Kidney–Heart Support
Greycoat Calm
Greycoat Calm
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Kidney–Heart Stability Support
Daily support for cats experiencing gradual kidney and heart changes.
📌NOTICE: Customs duties for U.S. customers are covered by Greycoat Research.
Why do the kidneys and heart change over time?
Kidney and heart cells work nonstop — day and night.For long-term comfort and stability,they need moments of rest and recovery.
How It Works
✔ AMPK
A pathway studied for supporting cellular energy balance.
→ Steady cellular energy
✔ Autophagy
The natural process that helps cells clear and recycle internal components.
→ Natural cellular cleanup
✔ Cortisol balance
Involved in the body’s primary stress-response signal.
→ A calmer stress response
👉 Together, these support everyday kidney- and heart-cell wellness.
Who It’s For
Ideal for cats who may benefit from calm, kidney- and heart-aware routines:
- 7+ years old and showing gentler daily activity
- Follow kidney- or heart-aware care routines
- Receive daily subcutaneous fluids and show stress
Key Actives
Formulated with nutrients studied for cellular balance and calm stress responses.
✔ Berberine
Supports AMPK and steady cellular energy
→ Helps maintain balanced kidney & heart metabolism
✔ Melatonin (Tomato Extract)
Linked with autophagy and nighttime cellular recovery
→ Supports healthy mitochondrial rest patterns
✔ GABA
A calming neurotransmitter studied in pre-clinical models
→ Supports stress-response balance and healthy vascular tone
✔ L-Theanine
Helps maintain a calm parasympathetic state
→ Supports comfort during routine care and hydration support
Synergistic Formula Design
AMPK & cellular energy
- Berberine, Resveratrol, Quercetin
Cellular calm & stress modulation
- GABA, Theanine, Chamomile, Taurine, Vitamin B6
Autophagy & antioxidant renewal
- Melatonin source, Milk Thistle, Strawberry extract, Vitamin C
Evidence-Informed Approach
Backed by research in:
- AMPK cellular energy pathways
- Stress & calm-signaling balance
- Nighttime mitochondrial recovery & antioxidant defense
- Autophagy-related cellular cleansing mechanisms
- Vascular and micro-circulation balance
Based on peer-reviewed science in cellular metabolism and healthy aging biology.
Cat Stories & Reviews
These stories reflect supportive care routines — results may vary by each cat’s needs.
How to Use
✔ When to Give
- 1 capsule once daily, right before the guardian goes to bed.
✔ How to Give
- Give in capsule form —some ingredients may taste bitter.
- A pill gun can help make the process smoother for both guardian and cat.
✔ Tips
- Place a small amount of liquid treat on the pill gun tip
- Follow immediately with a favorite treat
- Keep the routine calm and predictable
About Greycoat Research
Greycoat Research develops supplements focused on kidney wellness in cats.
We focus on
science-led formulations,
consistent routines,
and long-term cellular stability.
- Formulated with internationally recognized safe ingredients
- Strict dosage verification and data-driven quality control
- Rooted in real-world guardian and veterinary experience
Scientific & Clinical Advisors
✔ AIM Advisory
Dr. Toru Miyazaki
✔ Kidney & Heart Care Advisory
Dr. Motoo Kobayashi (DVM)
✔ Internal Clinical & Formulation Review
Dr. Jae-Young Kim (DVM) Alex Shin (Pharm.D)
A Note to Guardians
Caring for a cat with kidney or heart needs takes daily effort.
And over time, both cats and guardians can feel tired.
A simple, steady routine — just one capsule a day — can help support comfort and balance.
Safety Promise
- No preservatives, artificial colors, or flavors
- Reviewed by veterinarians, pharmacists, and researchers
- Only globally recognized safe ingredients
FAQ
Q. Can I give this with other supplements?
Yes — including Dr. Toru Protocol, Intensive Protocol, and Probiotics Protocol.
It is also generally compatible with other supplements.
If you're unsure about combinations, feel free to consult with us.
Q. How should I schedule supplements throughout the day?
Example routine:
- Morning: Dr. Toru + Probiotics
- Evening: Dr. Toru + Intensive
- Before bedtime: Greycoat Calm
Routines may vary depending on your cat’s needs.
Q. How many capsules per day?
The standard recommendation is 1 capsule daily.
Adjustments may be appropriate in certain situations.
Q. My cat resists capsules.
This formula contains naturally bitter compounds,
so opening the capsule may not be ideal for picky cats.
Suggested method:
- Pill gun + small liquid treat
- Reward treat immediately afterward
Q. When might I notice changes?
Every cat is different.
Some guardians have shared observations related to comfort or daily routine within 2–4 weeks.
Start the Routine
Begin your cat’s kidney–heart support routine today.
One capsule a day can help support calm balance and daily comfort.
We’re here with you on this journey.
60-Day Satisfaction Guarantee
Fast, Reliable Global Shipping
Product Details
- Product Name: Greycoat Calm
- Contents: 60 capsules
- Ingredients: Taurine, GABA, Milk Thistle, L-Theanine, Berberine, Blueberry, Ascorbic Acid, Strawberry, Tomato Extract, Chamomile, Quercetin, Resveratrol, Pyridoxine, Microcrystalline Cellulose
- Price: $54.99
- Made in: South Korea
- Feeding Duration:
→ 1 capsule per day regardless of weight: 1 bottle lasts approx. 2 months - Form: Capsule
- Storage: Store in a cool, dry place away from direct sunlight
Our mission is to advance feline kidney health.
— Greycoat Research
Greycoat Calm
FAQ
Can I give this with other supplements?
In most cases, yes. If your cat is already on high-dose antioxidants or specialty compounds, we recommend a consultation.
How many capsules per day?
The standard recommendation is 1 capsule daily. Please consult if adjustments seem necessary.
What if my cat resists capsules?
Use a pill gun with a small amount of liquid treat, followed by a reward treat. This often makes swallowing smoother.
When can I expect results?
Experiences vary. Some guardians have observed supportive changes in their cat’s comfort or routine within 2–4 weeks.