FIGHT VIRUSES, DISEASES, AND CANCERS.
Critical Immune Defense for Dogs & Cats
There simply isn't another product of this quality and strength - with THOUSANDS of testimonials about the results - available on the market!
Critical Immune Defense is a safe, all-natural immune booster that can add years to the life of your dog or cat. Made in the USA.
✔︎ Boosts immune system
✔︎ Reduces inflammation
✔︎ Promotes normal cell growth
✔︎ Protects against toxins in food, water & environment
✔︎ Supports long-term health in both cats and dogs
Critical Immune Defense is a powder that you sprinkle just a small amount on your dog or cat's food. It TASTES GREAT - even for the most finicky of pets.
"Wish there was a human version!! Our large male German shepherd was getting growths on his neck and by his eye. They were getting larger. I saw this product and ordered one canister, not expecting much. However, within 2 weeks, the growths were getting smaller. They finally disappeared! We now give this as a preventative to both of our dogs! Highly recommend it!! Worth the money!!" - Carla
“My cat is 15 and has feline herpes. In the past, I have given her lysine with very little results. Since taking Critical Immune Defense I have seen a steady improvement. Hardly any eye discharge and her nose isn’t wet anymore. No difficulty breathing at all. My son said, “What took you so long to find this stuff?” I also give it to my 3-year-old dog, she’s healthy but …..just in case. They both eat it and have no problem eating all their food.” - Lisa
"This supplement has saved my dog’s life. She is a completely different animal, now. She’s an 11-year-old Maltipoo and was diagnosed with lymphoma last April. She was on chemotherapy, and this supplement along with a healthy greens supplement for 3 months, and her cancer is gone. I have kept her on these supplements, and they continue to work miracles in her little body. She also used to have the worst skin issues, constantly having things removed, and she was just generally not healthy. It’s unbelievable how healthy, happy, and energetic she is. It truly is a miracle!" - Adelle
“I have a rescue and keep 8 senior and special needs cats. I give them this for cats, and it has proven to extend the lives of those who were in danger of losing their lives from cancer, renal failure, and, frankly, only God knows what else! I am grateful for this formula being available for seniors we adore and aren’t really ready to cross the 🌈 yet❣️👍😻 This was Foxy Loxy. He had been failing(14 yrs old), but as he received Pet Wellness Support, he recovered his enjoyment of life, and I could love him for 2 more years❣️ I have other kitties' who had experienced similar recoveries through Pet Wellness. Thank you again!”❣️- Mat
Your pet's immune system is the key to its health! Here's why:
In today’s world, viruses and diseases are rampant, and it can be challenging to protect your pet.
Let’s face it. Your pet lives in a world filled with contamination.
They spend 90% of their waking hours on the floor, mopping up toxins, chemicals, and pollutants.
The household cleaning products, fertilizer on the lawn, and preservatives in their foods can be harmful. Bacteria, airborne contaminants, and viruses transmitted by humans can challenge their health.
Most pets do not eat an optimal diet, and likely do not get as much exercise as they require.
What do you do?
You need to put your pet’s immune system in overdrive!
Research shows that a well-balanced and functional immune system is essential to your pet’s overall health and well-being.
"The immune system acts like a nonstop housekeeper", describes Dr. Donna Raditic, an American College of Veterinary Nutrition (ACVN) diplomate in Athens, Georgia.
It identifies potentially harmful pathogens like bacteria, viruses, fungi, and parasites, then works to eliminate them before they can do harm.
And a pet's immune system monitors cells to ensure they’re working properly.
“When other cells are aging or functioning abnormally—such as a cancer cell reproducing too rapidly—the immune system attempts to step in and maintain proper physiological function and balance,” Dr. Raditic explains.
Your pet's immune system is the key to its health! Here's why:
In today’s world, viruses and diseases are rampant, and it can be challenging to protect your pet.
Let’s face it. Your pet lives in a world filled with contamination.
They spend 90% of their waking hours on the floor, mopping up toxins, chemicals, and pollutants.
The household cleaning products, fertilizer on the lawn, and preservatives in their foods can be harmful. Bacteria, airborne contaminants, and viruses transmitted by humans can challenge their health.
Most pets do not eat an optimal diet, and likely do not get as much exercise as they require.
What do you do?
You need to put your pet’s immune system in overdrive!
Research shows that a well-balanced and functional immune system is essential to your pet’s overall health and well-being.
"The immune system acts like a nonstop housekeeper", describes Dr. Donna Raditic, an American College of Veterinary Nutrition (ACVN) diplomate in Athens, Georgia.
It identifies potentially harmful pathogens like bacteria, viruses, fungi, and parasites, then works to eliminate them before they can do harm.
And a pet's immune system monitors cells to ensure they’re working properly.
“When other cells are aging or functioning abnormally—such as a cancer cell reproducing too rapidly—the immune system attempts to step in and maintain proper physiological function and balance,” Dr. Raditic explains.
Key Ingredients
Turkey Tail Mushroom
This colorful mushroom has been used for centuries in Asia to treat disease and contains high levels of active compounds that have been proven to inhibit the growth of cancerous tumors.
✔︎ Delivers significant amounts of tumor-fighting Polysaccharopeptides (PSPs)
✔︎ Approved by the United States Food & Drug Administration for use in treating prostate and breast cancer in humans
✔︎ Proven to delay the growth of cancerous tumors in dogs and improve their survival rate
Reishi Mushroom
This woody fungi is known as one of the top natural superfoods and has been used for 1000s of years to fight inflammation, cancer, heart disease, hormonal imbalances and more.
✔︎ Contains beta-glucans that increase the immune system’s T-cell levels
✔︎ Lowers inflammatory responses caused by stress, poor diet, and other environmental factors
✔︎ Contains ganoderic acids that have been shown to lower cholesterol levels and blood pressure
Shiitake Mushroom
According to the Journal of Nutrition, shiitake mushrooms provide antiviral, antibacterial and antifungal protection and help to control blood sugar and reduce inflammation.
✔︎ Contains all 8 essential amino acids as well as linoleic acid, an essential fatty acid
✔︎ Used in Japan to treat heart disease, hepatitis, high blood pressure, and infectious diseases
Maitake Mushroom
Maitake mushrooms are loaded with vitamins and active ingredients that stimulate the immune system and promote natural hormone balance and healthy cell growth.
✔︎ Contains beta-1, 6 glucan polysaccharide components that stimulate the immune system and reduce abnormal cell growth
✔︎ Used in Asia to help minimize the toxic effects of radiation and chemotherapy treatment
White Turmeric Root Extract
Turmeric has been used for centuries to reduce pain and inflammation. Its active ingredient, curcumin, has proven to be effective at blocking the growth of certain cancers and protecting against neurodegenerative diseases, arthritis, cardiovascular risks and liver damage.
Our proprietary extract is six times more bioavailable than standard turmeric root, which means it’s more effectively absorbed into your pet’s body and they need less of it to get the same effect. It’s also colorless and milder tasting, making it easier to handle -- and tastier for your pet! No more turmeric stains!
The doctors agree.
Mushrooms = Anticancer Activity
“As a pet lover, I think it makes sense that the compounds in mushrooms be included in your pet’s diet or included by nutritional supplements. Certain mushrooms contain agents with anticancer activity and immunomodulatory properties that may help fight cancer and certain other diseases.”
- Dr. Frank Markland, Professor of biochemistry and molecular medicine at the University of Southern California Keck School of Medicine.
Pet owners CAN make a difference.
“It is the responsibility of the pet owner to do everything possible to minimize the risk of cancer in their pets. This includes a sensible lifestyle with sufficient exercise, weight management, drinking clean water, healthy food intake, and avoiding toxins. Giving your pets a high-quality antioxidant supplement is highly recommended to further reduce the risk of cancer.”
– Dr. Shawn Messonnier, Veterinarian and Founder of Paws & Claws Animal Hospital in Plano, Texas.
More cats and dogs are being diagnosed with cancer than ever before.
“Certain mushrooms and turmeric may be beneficial in helping your pet to boost its immune system to fight diseases,” explains Edwards.
“Cancer is affecting our pets at alarming rates, and it is devastating for both the families of these pets as well as the pets themselves. I am seeing this in my practice on a regular basis.”
- Dr. Jennifer Edwards, Veterinarian at Ponemah Veterinary Hospital in Amherst, New Hampshire.
Your pet’s immune system is one of the most critical parts of its health.
It’s your job to feed and nourish it, and make sure it operates at optimal levels to fight disease and cancers.
Your pet’s immune system is one of the most critical parts of its health.
It’s your job to feed and nourish it, and make sure it operates at optimal levels to fight disease and cancers.
Not only is it easy to use (just sprinkle it over your pet’s food) -- your pet will love the taste!
Approx. 70 Scoops Per Container
NEW Enhanced Formula
Discover Our Enhanced Formula!
We've improved our formula! The new product may appear lighter in color and have a slightly different texture (but the same great taste), thanks to our innovative use of the fruiting body and mycelium of the four mushrooms, instead of mushroom extracts.
Why the Change?
Traditional mushroom extracts are processed using heated water, which is then sprayed to create a powder. Our research suggests that this heat processing can diminish the valuable nutrients in the mushrooms.
Understanding Fruiting Body and Mycelium
Fruiting Body: This is the part of the mushroom you're familiar with—the cap and stem.
Mycelium: These are the nutrient-packed roots and base of the mushroom.
We use the entire mushroom, grinding it into a nutrient-dense powder that boasts higher levels of beta-glucans and polysaccharides than extract powders. Independent testing has shown that our new mushrooms contain up to 250% more beta-glucans and polysaccharides.
Research-Backed Benefits
According to research published by the National Library of Medicine, beta-glucans and polysaccharides are renowned for their metabolic and immunomodulatory properties, including anticancer, antibacterial, and antiviral effects. In some countries, the mushrooms we use in Critical Immune Defense are prescribed not only to prevent cancers and diseases but also to effectively treat them.
Organic and Sustainable
Our mushroom blend is organically grown in Canada on sustainable farms using patented and breakthrough growing processes to enhance the full spectrum of bioactive compounds. It doesn't get any better for your pet!
Experience the powerful benefits of our enhanced formula and give your pets the best in health and wellness!
Made in the USA to the highest quality standards.
VetSmart Formulas is made in the USA in FDA audited facilities which adhere to cGMP and are audited by Underwriter Labs.
Every ingredient is carefully inspected and tested before processing, ensuring a consistently safe, high-quality product for your beloved pet’s health.
Frequently Asked Questions
Is this safe to use with other products?
VetSmart Formulas were originally designed for veterinarians. This means they deliver the clinical-strength quality and efficacy veterinarians demand in products they provide and recommend. They are wheat-free and contain no artificial colors or flavors. Moreover, it can be used along with most products and prescription medications available for pet consumption.
Will it work for my dog too?
Thousands of dogs in all sizes and weights continue to benefit every month from VetSmart Formulas to boost their immune system and overall health.
If your dog has a situation similar to the other dogs you may have read about in our reviews, then this product may likely help your dog too.
Critical Immune defense helps protect your pet against:
- Abnormal cell growth
- Harmful pathogens such as bacteria, viruses, fungi, and parasites
- Inflammation
- Infection
- Cardiovascular disease
- Hormone imbalance
- High blood pressure
- Arthritis
- Liver damage
… and more.
That being said, every dog is unique and unfortunately there are some dogs that have problems this formula cannot solve. This is exactly why we offer a 30 day risk-free money back guarantee.
How much does it cost for shipping?
Great news... not only do we offer a 30-day money back guarantee, we also provide Free Shipping on Domestic Orders Over $100.
If you’re trying this product for the first time and only want to start with 1 bottle, we only charge you our cost of $5.95 for postage and handling. (US Domestic)
What does my pet’s immune system actually do?
We feel this veterinarian does a great job of explaining the immune system in a simple and effective manner:
“The immune system acts like a nonstop housekeeper”, describes Dr. Donna Raditic, an American College of Veterinary Nutrition (ACVN) diplomate who does consulting on nutrition and integrative veterinary medicine in Athens, Georgia. “It identifies potentially harmful pathogens like bacteria, viruses, fungi, and parasites, then works to eliminate them before they can do harm. When other cells are aging or functioning abnormally—such as a cancer cell reproducing too rapidly—the immune system attempts to step in and maintain proper physiological function and balance,” Raditic explains.
My dog or cat is not that old so why do I need to give them this product now?
The time to start any preventative action is before your pet has an issue. As dogs and cats age, their immune systems are not as strong, and they are more susceptible to diseases. A weak immune system in dogs and cats can cause a variety of diseases such as infections, diabetes, osteoarthritis and cancers. Be a proactive pet owner and start boosting your pet’s immune system while they are younger and BEFORE they have an issue.
My pet has a sensitive stomach. Will this product cause issues?
Not likely. However, if you know (or think) that your pet has a sensitive stomach ease into the product slowly. Start with 1/3 or 1/2 the recommended dose and work your way up to full dose over a 1-2 week period. If you notice any issues, simply stop using the product or cut back to find the level that works for your pet.
My dog is taking VetSmart Formulas Hip + Joint Complex and the VetSmart Probiotic. Can I use Critical Immune Defense along with them?
Yes, absolutely! There is no problem using all the products together. And… good for you for being on top of your pet’s health!
My pet currently has cancer and is taking chemotherapy medications. Can I use Critical Immune Defense along with the chemotherapy?
Yes. Our product is all-natural and designed to be taken with chemotherapy medications. It will help boost their immune system that might be compromised by the chemotherapy medications. If your pet is being treated for any serious medical condition, we always suggest that you discuss the use of any supplements with your veterinarian. You can simply bring the bottle to them during a visit or take a photo of the label and share it with your vet.
My pet is taking prescription steroids or pain medications for another health issue. Can I use Critical Immune Defense along with the medications?
Yes. Our product is all-natural and designed to be taken with prescription medications. It will help boost their immune system that might be compromised by the medications. Again, we always suggest that you discuss the use of any supplements with your veterinarian. You can simply bring the bottle to them during a visit or take a photo of the label and share it with your vet.
My pet is so old already. Is it too late to start and will it really make a difference?
No pet is too old to start using an all-natural product that will help them live a better and longer life! It’s similar to someone who starts exercising at 80 years old. Every bit helps! Start now and you will help to prolong your pet’s lifespan!
I love my pet just like a family member. Will Critical Immune Defense prevent them from getting cancer?
We can’t guarantee that, but what we do know is our product is very effective at boosting your pet’s immune system which helps fight all types of diseases such as cancers. The research on the ingredients in Critical Immune Defense is very extensive and Asian cultures have used these ingredients effectively for many centuries.
My pet is a picky eater. How do I give them the product, and does it taste bad?
Critical Immune Defense is very easy to give to your pet. It’s a powder that you simply sprinkle on their food. It has a natural hypo-allergenic chicken flavor that appeals to both dogs and cats, and most pets love the flavor. We offer a 30-day money back guarantee if they don’t like the taste.
You mentioned that almost half (47%) of dogs and 33% of cats over the age of 10 years old get cancer. Those statistics seem very high. Where are they from?
We agree. The numbers are frighteningly high! These statistics were published by the Veterinary Cancer Society. There is so much research and so many clinical studies on the percentages of dogs and cats that get cancer. You can Google it and see the various studies online.
Are Turkey Tail Mushrooms from live turkeys?
No, they are not. Turkey Tail Mushroom, also known as Coriolus Versicolor, is a common type of mushroom that has the shape and color of a turkey tail. What is unique about the Turkey Tail Mushrooms that we use in Critical Immune Defense is the mushrooms are harvested at a very young age when the polysaccharide K (PSK) and peptides are the most concentrated, and these active compounds boost the immune system. As a reference, polysaccharide K (PSK) is an approved mushroom product to treat cancer in Japan.
I tried Critical Immune Defense, but I did not notice a difference in my pet. Why not?
Here’s a way to think about it. High blood pressure is known as the “silent killer.” That’s because people may have high blood pressure for many years and not notice it. However, because there are no visible signs does not mean nothing is happening in your body. The same is the case with boosting your pet’s immune system. You may notice that your pet is more lively or peppy, or you may not notice anything at all. Keep in mind that not seeing a visible result does not mean the product is not working.
I’ve seen other Turkey Tail products for pets online. Is your product any better?
We love this question! Our product is one of the most powerful immune boosters for pets on the market. We have combined a blend of four mushrooms along with turmeric and vitamins to create what we feel is the absolute best immune booster for pets. Our ingredients are standardized to the highest potency and the product is veterinarian strength. We invite you to compare the labels and the ingredients in our product to any others on the market to see for yourself!
I may have given my pet too much product, what do I do? My pet overdosed what do I do? I think my pet is having an allergic reaction, what do I do? I gave my pet some of your product and it is behaving oddly, what do I do?
Call your vet immediately and explain the situation. If your vet is not available, contact the ASPCA Animal Poison Control Center at 888-426-4435.
I thought mushrooms were poisonous for dogs?
Most mushrooms are very beneficial to humans and both cats and dogs, and less than 1% of mushrooms are harmful. The mushrooms that we use in Critical Immune Defense are “medicinal mushrooms” and they have been used to boost immune systems for centuries and are proven to be safe and effective for cats and dogs. For more than 30 years medicinal mushrooms have been approved as cancer treatments in Japan and China. More recently, the U.S. Food and Drug Administration (FDA) has approved clinical trials for Turkey Tail and other medicinal mushrooms.
"We didn't discover turkey tail," says lead investigator Leanna J. Standish, PhD, ND, LAc, FABNO, Medical Director of the Bastyr Integrative Oncology Research Center. "It's been used in Asia for thousands and thousands of years, and it turns out to be a really potent immune therapy. The significance, I think, is that we're bringing a new medicine to cancer patients in the U.S."
Studies are being conducted at several U.S. research universities, including the University of Pennsylvania School of Veterinary Medicine to gather data on the cancer and tumor-fighting effects of mushrooms in dogs, and the development of transformative cancer therapy for pets.
Please do your own online research to learn more about the benefits of the mushrooms in our product and the research being conducted. It is quite amazing!
I noticed that the color of the powder appears lighter. Why?
The new product may look lighter and have a slightly different texture (but the same great taste) due to using the fruiting body and mycelium of the four mushrooms, instead of extracts.
Traditional extracts lose nutrients during heat processing, but our method preserves them. The fruiting body is the cap and stem, and the mycelium is the nutrient-packed roots. Our improved mushroom powder contains up to 250% more beta-glucans and polysaccharides, known for their health benefits, including anticancer, antibacterial, and antiviral effects.
Our mushrooms are also organically grown in Canada using sustainable, patented growing processes. Experience the powerful benefits of our enhanced formula and give your pets the best in health and wellness!
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