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Heart & Kidney Support

Greycoat Calm

Greycoat Calm

US$54.99
US$54.99
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Greycoat Calm
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Calm Support for Heart & Kidney

When the heart and kidneys become more sensitive,
a calmer approach to care matters.

Why Calm Matters in Heart & Kidney Care

Repeated tension can contribute to blood pressure instability
and increased metabolic waste,
adding extra burden to heart and kidney care.

In sensitive stages,calm becomes a core part of the care routine.

What Calm Is — And What It Is Not

Calm is not a sedative.
It does not suppress normal behavior.
It is designed to help limit additional heart and kidney burden
by supporting relaxation as part of ongoing care.

Who Should Consider Calm Care

If your cat shows any of the following,
calm-focused care may be worth considering.

  • Becomes highly tense during veterinary visits
  • Shows significant stress after subcutaneous fluid administration
  • Shows increased sensitivity during heart or kidney care

Key Design Principles for Calm Care

✔ Emotional Tension Buffering

Designed to help buffer psychological tension
arising from daily stimuli
and repeated care processes.

✔ Blood Pressure Stability Support

Designed with consideration for
blood pressure strain that may accompany
repeated care routines.

✔ Heart & Kidney Cellular Stability 

Designed to support cellular balance
in the heart and kidneys
under ongoing tension and care-related burden.

Key Ingredients for Heart & Kidney Support

✔ GABA

Helps buffer excitatory responses
during heightened tension.

✔ L-Theanine

Supports relaxation
under daily stimuli and care-related stress.

✔ Quercetin

Included with consideration for
blood pressure burden and cellular stability
under repeated tension.

✔ Indian Barberry Fruit Extract (Standardized for Berberine)

Formulated to support
cellular energy balance
during ongoing stress.

✔ Full Ingredient List

Taurine, GABA, Milk Thistle, L-Theanine,
Quercetin, Indian Barberry Fruit Extract, Blueberry Extract,
Vitamin C, Strawberry Extract, Tomato Extract,
Chamomile Extract, Resveratrol, Vitamin B6

When Calm Can Be Helpful

If your cat is likely to become tense,
give 1 capsule to support calm heart and kidney care.

  • ~1 hour before a vet visit
  • ~1 hour before subcutaneous fluids
  • Before sleep after a long day of care

Up to 2 capsules per day, if needed.

If Your Cat Is Receiving Subcutaneous Fluids

Calm-focused care may help.

✔ Changes Around Fluid Care

After subcutaneous fluid administration, 
the body needs time  
to adjust to sudden shifts in hydration.

✔ Support for the Post-Fluid Period

Calm is formulated with consideration for  
the tension and fluid-related burden  
that may follow fluid administration.

For Greater Care Stability

Calm is designed for combination use with
Dr. Toru, Intensive, Probiotics, and Omega-3—
without adding extra burden,
even when managing both heart and kidney care.

Basic Feeding Guide for Calm

  • 1 capsule per day (standard use)
  • Situational use:
    Vet visits / Subcutaneous fluid care / Before the guardian goes to sleep
  • If needed: Up to 2 capsules per day

For More Structured Care

If needed, up to 2 capsules per day may be given.
This is a general guideline.
Intake may be adjusted based on
your cat’s weight and condition.
A Greycoat Research consultation
can help guide a more personalized approach.

How to Administer

  • Capsules may be opened if needed,
    but whole-capsule administration is recommended due to bitterness.
  • Use a pill giver or a small amount of liquid treat
    to make administration easier.
  • Offer a small reward treat after dosing.

Before Use

✔ If your cat weighs under 2.5 kg:

Please consult before administering.

✔ If your cat is taking other medications or supplements:

Please consult before administering.

FAQ

Q1. Who is Calm designed for?

Calm is designed for cats under kidney care
who show repeated tension or stress
during vet visits, fluid care, or daily routines.

Q2. Is Calm a sedative?

No. Calm is not a sedative.
It does not cause drowsiness
or suppress normal behavior.

Q3. Can cats with CKD or HCM use Calm?

Yes. Calm is designed with consideration for cats
managing kidney disease or HCM.
For sensitive cases, consultation is recommended.

Q4. Is Calm useful for cats receiving subcutaneous fluids?

After fluid care, some cats show tension or stress.
Calm may be used as supportive care
during the post-fluid period.

Q5. Can Calm be used with Dr. Toru or Intensive Protocol?

Yes. Calm is designed for combination use with
Dr. Toru Protocol, Intensive Protocol,
Probiotics Protocol, and Omega-3.

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.

Expert Review & Advisory

Greycoat Research formulas are reviewed with input from:
Veterinarians, pharmacists, and veterinary nutrition specialists.

✔ Jaeyoung Kim, DVM, PhD

Taeneung Cat Specialty Animal Hospital

✔ Motoo Kobayashi, DVM, PhD  

Kobayashi Animal Preventive Medicine Center

✔ Alex Shin, Pharm.D 

60-Day Satisfaction Guarantee

If you’re not satisfied after 60 days of use, we’ll offer a full refund.
Each formula is developed with a science-led nutritional approach.
Still, feline kidney care is a journey — and we’re here with you every step of the way.

Learn More →

Fast, Reliable Global Shipping

All orders are carefully packed and shipped on weekdays.
We ship via official international postal services (EMS & K-Packet).

Estimated delivery times:

  • U.S.: about 5 business days
  • Other countries: about 7–10 business days

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

Why Calm

When tension and stress become part of your cat’s routine,
calm-focused care may be worth considering
to help avoid additional strain on the kidneys.

  • Designed with repeated tension and stress in mind
  • Aims to help prevent added kidney burden associated with tension
  • Suitable for use during vet visits, fluid care, and daily supplement routines
  • 1 capsule per day as a simple baseline when tension is expected

Our mission is to advance feline kidney health.

— Greycoat Research

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Greycoat Calm

US$54.99
US$54.99
Sale Sold out
Shipping calculated at checkout.
View full details

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FAQ

Can I give this with Dr. Toru, Intensive, or Probiotics Protocol?

Yes. It’s designed to fit naturally into those routines without adding stress.

How many capsules per day?

1 capsule daily (regardless of weight).

What if my cat dislikes capsules?

Using a pill gun with a tiny liquid treat can make the process smoother.