Fruiting body only

A mushroom has two main parts: the fruiting body (the actual mushroom you would recognize, growing above ground) and the mycelium (the root-like network below). The beneficial immune compounds — called beta-glucans — are concentrated in the fruiting body. Many cheap mushroom supplements use mycelium grown on grain (like brown rice), then grind the whole thing up without separating it. The result can be more than 75 percent grain residue by weight, with very little actual mushroom. These mushrooms are 100 percent fruiting body, with no grain dilution.

Dual extraction

Beta-glucans, the main immune-active compounds in mushrooms, are locked inside tough cell walls and only release with hot water. But another important family of mushroom compounds (called triterpenes, found in reishi) do not dissolve in water — they require alcohol to be extracted. Most mushroom products only use water extraction, leaving out a significant portion of the active compounds. These mushrooms are dual extracted with both hot water and natural alcohol, capturing both families of beneficial compounds.

Guaranteed beta-glucan content

Beta-glucans are the actual measurable indicator of mushroom quality. You can state any number of mushroom species on a label, but without a guaranteed beta-glucan content, there is no way to know how much active immune compound you are actually getting. This formula guarantees an average of over 270 mg of beta-glucans per teaspoon, which is one of the highest concentrations in any dog supplement. That number is testable, verifiable, and meaningful.

Wakes up the immune system's cancer-fighting team — the natural killer cells

Turkey tail contains beta-glucans and a specific compound called polysaccharide-K that activates natural killer cells — the immune cells that specifically search for and destroy abnormal cells, including potentially cancerous ones. The natural killer cell activation from turkey tail is the most studied immune mechanism of any medicinal mushroom in modern research.

A landmark study at the University of Pennsylvania School of Veterinary Medicine examined turkey tail extract in dogs with hemangiosarcoma, an aggressive cancer of the blood vessels. Dogs receiving the highest dose of turkey tail extract had significantly longer survival times than what is typically expected with this disease. This study is among the most frequently cited pieces of evidence for medicinal mushroom use in integrative veterinary medicine.

The immune balancer — calms where the immune system is overreacting, strengthens where it is underperforming

Reishi contains two distinct families of active compounds. The first is beta-glucans, which activate immune cells broadly. The second is a family called triterpenes (which do not dissolve in water and are why dual extraction matters — water-only products lose these entirely). In reishi, these triterpenes provide anti-inflammatory action, gentle calming effects on the nervous system, and liver support. Think of reishi as the mushroom that does the most balancing work in this formula.

Certified Organic Chaga (Inonotus obliquus)

The antioxidant specialist

Chaga grows as a black irregular mass on birch trees in cold northern forests and has the highest antioxidant content of any food ever measured. Active immune work produces enormous numbers of unstable molecules (free radicals) that damage cells the way rust damages metal. Chaga's role in this formula is to neutralize those free radicals before they harm the immune cells doing the work. Think of chaga as the mushroom that protects the fighters while they fight.

Certified Organic Maitake (Grifola frondosa)

Calls immune cells to attention

Maitake means "dancing mushroom" in Japanese — foragers reportedly danced upon finding it because of its rarity and value. It contains a particularly potent form of beta-glucan unique to maitake, which has been specifically studied for its ability to call immune cells into active alert. Maitake also supports healthy blood sugar regulation, which matters for overall metabolic health in senior dogs.

Certified Organic Shiitake (Lentinula edodes)

The most reliable immune mushroom in the formula

The familiar culinary mushroom, with centuries of medicinal use behind it. Shiitake contains a specific beta-glucan compound called lentinan that is so well studied for immune support that it is used as an actual pharmaceutical anti-cancer treatment in Japan. Shiitake is one of the most reliable, well-tolerated immune mushrooms available and provides cardiovascular support alongside its immune action.

Certified Organic Lion's Mane (Hericium erinaceus)

Brings the brain and nervous system into the immune picture

A fluffy white mushroom that resembles an icicle cascade. Lion's mane contains active compounds that support the production of nerve growth factor, a natural protein the body makes to maintain and repair nerve cells. The brain and nervous system influence immune resilience in subtle but real ways. Most immune formulas completely ignore this layer. Lion's mane addresses it.

Certified Organic Cordyceps (Cordyceps militaris)

Gives immune cells the energy to do their job

A mushroom historically prized in high-altitude Tibetan and Nepalese medicine. Cordyceps active compounds support cellular energy production by helping the body use oxygen more efficiently. For dogs whose immune system is depleted from chronic illness, cordyceps provides the energy support the body needs to keep mounting a response. In Traditional Chinese Medicine it also supports kidney function.

Certified Organic Poria + Certified Organic Phellinus

Clearance and depth

Poria (fu ling in Traditional Chinese Medicine) supports fluid balance and helps the body process and clear the metabolic waste that comes with active immune work. It is one of the most commonly prescribed herbs in Traditional Chinese Medicine because it works alongside almost every other herb without overpowering them. Phellinus is less well-known in the West but highly valued in Korean and Japanese medicine for its concentrated immune-active compounds and natural killer cell support for abnormal cells.

Certified Organic Ashwagandha

Stress recovery adaptogen

Chronic immune work is a form of physical stress. Ashwagandha is an adaptogen — an herb that helps the body cope with and recover from that stress — while also providing direct anti-inflammatory and immune-modulating action. Helps regulate cortisol (the stress hormone) and supports the body's ability to keep mounting an immune response over time.

Certified Organic Eleuthero Root

Stamina adaptogen

Where ashwagandha is calming and recovery-focused, eleuthero is energizing and stamina-focused. Together the two adaptogens cover a broader range of stress-recovery needs. Eleuthero helps the body maintain its energy and resilience through extended periods of immune work.

Responsibly Wildcrafted Cat's Claw

Immune modulation and inflammation

A woody vine from the Amazon rainforest. Cat's claw helps balance the immune system by calming overactive responses while strengthening underactive ones — the same immune modulation role it plays in the other formulas where it appears in this catalog. It also provides strong anti-inflammatory action that addresses the chronic background inflammation associated with immune system stress.

Certified Organic Burdock Root

Lymphatic and liver detox support

One of the most respected traditional herbs for supporting the body's natural detoxification pathways. Burdock contains inulin, a fiber that feeds beneficial gut bacteria (a prebiotic). It supports the lymphatic system (the drainage network that clears immune waste), supports the liver, and provides anti-inflammatory action. The lymphatic system is part of the immune system, and burdock is one of the few herbs that specifically supports it.

Certified Organic Dandelion Root and Leaf

Liver and kidney cleansing

The root supports liver function and provides bitter digestive action that stimulates bile production. The leaf supports kidney function. Both are mineral-rich. Active immune work generates waste that the liver and kidneys have to clear, and dandelion helps both organs keep pace with that workload.

Certified Organic Spirulina

Complete protein and heavy metal binding

A blue-green freshwater algae with exceptional nutritional density. Spirulina contains complete protein (all essential amino acids), B vitamins, chlorophyll, and natural antioxidants. It has also been studied for its ability to bind to heavy metals in the digestive tract, supporting a layer of detoxification that other herbs do not address.

Certified Organic Hemp Hearts

Omega fatty acids and cell membrane support

Shelled hemp seeds providing a perfectly balanced ratio of omega-3 and omega-6 fatty acids, complete protein, magnesium, and fiber. Hemp hearts contain no THC and are completely non-psychoactive. The omega fatty acids reduce inflammation throughout the body and provide structural support for cell membranes, including the membranes of immune cells themselves.

Certified Organic Nettle Leaf

Mineral nutrition and natural antihistamine

One of the most mineral-rich plants in herbalism, containing iron, calcium, magnesium, and trace minerals in forms the body can readily absorb. Nettle is also a natural antihistamine, supporting dogs with seasonal allergies, and it supports the adrenal glands (which produce the stress hormones the immune response depends on).

Certified Organic Bee Pollen

Complete amino acids and enzymatic support

One of the most nutritionally complete natural foods, containing all 22 amino acids (including ones the body cannot make on its own), a wide range of B vitamins, natural enzymes, and trace minerals. Used traditionally as an energy and immunity tonic. Note: A very small percentage of dogs have sensitivities to bee pollen — the gradual introduction protocol for this formula helps identify any reaction early.

Certified Organic Alfalfa

Deep root minerals

A deeply rooted plant that pulls trace minerals from deep soil. Rich in chlorophyll, vitamin K, vitamin A, and minerals. Anti-inflammatory and supportive of overall vitality.

Certified Organic Horsetail

Silica and connective tissue

Exceptionally high in silica, essential for healthy connective tissue, strong nails and bones, and a shiny coat. Provides structural support for tissues that often suffer during chronic illness.

Certified Organic Oat Straw

Nervous system nourishment

The green stem of the oat plant, harvested before the grain matures. An herbal nervine — an herb that nourishes and supports the nervous system. Rich in B vitamins and minerals, with gentle calming action that helps the body recover from the stress of sustained immune work.

Certified Organic Neem Leaf

Ayurvedic antimicrobial support

Used in Ayurvedic medicine for thousands of years for antimicrobial, anti-parasitic, and immune-supporting properties. Provides a different type of immune support than the mushrooms — addressing microbial balance and additional antioxidant action. Note: this is neem leaf in a dietary formula, very different from concentrated neem oil.

The Five Digestive Enzymes (32 mg per teaspoon)

Why enzymes are included in an immune formula

A supplement is only as good as what the body can actually absorb. The five enzymes in this formula help unlock the nutrients from the mushrooms and herbs themselves: protease (breaks down proteins), amylase (breaks down starches), bromelain (a natural anti-inflammatory enzyme from pineapple that also breaks down protein), cellulase (breaks down plant cell walls, helping release the compounds locked inside the herbs), and lipase (breaks down fats, supporting absorption of the omega fatty acids from hemp hearts). Without these, some of the nutrition in the herbs passes through undigested.

Lactobacillus acidophilus Probiotic (132 million CFU per teaspoon)

Why a probiotic belongs in an immune formula

Roughly 70 percent of the immune system lives in the gut, in constant conversation with the trillions of bacteria that make up the gut microbiome. CFU stands for colony-forming units, the standard way of counting live bacteria in supplements. Lactobacillus acidophilus is one of the most well-studied beneficial bacteria in pet supplementation. Including it directly in an immune formula means supporting the gut — where most of the immune action actually happens — rather than treating it as an afterthought.

What is the best natural immune supplement for dogs?

The most effective immune supplements address multiple layers of the immune system at once, not just one. A complete immune support approach includes medicinal mushrooms (which activate the natural killer cells that find and destroy abnormal cells), antioxidants (which protect immune cells from damage while they work), adaptogenic herbs (which help the body manage the cellular stress of sustained immune activation), gut support (since 70 percent of the immune system lives in the gut), and detoxification support (which helps clear the waste products of active immune work). Immune Mushroom Plus combines all of these layers in a single formula with nine mushroom species, thirteen herbs, five digestive enzymes, and a probiotic strain.

Do medicinal mushrooms work for dogs with cancer?

The research on medicinal mushrooms for canine cancer is growing. The most well-known study is the University of Pennsylvania School of Veterinary Medicine investigation of turkey tail extract in dogs with hemangiosarcoma, an aggressive cancer of the blood vessels. Dogs receiving the highest dose had significantly longer survival times than is typically expected with this disease. We need to be clear that this does not mean mushrooms cure cancer. What they do is activate the natural killer cells that find and destroy abnormal cells, while providing antioxidant and anti-inflammatory support that helps the body manage the disease and the stress of treatment. Many integrative veterinarians use medicinal mushrooms as part of holistic cancer support protocols alongside conventional treatment.

What is beta-glucan and why does it matter?

Beta-glucans are specific sugar-protein chains found in mushroom cell walls. They bind to specific docking sites on immune cells — particularly on natural killer cells, which scan the body for abnormal or cancerous cells — activating those cells and directing them to do their work more effectively. The beta-glucan content of a mushroom product is the actual measurable indicator of quality and potency. Many cheap mushroom supplements contain very little beta-glucan because they use mycelium grown on grain, with very little actual mushroom fruiting body. Immune Mushroom Plus guarantees an average of over 270 mg of beta-glucans per teaspoon, which is one of the highest concentrations in any dog supplement.

Why does fruiting body versus mycelium matter?

The fruiting body is the actual mushroom you would recognize, growing above ground. The mycelium is the root-like network below ground. Beta-glucans and other active immune compounds are concentrated in the fruiting body. Many cheap supplements use mycelium grown on grain (brown rice or oats), grind up the whole thing, and sell it as a mushroom supplement. The result can be more than 75 percent grain residue by weight, with very little actual mushroom content. Immune Mushroom Plus uses 100 percent fruiting body with no grain dilution, which is why the beta-glucan content is guaranteed at over 270 mg per teaspoon.

What does dual extraction mean and why does it matter?

Dual extraction means using both hot water and natural alcohol to pull active compounds out of the mushroom. Hot water is essential because beta-glucans are locked inside tough mushroom cell walls and only release with heat. Alcohol is essential because another important family of compounds called triterpenes (found in reishi and other mushrooms) do not dissolve in water and require alcohol to extract. Most mushroom products only use water extraction, completely missing the triterpene family of compounds. Dual extraction captures both, delivering a more complete and potent product.

Why is the gradual introduction so important?

This formula contains nine different medicinal mushroom species, thirteen herbs, five enzymes, and a probiotic strain all working together simultaneously. Starting at the full dose introduces too many powerful compounds at once, and some dogs experience digestive upset as a result — even dogs who ultimately tolerate the formula very well. The one-week gradual introduction (starting at one-third dose and increasing over seven days) gives your dog's digestive system, gut bacteria, and immune cells time to adjust. Skipping this step is the most common reason pet parents experience initial digestive upset and assume the formula does not agree with their dog.

Can I give my senior dog this formula proactively?

Many integrative veterinarians recommend medicinal mushroom support proactively for senior dogs, particularly breeds with known higher cancer risk. We need to be clear that no supplement prevents cancer with certainty. What an organic mushroom blend like this does is support the natural killer cells that find and destroy abnormal cells before they develop into tumors, while providing deep antioxidant protection against the cellular damage that contributes to cancer development. This is a reasonable proactive layer in a holistic senior wellness protocol, particularly for high-risk breeds. It does not replace regular veterinary checkups and screening.

What do holistic vets recommend for canine immune support?

Integrative veterinarians typically recommend a layered approach including a high-quality diet, gentle exercise, environmental toxin reduction, gut health support with quality probiotics, and a thoughtful supplement protocol. The supplement layer often includes medicinal mushrooms for immune activation and cancer support, adaptogenic herbs for stress resilience, natural antioxidants for cellular protection, and targeted nutritional support. Immune Mushroom Plus addresses all of these in a single formula. For specific cancer support protocols, many practitioners also add PectaSol Modified Citrus Pectin for its Galectin-3 blocking action.