The Best Supplements to Improve Your Gut Health and Overall Well-being

By Terry
Coyle
08/12/2026
review

Gut health is becoming a major growth opportunity for supplement brands, but winning formulations require more than adding a popular probiotic. Discover nine science-backed ingredients and the formulation considerations that can help your digestive health products stand out.

Key Takeaways

Learn how probiotics, prebiotics, postbiotics, fiber, digestive enzymes, L-glutamine, magnesium, ginger, and botanicals each contribute to digestive health formulations.
Understand how to select science-backed ingredients, clinically relevant dosages, and delivery systems that align with your product’s intended health benefits and target consumers.
Discover the formulation factors that influence product quality, including ingredient compatibility, stability, probiotic viability, and manufacturing considerations.
See why choosing an experienced probiotic supplement contract manufacturer with specialized capabilities can help you bring differentiated digestive health supplements to market with confidence.

Interest in the best supplement for gut health continues to grow as consumers increasingly prioritize digestive wellness, microbiome support, and overall health. For supplement brand owners, this growing demand presents an opportunity to develop innovative products featuring ingredients that support a healthy gut microbiome and address evolving consumer preferences.¹

According to Grand View Research,² the global gut health (i.e., digestive health) market is projected to grow from an estimated $17.8 billion in 2026 to $36.2 billion by 2033, representing a compound annual growth rate (CAGR) of 11.3%.

This article explores nine of the best supplements for gut health, highlighting the functional ingredients behind today’s most popular formulations and how they can help you develop products that stand out in an increasingly competitive marketplace.

9 Best Supplements for Gut Health

The following table provides an overview of nine ingredients commonly used in digestive health formulations.

Whether you’re developing a new product or expanding an existing line, understanding the unique role of each ingredient can help you create formulations that align with your target consumers’ health goals.

Supplement	Potential Area of Support	Common Forms
Probiotics	May help support a balanced gut microbiome and digestive function	Capsules, powders, gummies
Prebiotics	May nourish beneficial gut bacteria and promote microbial diversity	Powders, fibers, capsules
Digestive Enzymes	May support the breakdown of carbohydrates, proteins, and fats	Capsules, chewables
L-Glutamine	Has been studied for its potential role in supporting intestinal barrier function	Powders, capsules
Magnesium	May support normal intestinal muscle function and bowel motility	Citrate, oxide, glycinate
Postbiotics	May provide beneficial microbial compounds that support gut health	Capsules, powders
Ginger Root Extract	Has been studied for its potential role in supporting gastric emptying and digestive comfort	Capsules, extracts
Fiber Supplements	May support digestive regularity and healthy gut microbial activity	Psyllium, PHGG, inulin
Fennel Seed Oil & Turmeric	May support digestive comfort and overall gastrointestinal wellness	Softgels, capsules

Probiotics: Supporting Microbial Diversity

What are probiotic supplements? Probiotic supplements contain live microorganisms that, when consumed in adequate amounts, confer a health benefit on the host. Because of their ability to help maintain a healthy balance of beneficial bacteria in the gastrointestinal tract, they are among the most widely used ingredients in digestive health formulations.

What is the best probiotic supplement for gut health? The answer depends on the intended health benefit and the specific probiotic strains selected, as there is no single probiotic that’s best for every application. Well-studied options include Lacticaseibacillus rhamnosus GG, Bifidobacterium longum 35624, Saccharomyces boulardii, and select Bacillus species.

Because probiotic benefits are strain specific, results observed with one strain should not be generalized to others. For supplement brand owners, selecting the right probiotic involves more than choosing a popular ingredient. Consider the exact strain designation, colony-forming units (CFUs), available clinical evidence, product stability, and any refrigeration or specialized storage requirements to help ensure product quality throughout its shelf life.³ ⁴ ⁵ ⁶ ⁷ ⁸

Prebiotics: Functional Fuel for Beneficial Bacteria

Prebiotics are non-digestible food ingredients that selectively nourish beneficial microorganisms already residing in the gut, whereas probiotics are live microorganisms consumed to provide health benefits.

What is the best prebiotic supplement for gut health? The answer depends on the desired health outcome and the type of prebiotic selected. Well-researched options include inulin, fructooligosaccharides (FOS), and galactooligosaccharides (GOS), all of which help nourish beneficial bacteria such as Bifidobacterium and Lactobacillus, supporting a healthy gut microbiome and digestive function.

For supplement brand owners, selecting the right prebiotic involves evaluating the intended formulation, target consumer, effective dosage, and compatibility with other functional ingredients. Human research demonstrates that prebiotics can favorably alter gut microbial composition, although responses vary depending on the type and dose of prebiotic consumed.⁹ ¹⁰ ¹¹

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Postbiotics: Delivering Beneficial Microbial Metabolites

Postbiotics are preparations of inanimate microorganisms and/or their components that confer a health benefit to the host. Unlike probiotics, which contain live microorganisms, and prebiotics, which selectively nourish beneficial gut bacteria, postbiotics deliver beneficial microbial compounds without relying on living organisms.

Studied postbiotic compounds include heat-inactivated bacteria, cell wall fragments, short-chain fatty acids, enzymes, peptides, and other microbial metabolites. Emerging research suggests these compounds may help support gut barrier integrity, immune function, and gastrointestinal health.

For supplement brand owners, postbiotics offer an emerging opportunity to develop innovative digestive health products with improved formulation stability compared with many live probiotic ingredients. While early research is promising, additional well-designed human clinical trials are needed to further validate the proposed health benefits of postbiotics.¹² ¹³ ¹⁴ ¹⁵

Fiber Supplements: Increasing Dietary Fiber Intake to Support Gut Function

Dietary fiber supplements can promote digestive health through different mechanisms depending on the type of fiber.

What is the best fiber supplement for gut health? The answer depends on the intended health benefit. Viscous fibers, such as psyllium, primarily support bowel regularity and stool consistency, whereas fermentable fibers, including inulin, acacia fiber, and partially hydrolyzed guar gum (PHGG), are metabolized by beneficial gut microbes to produce short-chain fatty acids that support intestinal health.

Developing an effective fiber supplement requires balancing viscosity, fermentability, formulation compatibility, and the desired consumer benefit. Whether the goal is improving digestive regularity, supporting the gut microbiome, or addressing both, choosing the appropriate fiber can help create a more effective and differentiated product.¹⁶ ¹⁷ ¹⁸ ¹⁹ ²⁰

Digestive Enzymes: Enhancing Nutrient Breakdown Efficiency

Digestive enzyme supplements are formulated to help break down specific nutrients when the body’s natural digestive capacity is inadequate or when digestive challenges exist.

Common digestive enzymes include proteases (proteins), amylases (carbohydrates), lipases (fats), lactase (lactose), cellulases (plant fiber), and α-galactosidase (complex carbohydrates). These enzymes may be derived from animal sources, such as pancreatin, plants, including bromelain and papain, or fungal fermentation, such as Aspergillus oryzae. Each source differs in enzyme composition and optimal pH activity.

Selecting the right enzyme blend depends on your product’s intended benefits, target consumer, and supporting clinical evidence. Certain enzymes have well-established applications, such as lactase for lactose intolerance, whereas broader digestive health benefits may vary depending on the specific enzyme and formulation.²¹ ²² ²³ ²⁴ ²⁵

L-Glutamine: Supporting Intestinal Integrity Pathways

L-glutamine is the most abundant free amino acid in the body and serves as an important fuel source for rapidly dividing cells, including intestinal epithelial cells. For this reason, it is commonly included in dietary supplements formulated to support gut-lining health.

What is the best glutamine supplement for gut health? Based on the available clinical research, L-glutamine is generally the preferred form because most human studies have evaluated its potential to support intestinal barrier integrity and normal gastrointestinal function. While other forms, including glutamine peptides, N-acetyl-L-glutamine, and alanyl-L-glutamine, are available, they have been studied less extensively for these applications.

Researchers continue to investigate L-glutamine for its potential role in maintaining intestinal barrier integrity, particularly during periods of physiological stress. Although the findings are promising, human studies have produced mixed results, and additional well-controlled clinical trials are needed to better understand its potential benefits in healthy individuals.²⁶ ²⁷ ²⁸ ²⁹

Fennel Seed Oil and Turmeric for Digestive Comfort

Looking for the best supplement for gut health and bloating? From a product development perspective, formulations targeting digestive comfort and occasional bloating often combine botanical ingredients with complementary digestive health compounds. Fennel seed oil (Foeniculum vulgare) and turmeric (Curcuma longa) are two well-studied botanicals commonly included in these formulations because of their potential to support post-meal comfort, digestive ease, and occasional bloating.

Clinical studies suggest these ingredients may promote normal gastrointestinal function, although outcomes depend on the extract, dosage, and overall formulation.

When developing a digestive health supplement, consider using standardized botanical extracts, clinically relevant dosages, and ingredient combinations that complement your product’s intended benefits. Formulation stability and compatibility with your chosen delivery system, whether capsules, tablets, or powders are also important considerations for delivering a high-quality finished product.³⁰ ³¹ ³² ³³

Magnesium: Supporting Normal Intestinal Muscle Function

Magnesium is an essential mineral that helps regulate normal muscle contraction and relaxation, including the smooth muscle activity involved in intestinal motility.

Not all forms of magnesium serve the same purpose. Magnesium citrate and magnesium oxide are commonly included in supplements intended to support bowel function because of their osmotic effects in the intestine, whereas magnesium glycinate is generally better absorbed and less likely to influence bowel habits.

When selecting a magnesium ingredient, the choice should align with your product’s intended benefits and target consumer. Understanding the functional differences between magnesium forms can help you develop a formulation that delivers the desired nutritional or gastrointestinal support.³⁴ ³⁵ ³⁶ ³⁷ ³⁸

Ginger Root Extract: Modulating Gastric Emptying and Digestive Function

Ginger root extract, derived from the rhizome of Zingiber officinale, contains several bioactive compounds, primarily gingerols and their dehydration products, shogaols. These phytochemicals have been extensively studied for their effects on digestive physiology.

Human studies suggest that ginger may support normal gastric emptying and digestive function, although responses can vary depending on the extract, dosage, and formulation.

When incorporating ginger into a digestive health supplement, consider using standardized extracts with consistent gingerol content to help support product quality and formulation consistency. Ginger is available in several forms, including dried root powder, liquid extracts, capsules, and standardized extracts, providing flexibility when developing products for different delivery systems and consumer preferences.³⁹ ⁴⁰ ⁴¹ ⁴² ⁴³

How to Choose the Right Gut Health Supplement Ingredients for Your Brand

What makes the best supplement for gut health? The answer depends on your product’s intended health benefit, target consumer, and the scientific evidence supporting the formulation. Whether you’re developing a supplement for digestive regularity, microbiome support, intestinal barrier health, or overall digestive wellness, every ingredient should support your product’s positioning and intended purpose.

Prioritize clinically studied ingredients used at research-supported dosages, and identify specific probiotic strains, botanical extracts, and other functional ingredients rather than relying on proprietary blends. Ingredient quality, standardization, stability, and compatibility with your chosen delivery system should also be evaluated early in the formulation design process to help ensure consistent product performance.⁴⁴ ⁴⁵ ⁴⁶ ⁴⁷ ⁴⁸

Finally, think beyond individual ingredients. The most successful gut health formulations combine complementary ingredients, appropriate delivery systems, and science-backed product claims to create a differentiated product that resonates with your target market and builds long-term confidence in your brand.

Turn Your Gut Health Supplement Concept into a Market-Ready Product

So, what is the best supplement for gut health? There is no one-size-fits-all answer. The most successful products are built around clearly defined health goals, clinically supported ingredients, research-backed dosages, and thoughtful formulation strategies that align with your target consumers’ needs.

Whether you’re developing a probiotic, prebiotic, postbiotic, fiber, digestive enzyme, or multi-ingredient digestive health supplement, choosing the right contract manufacturer is just as important as selecting the right ingredients. As an experienced probiotics contract manufacturer, Vitaquest is the largest custom, non-originator contract manufacturing facility for probiotic dietary supplements in the United States.

Our dedicated Probiotics Manufacturing Suite features specialized blending and encapsulation environments with advanced environmental controls designed to help protect probiotic viability, potency, and product quality throughout the manufacturing process. Backed by more than 45 years of nutraceutical manufacturing expertise, we help emerging and established brands formulate, manufacture, package, and launch high-quality digestive health supplements.

Are you ready to capitalize on your new understanding of supplements for gut health? If so, call 800-526-9095 to speak with one of our knowledgeable production specialists or request a nutraceutical manufacturing price quote if you’ve already finalized your project requirements! 

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Frequently Asked Questions about Gut Health Supplements

What defines a gut health supplement formulation?

A gut health supplement formulation combines ingredients selected to support specific aspects of digestive wellness, such as microbiome balance, digestive regularity, or intestinal barrier function. Effective formulations use clinically studied ingredients at research-supported dosages while considering ingredient compatibility, stability, delivery format, and overall product quality.

How do probiotics differ from prebiotics in formulation?

Probiotics are live microorganisms that require careful attention to strain selection, stability, moisture control, and packaging to maintain viability. Prebiotics are non-digestible compounds that nourish beneficial gut bacteria and are generally more stable, making ingredient compatibility, dosage, and formulation objectives the primary development considerations.

What determines ingredient selection in gut health products?

Ingredient selection should reflect your product’s intended health benefits and the scientific evidence supporting each ingredient. Additional considerations include clinically relevant dosages, ingredient quality, stability, compatibility with other ingredients, delivery format, regulatory compliance, and the preferences of your target consumers.

Which delivery formats are most suitable for gut health ingredients?

The ideal delivery format depends on the ingredient profile and intended product benefits. Capsules are commonly used for probiotics, powders for fiber and prebiotics, and tablets for enzymes, minerals, and botanicals. Stability, dosage requirements, consumer preferences, and manufacturing considerations should all influence delivery system selection.

Why is a balanced formulation approach important?

A balanced formulation combines complementary ingredients that work together to support specific digestive health goals. Selecting clinically supported ingredients at appropriate dosages while considering compatibility, stability, and delivery format helps create a differentiated product that delivers consistent quality and performance.

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Contents

Terry

Coyle

Chief Innovation Officer

Terry Coyle, now serving as the Chief Innovation Officer at Vitaquest, previously held the position of Vice President for Product Development & Regulatory Affairs. With an MBA from NYU Stern School of Business, Terry boasts 28 years of experience within the company. Leading a team of over 20 scientists, flavorists, and regulatory experts, Terry’s remarkable leadership has driven the successful development and launch of an impressive portfolio of more than 12,500 products.