Maintaining a healthy gut microbiome is essential for good health and supplementing or eating foods high in beta-glucans can be an important aspect of improving gut health. Our gastrointestinal (GI) tract holds a complex population of bacteria and microbial communities. Sometimes those bacterial communities promote health and other times those bacterial communities do us more harm than good.  One way you can keep your gut healthy is with beta-glucans.  In today’s article, I want to shine some light on the gut-healing benefits of beta-glucans, the foods that contain the highest concentration of beta-glucans, and why you should supplement with them IF you want better gut health. I will also share who should avoid eating and supplementing with beta-glucans and why.

What are Beta-glucans?

So what are Beta Glucans and why are we hearing so much about them in the world of Natural medicine lately? As you probably know, Gut health and research into the microbiome have taken center stage for a variety of metabolic, immune, and gastrointestinal problems.  As Hippocrates said over 2400 years ago, all disease begins in the gut.

Beta-glucans are a type of soluble fiber that is found in the cell walls of certain foods, fungi, and plants. They belong to a group of compounds called polysaccharides and are composed of glucose molecules (*). Think of them as plant sugars.

Foods High in Beta Glucans  

Let’s review some of the foods that contain the highest amount of beta-glucans. One of the most well-known sources of beta-glucans is oats. Oats, especially oat bran, are celebrated not only for their fiber content but also for being particularly rich in beta-glucans. This soluble fiber contributes to the heart health benefits associated with oats by helping to lower cholesterol levels. A daily bowl of oatmeal can provide a significant boost in beta-glucan intake, aiding in heart health and promoting a feeling of fullness, which can be beneficial for weight management.

Barley is another cereal grain that packs a punch with its beta-glucan content. Like oats, barley can lower cholesterol levels and improve heart health. Barley can be enjoyed in soups, salads, and as a side dish, making it a versatile staple in a beta-glucan-rich diet. Hulled or pearl barley can both add a nutty flavor and chewy texture to meals while ensuring a steady intake of this beneficial fiber. Just keep in mind that patients with celiac disease should not consume wheat, Barely, Rye. They may also need to be concerned about Gluten-Cross Reactivity.

Mushrooms offer a plant-based source of beta-glucans, with varieties such as reishi, shiitake, and maitake being especially high in this compound. Beyond their beta-glucan content, these mushrooms are revered in traditional medicine and modern nutraceuticals for their immune-boosting properties. Whether incorporated in stir-fries, soups, or teas, mushrooms are an excellent addition to a health-conscious diet.

If you have celiac disease or Non-Celiac Gluten Sensitivity, you have limited foods to eat that contain high sources of beta-glucans and for this reason, I recommend this supplement.

Yeast, particularly baker’s and brewer’s yeast, also serves as a potent source of beta-glucans. Beta-glucans from yeast are known for their ability to modulate immune function and support overall health, but here again, if you have celiac disease, you may need to avoid bakers or brewers yeast as it’s a known cross reactor for some people with Celiac disease (more on Cross-Reactivity in just a bit).

Don’t mix up S.boulardii and S. cerevisiae. S.boulardii is different from other strains of S. cerevisiae, commonly known as brewer’s yeast and baker’s yeast. People commonly use S. boulardii for treating and preventing diarrhea, including rotaviral diarrhea in children.

The Gut Healing Benefits of Beta Glucans:

Let’s review some of the gut healing benefits of this superfood as some of these might surprise you.

1. Prebiotics and The Gut Microbiome.

Beta-glucans have been found to have a positive impact on gut microbiota by acting as a prebiotic. Prebiotics are indigestible fibers that promote the growth and activity of beneficial bacteria in the gut. But that’s not all they do! Studies have shown that beta-glucans can selectively stimulate the growth of certain beneficial bacteria, such as Bifidobacterium and Lactobacillus, which are key players in maintaining gut health. These beneficial bacteria help break down indigestible fibers, produce short-chain fatty acids (SCFAs),(*), and promote overall gut health.

One of the most important gut healing benefits that we can attribute to beta-glucans is their role in helping improve gut biodiversity. Gut biodiversity is an essential aspect of a healthy gut environment.

Gut biodiversity refers to the variety and abundance of different microorganisms, including bacteria, viruses, fungi, and other microbes, that live in the digestive tract, particularly in the intestines. 

A diverse gut microbiome is generally associated with better health outcomes and resilience against diseases. High gut biodiversity can enhance the gut’s ability to adapt to changes, promote a balanced immune response, and improve metabolic functions. Conversely, low gut biodiversity, which might result from poor diet, antibiotic use, or other factors, is often linked to gastrointestinal disorders, inflammatory conditions, obesity, and other health issues.

There is another interesting benefit of Beta Glucans and that’s the role they play in enhancing our immune system. (*)

2. Enhancing Immune Function

The gut and immune system are closely linked, with a significant portion of immune cells residing in the gut-associated lymphoid tissue (GALT). Beta-glucans stimulate the immune system by interacting with immune cells, such as macrophages, dendritic cells, and natural killer cells. Specifically, beta glucans stimulate the activity of macrophages, which are versatile immune cells that ingest and demolish invading pathogens and stimulate other immune cells to attack.

Macrophages also release cytokines, chemicals that when secreted enable the immune cells to communicate with one another. In addition, beta glucans stimulate lethal white blood cells (lymphocytes) that bind to tumors or viruses, and release chemicals to destroy it.(*) Beta-glucans can modulate the production of pro-inflammatory and anti-inflammatory cytokines, helping to balance immune responses and reduce gut inflammation.(*)

So, as you can see, beta-glucans have a powerful role when it comes to immune function within the gut but there are other gut-healing benefits of beta-glucans especially if you are someone who struggles with bowel regularity.

3. Promoting Digestive Health and Regularity

An important gut healing benefit of beta-glucans is the role it plays in regularity. Having frequent regular bowel movements is essential for overall gut well-being. We know that one of the reasons for bacterial overgrowth or SIBO is constipation. Here again, Beta-glucans contribute to digestive health by improving the transit time of food through the intestines and promoting regularity.

Beta-glucans act as a bulking agent, adding bulk to the stool and increasing the fecal volume. When you increase the bulk of the stool, this activates stretch reflexes and initiates the smooth muscles throughout your GI tract to contract and this in turn helps reduce and prevent constipation.

The other benefit of beta-glucans is that being a soluble fiber, beta-glucans help retain water in the intestines. This softens and lubricates the stool to ease passage and can be helpful for people with hemorrhoids or constipation.

Studies show that Beta-glucans can help maintain healthy levels of cholesterol in the body because beta-glucans can bind to cholesterol in the intestines, inhibiting its absorption into the bloodstream and assisting in its elimination. By reducing cholesterol levels, beta-glucans contribute to cardiovascular health while also helping benefit gut health.

Who Might Need To Avoid Beta Glucans

While there are so many benefits to beta-glucans, some people may find that the soluble fiber (Fermentable) also causes gastrointestinal side effects like bloating, gas, and abdominal cramping when eating or supplementing with beta-glucans. If you are someone who experiences bloating, gas, and abdominal cramping after eating beta glucans you may have an underlying overgrowth of bacteria in your small intestines. This overgrowth is known as SIBO for short.

SIBO and Beta Glucans

Small Intestinal Bacterial Overgrowth, is a condition where excessive bacteria are found in the small intestine. Unlike other portions of the gut, the small intestine typically hosts fewer bacteria. When this balance is disrupted, symptoms such as bloating, diarrhea, abdominal pain, and nutrient malabsorption can occur. The condition is often linked to underlying systemic issues like reduced gut motility, poor dietary habits, or other gastrointestinal disorders.

Those diagnosed with SIBO should consider monitoring their fiber intake. While fiber is generally healthy, focusing on soluble fibers that are less fermentable can help. If you suspect SIBO, Or you struggle with bloating, constipation, or diarrhea,  I recommend you read this article on Fiber and this article on Resistant starches.

Celiac Disease, Gluten Cross-Reactivity, and Beta Glucans

For individuals with celiac disease or gluten sensitivity, maintaining a gluten-free diet is crucial in managing symptoms and protecting their long-term health. However, many people find that despite meticulously avoiding gluten, they continue to experience symptoms. This mystery can often be attributed to a lesser-known issue: gluten cross-reactivity. Understanding this phenomenon can be key to finding relief for those who remain symptomatic.

Gluten cross-reactivity occurs when the immune system mistakenly identifies proteins in non-gluten foods as gluten, prompting similar adverse reactions. This process involves the body’s immune response that is trained to attack gluten, but inadvertently targets other food proteins that resemble gluten in structure. As a result, individuals may experience symptoms similar to those triggered by gluten, such as digestive distress, headaches, fatigue, and joint pain.

Several foods and substances have been identified as potential cross-reactors with gluten. Dairy, particularly casein, is a well-known culprit. Grains, such as corn, oats, and rice, can also induce cross-reactivity. It’s crucial to note that not everyone with gluten sensitivity will react to these foods, but for those who do, identifying and eliminating these triggers can be a crucial step in symptom management. If you suspect Gluten Cross Reactivity I recommend Gluten Cross Reactivity Testing.

It’s important to consult a Certified Functional Medicine Practitioner to guide these dietary adjustments properly.

Identify foods high in beta-glucans, such as certain grains and mushrooms, and evaluate if reducing them correlates with alleviating symptoms. Implement alternatives that maintain nutritional balance but have a reduced impact on fermentation. Since people with SIBO already have excess bacteria in their small intestines, adding fermentable fibers such as beta-glucans can increase the fermentation process, further aggravating digestive discomfort.

I recommend that you read this article on Gluten Cross-Reactivity to see if this may be happening to you.

Here’s What You Need To Remember About The Gut Health Benefits of Beta Glucans

Here’s what I want you to remember about the gut health benefits of beta-glucans. In addition to heart health, beta-glucans are celebrated for their role in immune modulation. They can enhance the body’s immune response to pathogens by activating certain immune cells, making them a topic of interest in studies relating to infection prevention and treatment.

Beta-glucans are known to improve glycemic control, which can assist in managing conditions like diabetes. The soluble fiber in beta-glucans slows the digestion and absorption of carbohydrates, leading to more stable blood sugar levels post meals and better cholesterol levels. This can often help with those feelings of being in a “lunch” coma after eating.

Lastly, let’s not forget that Beta glucans are GREAT for gut health. With their ability to promote healthy gut microbiota, enhance digestive function, improve gut microbial diversity, help maintain the epithelial barrier (gut lining), and help reduce intestinal inflammation. Incorporating beta-glucans into your diet and supplement routine can have a positive impact on your gut.

Grains like barley and oats contain the highest concentration of beta-glucan, but they are also found in Maize, Rye, wheat, and Rice. If for some reason you have celiac disease, gluten sensitivity or you are just trying to avoid grains, the beta-glucans found in Mushrooms like Maitake and Shiitake,  are also excellent sources (*). But as you can see, it’s quite easy to become deficient in this superfood, If you don’t eat grains and you are not a fan of eating mushrooms daily.

I then recommend this gluten-free supplement Beta Glucan Supplement

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