Greycoat Probiotics
Kidney-focused probiotics for gut environment support
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- Vet-reviewed
- 60-day Satisfaction guarantee
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Toxin burden support for kidney health
Supports your cat's natural defenses by protecting the first filter — so toxins stay out of the kidneys before they become a burden.
Greycoat Probiotics guarantees 2 billion CFU through July 27, 2027.
Why guardians choose Greycoat Probiotics
- Formulated for cats facing hidden internal stress linked to kidney load
- Supports defenses before toxins burden the kidneys
- Daily use made easy — even for picky cats
- Trusted by vets as the missing piece in kidney care
How to Use
- Daily dose
- 1 capsule per day, regardless of weight
- How to give
- Can be given whole or opened and sprinkled over food
- Picky eaters
- Open the capsule and mix with a small amount of food
- Sensitive cats
- Start with half and increase gradually
- · Some cats may experience mild, temporary soft stools during the first 2–3 days of use — a normal adjustment as the gut microbiome adapts to the new strains.
- · If symptoms persist, reduce the dose and consult your veterinarian.
Product Specifications
- Product Name
- Greycoat Probiotics
- Contents
- 60 capsules
- Form
- Capsule
- Feeding duration
- 1 capsule per day regardless of weight: 1 bottle lasts approx. 2 months
- Ingredients
- L. plantarum, L. acidophilus, L. rhamnosus, L. casei, B. longum, B. bifidum, B. lactis, S. thermophilus, L. bulgaricus
- Made in
- South Korea
- Storage
- Store in a cool, dry place away from direct sunlight
- Price
- $54.99
What makes it different
- · Targeted for toxin burden — not generic digestion
- · Built with 9 strains selected for internal defense and toxin modulation
- · Backed by clinical insights from CKD-focused veterinarians
- · Can be used safely with Greycoat Dr. Toru and Intensive Protocol
Developed with expert insight
Dr. Kobayashi Motoo
Kobayashi Animal Preventive Medicine Center (Tokyo)
- · Veterinarian with over 30 years of experience
- · Focused on managing toxin load in cats with advanced kidney disease
Dr. Kim Jae-young
Veterinarian & longevity researcher
Guardian of Mingki, Korea's 28-year-old cat.
"Mingki had been on probiotics since her youth. I believe this long-term gut care helped her live to 28 — even with kidney disease."
Is this right for your cat?
- · Has lower appetite or energy than usual
- · Is already using Dr. Toru or Intensive Protocol
- · Is showing firm or inconsistent stools — an early sign of internal imbalance
- · May benefit from gentle support to reduce hidden stress on the kidneys
Precision-formulated for kidney wellness
This synbiotic formula combines 9 probiotic strains with prebiotics (FOS) to support feline-specific digestion, gut integrity, and toxin burden relief. Each capsule delivers 2 billion CFU — guaranteed through shelf life, not just at manufacture.
Why it works
- · Contains FOS prebiotics to feed beneficial bacteria
- · Designed to help probiotics survive and colonize effectively
- · Feline-optimized 2 billion CFU per capsule
- · Stability ensured with CSP vial packaging
How it helps
- · Supports internal barrier function to reduce toxin-related burden
- · Helps limit reabsorption of waste compounds linked to kidney stress
- · Enhances microbial balance for long-term systemic support
Strain functions — tailored for cats
- L. plantarum
- Maintains internal lining & pH stability
- L. acidophilus
- Supports a low-toxin environment
- L. rhamnosus
- Promotes immune modulation
- L. casei
- Maintains microbial stability
- B. longum
- Modulates toxin production
- B. bifidum
- Supports internal balance & waste clearance
- B. lactis
- Enhances microbial diversity
- S. thermophilus
- Breaks down nitrogenous waste
- L. bulgaricus
- Supports renal-compatible flora
Designed for cats needing targeted microbiome support to reduce internal toxin load — not just general digestive aid.
Packaging & preservation
To preserve potency, Greycoat Probiotics uses CSP Active Vials.
- · Blocks moisture, heat, and light
- · Shelf-stable — no refrigeration needed
- · Maintains viability through expiration
Compatibility at a glance
60-Day Satisfaction Guarantee
If you're not satisfied after 60 days of use, we'll offer a full refund.
Each formula was developed with a scientifically designed nutritional approach. Still, feline kidney care is a journey — and we're here with you every step of the way.
Fast, Reliable Global Shipping
All orders are carefully packed and shipped on weekdays. We deliver through the official Post Office network (EMS & K-Packet) for trusted, reliable delivery.
Estimated delivery times
- U.S.About 5 business days
- Other countriesAbout 7–10 business days
Warnings
Allergy warning
Some cats may experience mild, temporary soft stools during the first 2–3 days of use — a normal adjustment as the gut microbiome adapts to the new strains. If symptoms persist, reduce the dose and consult your veterinarian.
Veterinary guidance
This is a nutritional supplement and is not intended to diagnose, treat, cure, or prevent any disease. Consult your veterinarian before use if your cat is pregnant, nursing, on prescription medication, or has a pre-existing condition.
Storage
Store in a cool, dry place, away from direct sunlight.
About Greycoat Research
Greycoat Research focuses on long-term kidney care for cats.
Our formulas are informed by:
- 3,500+ one-on-one kidney nutrition consultations
- Feeding data from 10,000+ cats in kidney care
Each formula is developed using carefully selected ingredients and reviewed through a structured, multidisciplinary process.