressed with “the category-level realization that women’s health studies must account for cycle stage, life stage, and symptom patterns. Much of the interesting work connects gut health to hormonal and metabolic regulation. Research around estrogen metabolism is gaining attention, along with growing evidence linking gut health, inflammation, and blood sugar regulation to conditions like PCOS, perimenopause, etc.”

The “estrabolome” is the collective gut bacteria and their related genes that metabolize estrogen, enable recirculation into the blood, and support hormone regulation, said Ford. “Decreases in gut microbial diversity disrupt estrogen regulation and vice versa … Certain microbial profiles are linked to significantly reduced symptom severity in menopausal women.”

Kaneka’s KABP Menopause, made up of Levilactobacillus brevis KABP-052, Lactiplantibacillus plantarum KABP-051, and Pediococcus acidilactici KABP-021, takes a multi-pathway approach. The first strain can deconjugate estrogen through high beta-glucuronidase (GUS) activity, an enzyme that boosts the process of recycling estrogen in the body. The other two strains were selected to inhibit opportunistic microbes from affecting the first strain.

A 12-week study found that supplementation with the three strains led to sustained estrogen levels and supported microbiome stability during this transitional phase.

Lallemand Health Ingredients’ Prenatis, a probiotic featuring L. rhamnosus Rosell-11 and B. bifidum HA-132, was shown in a clinical study last year to “significantly reduce maternal infections and show a promising trend toward lower incidence of bacterial vaginosis, one of the most common microbiota-related conditions during pregnancy,” said Maillet. “Prenatis demonstrated vertical transmission from mother to baby, helping establish a healthier gut microbiome in C-section-delivered infants and significantly reducing the number of sick days during the first year of life. Exclusively breastfed infants also showed enhanced colonization of beneficial bacteria, underscoring a ‘maternal-first’ approach to supporting natural defenses and early microbiome development.”

Kaneka’s probiotic marketed as KABP Vaginal Balance was shown to colonize the vaginal tract of over half (55.9%) of participants of a recent study, Riera noted. “Together with in vitro investigations showing broad-spectrum inhibitory activity against a range of urogenital microorganisms, including certain bacteria and yeast, these findings suggest L. gasseri KABP-064 could be effective.”

Among postpartum women, evidence has shown L. rhamnosus HN001 can lead to significantly lower depression and anxiety scores, said Ford. “Mechanistically, there’s a likely modulation in related neurotransmitters such as serotonin and dopamine via the gut axis. AIDP’s Actazin, an enzyme-rich green kiwifruit powder, has demonstrated strong synergistic activity when combined with HN001.”

Immune Support

Following the COVID-19 pandemic, the immune health category has shifted from a focus on infection resistance to overall resilience, and the ability to cope with life’s stressors, said GPA. 

“The microbiome sits at the center of that shift,” said Caillat. “For example, the postbiotic M-Gard yeast beta-glucan supports immune fitness by training the innate immune system rather than driving a single biomarker … Long-term resilience comes from modulating immune responses, not overstimulating them. More broadly, fermentation-based ingredients influence immune health through microbiome-related pathways.”

Gut barrier function is a complex process. The GI tract “strives to keep harmful molecules out of the body and defend against pathogenic organisms, while still allowing nutrients and enabling ‘good’ bacteria to thrive,” said Green, requiring a “robust, selective, dynamic, and balanced immune system.”

Maillet noted that gut-associated lymphoid tissue directly interacts with the intestinal microbiome. Lallemand’s immune-supporting postbiotic Immuse directly activates plasmacytoid dendritic cells, rare sentinel immune cells that bridge innate and adaptive immunity.

Stratum Nutrition’s Bimuno prebiotic aligns with a systems-level approach to immunity, and has been studied for its role in “influencing inflammatory pathways, supporting gut barrier function, and helping the immune system respond more effectively to environmental and dietary challenges,” said Rizo.

Additionally, prebiotics can offer immune-modulating benefits that address inflammation. “Livaux has been shown to increase the ratio of Faecalibacterium prausnitzii, which has multiple beneficial effects, including anti-inflammatory and immune-enhancing activities,” noted Ford.

Companies are introducing the first products to contain live Akkermansia, a unique immune-modulating probiotic that’s difficult to preserve in formulations. While most bacteria feed on fiber, it feeds on mucin, signaling the body to produce fresh, healthy mucus, strengthening the gut barrier. This also prevents pathogen colonization.

In late 2025, Maypro launched AKK Probio, a proprietary strain in both live and inactive forms, chosen from a pool of 200 Akkermansia strains for its stress resistance and high colonization rate. Some of the first controlled human studies on Akkermansia supplementation have been published, showcasing significant reductions in pro-inflammatory markers and cytokines, reduced markers of oxidative stress, improvements in gut hormone signaling such as GLP-1 and PYY, and a higher abundance of beneficial gut microbes overall.