Benefits
Ingredients
Directions
FAQs
Reviews
Jar of Yeast Guard, which supports normal gut flora, 1.25 ounces
product image
Supports normal detoxification of yeast, helps maintain proper gut flora
Comparison chart between 'Yeast Guard' and 'The Rest'
Veterinarian formulated by Dr Patricia Jordan DVM
Our Yeast Guard powder is packed by weight, not jar size
30 day medium dog supply, 31-60 lbs
Organic ingredients including Pau D-Arco, Fennel, Goldenseal, Olive Leaf, Oregano, and Ginger Root
Yeast Guard jar with product facts label on a white background, NASC Certified
Four Leaf Rover uses post consumer recycled PET jars and has funded recovery of 98,969 lbs of plastic product image
Jar of Yeast Guard, which supports normal gut flora, 1.25 ounces
product image
Supports normal detoxification of yeast, helps maintain proper gut flora
Comparison chart between 'Yeast Guard' and 'The Rest'
Veterinarian formulated by Dr Patricia Jordan DVM
Our Yeast Guard powder is packed by weight, not jar size
30 day medium dog supply, 31-60 lbs
Organic ingredients including Pau D-Arco, Fennel, Goldenseal, Olive Leaf, Oregano, and Ginger Root
Yeast Guard jar with product facts label on a white background, NASC Certified
Four Leaf Rover uses post consumer recycled PET jars and has funded recovery of 98,969 lbs of plastic product image

Yeast Guard

Organic herbs that gently support a yeast detox

208 Reviews

Yeast Guard is a powerful blend of organic herbs that helps gently cleanse yeast in dogs without harmful side effects.

  • Supports normal yeast levels
  • Maintains a healthy gut lining
  • Veterinarian formulated
1

Yeast Guard is a powerful blend of organic herbs that helps gently cleanse yeast in dogs without harmful side effects.

  • Supports normal yeast levels
  • Maintains a healthy gut lining
  • Veterinarian formulated

Best Product!

"Archie is my 2 1/2-year-old cream colored golden doodle. So I wondered about the dark fur around his mouth and paw. His vet said it was from yeast in his body/G.I. system. We tried another product which helped a little. After speaking with the proprietor of a wonderful pet supply store in Deland Florida, I tried Yeast Guard. Archie’s vet wholeheartedly approved of the product. And now all that dark hair/fur is back to its natural color! Terrific product! Thank you!"

Dorothy Ann S.

Gentle and Natural Yeast Support

A balanced microbiome is the foundation of healthy skin and coat, clean smelling fur and healthy ears and paws. Yeast Guard supports a healthy microbiome and normal yeast levels.

  • Supports normal yeast levels: This premium blend of organic herbs supports a balanced microbiome while staying gentle on the gut.
  • Veterinarian formulated: You can feel good knowing this supplement was formulated by a holistic veterinarian.
  • Organic and non-GMO Ingredients: The herbs in Yeast Guard are organic for a super premium supplement that's gut friendly.
  • No inactive ingredients: If it's not on the label, it's not in the jar.

Premium Ingredients

Image
Pau d'arco
Image
Organic goldenseal
Image
C8/C10 MCT powder
Image
Organic olive leaf
Image
Organic ginger root

See all ingredients

Ingredients

Pau d'arco
Pau d'arco

Pau d’arco comes from the inner bark of the Tabebuia tree, a staple of traditional South American herbalism. Its compounds lapachol and beta-lapachone support a healthy balance of gut flora. And a balanced gut is where healthy skin starts.

Organic goldenseal
Organic goldenseal

Goldenseal’s star compound is berberine. It helps maintain a healthy gut microbiome and the mucous membranes that line your dog’s digestive tract.

But there’s a catch. Wild goldenseal is an at-risk species, thanks to decades of overharvesting. So we only use cultivated goldenseal. It’s better for the plant … and it’s free of the contaminants wild sources can carry.

C8/C10 MCT powder
C8/C10 MCT powder

Not all MCTs are created equal. Ours contains only caprylic (C8) and capric (C10) acids, the medium chain fats your dog’s body absorbs and uses quickly. We leave out lauric acid (C12) on purpose. It’s technically an MCT, but your dog digests it like a long chain fat (the slow route). C8 and C10 help maintain a balanced microbiome and easy digestion.

Organic olive leaf
Organic olive leaf

Olive leaf is rich in oleuropein, a powerful antioxidant. It supports normal immune function and helps protect the gut lining from everyday oxidative stress.

Organic ginger root
Organic ginger root

A little ginger goes a long way. It supports healthy digestion and adds antioxidant support for skin and gut.

Organic fennel
Organic fennel

Fennel seed gets its sweet licorice flavor from anethole. That same compound supports digestive comfort and a calm, settled gut.

Organic oregano leaf
Organic oregano leaf

Oregano and thyme share two key plant compounds: carvacrol and thymol. Oregano is the carvacrol heavyweight. It helps maintain a balanced gut microbiome and normal yeast levels.

Organic thyme leaf
Organic thyme leaf

Thyme brings the thymol. Paired with oregano, it rounds out the formula’s microbiome support and promotes healthy digestion.

Directions For Use

Give orally daily or as directed by your veterinarian.

 Net Contents: 1.25 oz (35.4g)

Body Weight

1-30 lbs
31-60 lbs
61-90 lbs
91+ lbs

Amount per Day

1/4 tsp daily
1/2 tsp daily
3/4 tsp daily
1 tsp daily

Daily Cost

$0.67/day
$1.33/day
$2.00/day
$2.67/day

How To Get Best Results

An unbalanced gut environment can create conditions that favor yeast overgrowth. Yeast Guard is veterinarian formulated with organic botanicals to help maintain a healthy intestinal environment and microbial balance. For best results, feed your dog a healthy diet low in carbohydrates and follow this simple progression plan:

Week 1

Follow the label directions and give Yeast Guard daily with food. For best results, feed with a fresh food diet such as Meat Mixer. Initial changes may be seen in the first week, but continued daily use is often needed to support more noticeable changes.

Weeks 2-8

Maintain daily use for 30 to 60 days. Many dogs show benefits earlier, but we recommend the full 60 days for lasting results. If small benefits don’t appear within 30 days, add Gut Guard daily to support the gut lining.

Maintenance

Once your dog completes the full 60 days of Yeast Guard and you are happy with the results, transition to Protect for ongoing gut and microbiome support. Protect helps maintain a healthy gut lining and a balanced microbiome and should be used as part of your dog’s daily routine.

Image
Image
Week 1

Follow the label directions and give Yeast Guard daily with food. For best results, feed with a fresh food diet such as Meat Mixer. Initial changes may be seen in the first week, but continued daily use is often needed to support more noticeable changes.

Image
Weeks 2-8

Maintain daily use for 30 to 60 days. Many dogs show benefits earlier, but we recommend the full 60 days for lasting results. If small benefits don’t appear within 30 days, add Gut Guard daily to support the gut lining.

Image
Maintenance

Once your dog completes the full 60 days of Yeast Guard and you are happy with the results, transition to Protect for ongoing gut and microbiome support. Protect helps maintain a healthy gut lining and a balanced microbiome and should be used as part of your dog’s daily routine.

Frequently Asked Questions

How does Yeast Guard support normal yeast balance?
How does Yeast Guard support normal yeast balance?

Yeast Guard combines organic herbs and plant compounds that support a balanced microbiome. It helps maintain a healthy internal environment for comfortable skin and digestion.

Why is yeast balance important?
Why is yeast balance important?

Diet, stress and environmental factors can disrupt normal gut flora. YYeast Guard supports the body’s natural balance and normal cleansing pathways.

How does Yeast Guard support a healthy gut environment?
How does Yeast Guard support a healthy gut environment?

The herbs in Yeast Guard support normal yeast levels and the body’s natural cleansing processes, for a balanced and comfortable digestive system.

What makes Yeast Guard different from other yeast supplements?
What makes Yeast Guard different from other yeast supplements?

Yeast Guard relies on natural botanicals that work with your dog’s system supporting yeast balance without stressing the liver or gut. It’s a gentle, holistic approach to microbial harmony.

What role does pau d’arco play?
What role does pau d’arco play?

Pau d’arco is a traditional herb that supports normal yeast levels and helps the body maintain microbial balance.

Why include organic goldenseal?
Why include organic goldenseal?

Goldenseal supports the body’s natural cleansing processes and promotes a balanced microbial environment in the gut.

What does organic olive leaf do?
What does organic olive leaf do?

Olive leaf supports immune balance and a healthy microbial environment, making it a key part of the formula’s yeast-balance support.

How does C8/C10 MCT powder support yeast balance?
How does C8/C10 MCT powder support yeast balance?

C8/C10 medium-chain triglycerides support a balanced internal environment and the body’s natural cleansing, while staying gentle on the gut.

Is Yeast Guard veterinarian formulated?
Is Yeast Guard veterinarian formulated?

Yes. Yeast Guard was developed by a holistic veterinarian experienced in natural health to ensure safe, gentle, and effective yeast-balancing support.

Can Yeast Guard be used daily or long term?
Can Yeast Guard be used daily or long term?

Yes. It can be used long term, especially for dogs eating processed diets or dogs exposed to everyday toxins.

Why does Yeast Guard carry a California Proposition 65 warning for goldenseal?
Why does Yeast Guard carry a California Proposition 65 warning for goldenseal?

Yeast Guard contains a small amount of goldenseal root powder. California placed goldenseal root powder on its Proposition 65 list in 2015, so we provide the warning as a conservative compliance measure.

The warning does not mean Yeast Guard has been found to cause cancer or that it is unsafe for dogs when used as directed.

California’s listing was based on a two year laboratory study in rats and mice. The animals were fed diets containing goldenseal root powder every day for essentially their entire lives. At the highest exposure, goldenseal made up 2.5% of everything they ate. That translated to daily doses as high as approximately:

  • 1,175 to 1,340 mg per kilogram of body weight in rats
  • 2,875 to 3,275 mg per kilogram of body weight in mice

Those amounts bear little resemblance to the small, measured quantity of goldenseal contained in a serving of Yeast Guard.

The results were also not uniform. Liver tumors increased in rats at the highest concentration and in male mice, while the study found no evidence of carcinogenic activity in female mice. Goldenseal root powder and its major constituent, berberine, were also negative in the genetic toxicity tests reported with the study.

There is inadequate evidence that goldenseal causes cancer in humans. Nevertheless, California’s unusually broad warning law permits an ingredient to be listed based on animal studies involving exposure levels and conditions that may be dramatically different from normal product use.

Proposition 65 is concerned with human exposure, even though Yeast Guard is formulated for dogs. The amount of goldenseal a person could encounter while measuring a normal serving is extremely small. However, California has not provided a simple safe harbor level for goldenseal root powder, and establishing that a warning is unnecessary can require costly product-specific exposure testing and legal analysis.

We use goldenseal as one carefully measured component of Yeast Guard’s herbal formula. The Proposition 65 warning is a conservative legal disclosure—not evidence that the small amount in Yeast Guard presents a meaningful cancer risk during normal use.

Customers Also Bought

Yeast Guard Plus kit, which includes Organ Care powder, Gut Guard powder, and Yeast Guard powder
Yeast Guard Plus
Learn More
$79.99
Jar of Gut Guard, which supports a healthy gut lining, 3.8 ounces
Gut Guard
Learn More
$39.99
Jar of Organ Care powder, a probiotic and enzyme blend, 1.6 ounces
Organ Care (Digest)
Learn More
$29.99
Jar of Bovine Colostrum, 1.04 ounces
Bovine Colostrum
Learn More
$24.99

Yeast Guard Reviews

Who We Are

In Memory of Simon & Aaron

The story of Four Leaf Rover started as a tragedy. Our founder Dana Scott lost two dogs from toxic sprays they were exposed to in the fields surrounding her home. In a frantic effort to save her dogs and protect her remaining dog family, Dana connected with most of the leading holistic veterinarians around the world about the most effective natural remedies. As Dana researched remedies, she found nearly all contained hidden or harmful ingredients. Four Leaf Rover began as a promise to Dana's lost dogs that all dogs deserve super premium products with natural ingredients that are thoroughly tested to be low in harmful pesticides and heavy metals. With a mission of quality, transparency and sustainability, Four Leaf Rover is making the world a better place for dogs and the people who love them.
Four Leaf Rover

Good For Your Dog Good For The Planet

Our Mission

Premium Quality

Trust & Transparency

Sustainability

Why should natural and eco-friendly products come at a premium price? By championing affordability, we're breaking down barriers, ensuring that dog owners don't have to compromise between their pet's health and their budget.
Learn More
Yeast Guard

Find us in a store near you

Shop your favorite Four Leaf Rover products online or find at your local retailer.
Find Us

Never miss out

Join us for exclusive offers, new product releases & more!
Check out our Privacy Policy. Your email is safe with us and you can unsubscribe anytime.

Need help? Chat with us

Need more information? Have a concern? No problem. We're here to help.
© 2026, Four Leaf Rover - The content on this website is not meant to replace veterinary advice. Please support the hard working holistic vets who make this information possible. To find a holistic or homeopathic vet near you or to find one who will do phone consultations, visit The Academy Of Veterinary Homeopathy.