Why does gut health affect the immune system?

Approximately 70% of the body's immune system is located in and around the gut—specifically in gut-associated lymphoid tissue (GALT) and Peyer's patches in the small intestine. The gut microbiome actively communicates with this immune tissue, helping to calibrate immune responses, distinguish between harmless substances and genuine threats, and maintain the kind of controlled, balanced immune activity that protects without overreacting. When the microbiome is disrupted—through poor diet, medications, or occasional stress—these immune calibration signals become less reliable. A healthy, diverse microbiome supported by targeted probiotics and dietary practices is one of the most direct ways to maintain strong immune function.*

Do digestive enzyme supplements work, and who needs them?

Without adequate enzymes, food is incompletely broken down in the small intestine, resulting in fermentation by gut bacteria that produces gas, bloating, and feelings of fullness. Clinical Digestive Enzymes provides full-strength 10x pancreatic enzymes—not diluted formulas—to meaningfully support the breakdown of proteins, fats, and carbohydrates. People who notice consistent discomfort after eating, particularly feeling heavy or bloated within an hour of meals, are good candidates for digestive enzyme support.*

Can I take multiple gut health supplements together?

Yes—Terry Naturally's digestive formulas address different aspects of gut health through distinct mechanisms, and they are designed to work together or independently. A daily probiotic (FloraSure) provides the bacterial balance foundation. Ayurvedic Digestive Formula supports absorption and microflora. Clinical Digestive Enzymes supports food breakdown at mealtimes. Stomach & Intestinal Relief addresses gastric discomfort. Each operates through a different pathway with no meaningful overlap.*

Digestive Health

Gut health supplements: A targeted approach for your digestive system

Q: Why does gut health affect the immune system?

Approximately 70% of the body&#39;s immune system is located in and around the gut—specifically in gut-associated lymphoid tissue (GALT) and Peyer&#39;s patches in the small intestine. The gut microbiome actively communicates with this immune tissue, helping to calibrate immune responses, distinguish between harmless substances and genuine threats, and maintain the kind of controlled, balanced immune activity that protects without overreacting. When the microbiome is disrupted—through poor diet, medications, or occasional stress—these immune calibration signals become less reliable. A healthy, diverse microbiome supported by targeted probiotics and dietary practices is one of the most direct ways to maintain strong immune function.*

Q: Can I take multiple gut health supplements together?

Yes—Terry Naturally&#39;s digestive formulas address different aspects of gut health through distinct mechanisms, and they are designed to work together or independently. A daily probiotic (FloraSure) provides the bacterial balance foundation. Ayurvedic Digestive Formula supports absorption and microflora. Clinical Digestive Enzymes supports food breakdown at mealtimes. Stomach &amp; Intestinal Relief addresses gastric discomfort. Each operates through a different pathway with no meaningful overlap.*

Julie HoerthNatural Health Writer

June 03, 2026 3 min read

70% Of your immune system lives in your gut — making digestive health a whole-body priority

3 strains Clinically studied probiotics in FloraSure® — each with a distinct role in digestive balance*

Trillions Of microorganisms in your gut microbiome — influencing digestion, mood, and immune response

Summary

About 70% of your immune system lives in your gut — which means digestive health is whole-body health. This guide walks through Terry Naturally's targeted gut health formulas: FloraSure® Probiotic for daily microbiome balance (with three clinically studied strains), Ayurvedic Digestive Formula™ for nutrient absorption, Clinical Digestive Enzymes for post-meal comfort, and Stomach & Intestinal Relief for occasional upset.*

Summarize with:

Approximately 70 percent of your immune system lives in your gut. That single fact reframes digestive health from a comfort issue to a whole-body priority. The trillions of microorganisms that make up the gut microbiome—bacteria, fungi, and other microbes living largely in the large intestine—regulate far more than digestion. They influence immune response, mood through the gut-brain axis, inflammation levels, nutrient absorption, and even how well you respond to occasional stress. Supporting this system isn't just about relieving occasional bloating—it's foundational to overall health.

The good news is that gut health supplements don't need to be complicated when they're chosen for your specific needs. Terry Naturally offers several targeted digestive formulas, each addressing a different layer of gut health.*

Start with the foundation: FloraSure® Probiotic

A daily probiotic is the most universally beneficial starting point for gut health support—but not all probiotics deliver equally. The key variable isn't how many colony-forming units (CFUs) a product contains; it's which strains are present and whether those strains have documented clinical support for specific digestive benefits.

FloraSure® Probiotic delivers a targeted combination of three clinically studied, extensively documented strains, each with a distinct role in maintaining digestive balance:*

Lactobacillus plantarum is one of the most resilient probiotic strains available, capable of surviving transit through the stomach acid environment to reach the lower gut where it's needed. It supports the integrity of the intestinal barrier, helps maintain healthy bacterial balance, and has been studied for its role in reducing occasional bloating and digestive discomfort.*

Lactobacillus rhamnosus is one of the most studied probiotic strains in the world and is particularly well-documented for its role in supporting gut barrier function and immune regulation. It helps support how the gut's immune system responds to bacteria and potential irritants—making it especially valuable for maintaining immune resilience alongside digestive balance.*

Bifidobacterium bifidum is a foundational member of a healthy gut microbiome and becomes increasingly important as we age, since levels naturally decline with time. It supports the mucosal lining of the intestine, contributes to healthy bacterial balance, and plays a role in maintaining comfortable and regular digestive function.*

FloraSure is non-dairy based, making it appropriate for individuals with dairy sensitivities, and requires only one capsule daily for consistent microbiome support.*

Capsule Daily — FloraSure® is all you need for consistent, robust microbiome support.*

10x

Full-Strength Enzymes — Undiluted pancreatic support in Clinical Digestive Enzymes with no fillers.*

1000s

Years of Wisdom — Traditional Ayurvedic digestive heritage, clinically validated for optimal nutrient absorption.*

Dairy-Free Formula — FloraSure® is entirely non-dairy based, making it perfect for those with dairy sensitivities.*

Woman and men talking and laughing drinking water

Dietary foundations that support your gut

Supplements work alongside diet—not as a substitute for it. Two dietary factors have an outsized impact on gut health that no supplement can fully compensate for:

First, whole foods over processed ones. Highly processed foods often contain additives, emulsifiers, and refined ingredients that are unrecognizable to the gut's microbial community—and can trigger low-grade inflammatory responses in sensitive individuals. By centering the diet around fruits, vegetables, legumes, whole grains, and minimally processed proteins, you reduce the burden on the digestive system and provide the fiber that beneficial gut bacteria need as fuel.

Second, adequate hydration. Water is essential for the mucosal lining of the intestines, which serves as both a physical barrier and a home for the microbiome. It also helps break down food more efficiently and supports the transit time that keeps digestion regular. Beyond plain water, hydrating foods—cucumbers, watermelon, celery, leafy greens, soups—contribute meaningfully to daily fluid intake.

How the four gut health formulas work together*

FloraSure® builds the foundation

A daily probiotic is the starting point for most people. FloraSure®'s three clinically studied strains — Lactobacillus plantarum, Lactobacillus rhamnosus, and Bifidobacterium bifidum — each support a different layer of digestive and immune balance.*

Enzymes help you break down food

Digestive enzymes break food into forms your body can absorb. Production can drop with age or stress, leading to fullness, gas, and discomfort. Clinical Digestive Enzymes deliver full-strength 10x pancreatic enzymes — not diluted formulas.*

Botanicals match specific needs*

Ayurvedic Digestive Formula™ supports absorption and microflora balance. Stomach & Intestinal Relief soothes the stomach lining and addresses occasional bloating. The right starting point depends on where your discomfort sits.*

Targeted digestive support: matching the formula to the need*

Intestinal microflora is as individual as a fingerprint. This means digestive challenges aren't one-size-fits-all, and neither should be the supplemental support. Terry Naturally offers several targeted digestive formulas, each built around clinically validated ingredients for specific digestive needs.*

Ayurvedic Digestive Formula™: for nutrient absorption and gut microflora*

Traditional Ayurvedic medicine developed sophisticated botanical formulas for digestive health over thousands of years—and modern research continues to validate many of the underlying mechanisms. Ayurvedic Digestive Formula™ brings this tradition to a clinically studied supplement designed to support nutrient absorption, promote healthy gut microflora balance, and help eliminate the waste products of incomplete digestion. It's a good fit for those whose digestive challenges relate more to absorption and regularity than acute occasional discomfort.*

Clinical Digestive Enzymes: For digestive comfort after meals*

Digestive enzymes are the biological catalysts that break down food—proteins, carbohydrates, and fats—into forms the body can absorb. As we age, or under conditions of occasional stress, enzyme production can become insufficient for the foods we eat, leading to feelings of fullness, gas, and discomfort after meals.

Clinical Digestive Enzymes features full-strength, undiluted 10x pancreatic enzymes—a meaningful distinction from many enzyme supplements that dilute their formulas significantly. This potency level means more actual enzyme activity per capsule, providing stronger support for breaking down food efficiently and reducing the digestive discomfort and feelings of fullness that result from inadequate enzyme function.*

Stomach & Intestinal Relief: For occasional upset and bloating*

Some digestive challenges present primarily as occasional upset stomach—burping, feelings of fullness, general gastric discomfort. Stomach & Intestinal Relief is formulated specifically to soothe the stomach and intestinal lining, support comfortable gastric function, and help relieve the occasional bloating and fullness that disrupts daily life. It's the formula to reach for when discomfort is more stomach-centered than lower-GI in nature.*

Finding your gut health starting point

For most people, a daily probiotic like FloraSure is the right foundation— and maintaining the bacterial balance that everything else depends on. From there, the right additional support depends on where digestive challenges primarily occur , absorption and microflora balance (Ayurvedic Digestive Formula), post-meal discomfort (Clinical Digestive Enzymes), or stomach-centered occasional upset (Stomach & Intestinal Relief).*

Explore the full range of Terry Naturally digestive health formulas to find the targeted combination that's right for your gut.*

Explore our Digestive Health Essentials*

8fb8157d-8f96-441f-bace-901ee604938c_medium_b91e4f71-007f-4ec9-9d5a-959a90794e70.png

FloraSure® Probiotic $33.95

e6e4c413-2999-4c54-a4f0-0e0fad4ae2b3_medium_ba2ae084-4fef-4c68-ae54-25deb0198b32.png

Clinical Digestive Enzymes $29.95

5de8bd2a-db53-41d9-8233-947904ccbb5e_medium_694f3f1a-f1c7-4163-bbc3-dba4ab5a6a2c.png

Stomach & Intestinal Relief* $19.95

Approximately 70% of the body's immune system is located in and around the gut—specifically in gut-associated lymphoid tissue (GALT) and Peyer's patches in the small intestine. The gut microbiome actively communicates with this immune tissue, helping to calibrate immune responses, distinguish between harmless substances and genuine threats, and maintain the kind of controlled, balanced immune activity that protects without overreacting. When the microbiome is disrupted—through poor diet, medications, or occasional stress—these immune calibration signals become less reliable. A healthy, diverse microbiome supported by targeted probiotics and dietary practices is one of the most direct ways to maintain strong immune function.*
Without adequate enzymes, food is incompletely broken down in the small intestine, resulting in fermentation by gut bacteria that produces gas, bloating, and feelings of fullness. Clinical Digestive Enzymes provides full-strength 10x pancreatic enzymes—not diluted formulas—to meaningfully support the breakdown of proteins, fats, and carbohydrates. People who notice consistent discomfort after eating, particularly feeling heavy or bloated within an hour of meals, are good candidates for digestive enzyme support.*

Yes—Terry Naturally's digestive formulas address different aspects of gut health through distinct mechanisms, and they are designed to work together or independently. A daily probiotic (FloraSure) provides the bacterial balance foundation. Ayurvedic Digestive Formula supports absorption and microflora. Clinical Digestive Enzymes supports food breakdown at mealtimes. Stomach & Intestinal Relief addresses gastric discomfort. Each operates through a different pathway with no meaningful overlap.*