Greycoat Intensive
A 26-ingredient formula for kidney cell energy and antioxidant support in stage 2 and 3 cats.
- 60-day Satisfaction guarantee
- Vet-reviewed
- 15% Off Your First Order · Sign in and use code KIDNEY at checkout
Healthy kidneys start with healthy cells
A 26-ingredient formula designed to support your cat’s kidney cell health.
26 ingredients in one capsule for kidney cell health
Greycoat Intensive is formulated to support kidney cell health, including energy production and antioxidant protection.
One formula made for cats, so you don’t have to choose and give each ingredient separately.
For cats receiving kidney care, and for everyday cell health support in cats age 7 and older.
Our team helped study resveratrol in cats
Greycoat researchers worked with Dr. Toshiro Arai and Dr. Motoo Kobayashi on a study of resveratrol in cats.
Our formula is reviewed with input from veterinarians, pharmacists, and nutrition specialists.
Drawing on more than 5,000 kidney nutrition consultations, our team provides guidance on supplement compatibility and effective use.
The four-week ingredient study involved healthy, overweight, and obese cats. Consultations are a brand-wide total reported on our official website on October 25, 2026.
Research: Resveratrol supplementation in cats — Yun et al., 2025
Real experiences with energy, appetite, and daily feeding
“More energy.”
“Eating more.”
“He gets his capsules in a Churu Bite and takes them easily with no issues.”
Excerpts from Greycoat Intensive reviews on our official website. These include experiences with the original formula and with other products used alongside it. Individual experiences vary.
3 roles in kidney cell health
Key ingredients
Energy production · Resveratrol and B vitamins
Selected to support energy production and use within cells.
Recycling damaged cell components · Pterostilbene
Ingredient research explores how cells break down and recycle damaged components.
Antioxidant protection · Quercetin and curcumin
Ingredients chosen for their roles in defending cells against oxidative stress.
Based on individual ingredients’ nutritional roles and cell and animal research. See Q7 for details.
Research: Resveratrol and energy production · Pterostilbene and cellular recycling · Quercetin and antioxidant defenses · Curcumin and antioxidant defenses · B-vitamin example: riboflavin
Selected for purity, content, and absorption
Trans-resveratrol: at least 98% purity
Blueberry extract: at least 10% pterostilbene
For curcumin, quercetin, and cranberry extract, we use phytosome ingredients formulated for better absorption.
Purity and content refer to the individual raw ingredients.
Open the capsule and mix into food or a treat
Choose the daily serving for your cat’s weight.
The powder has very little taste or smell. Mix it into their usual food or a lickable treat, or give the capsule whole.
Recommended after a meal.
Product details
- Product
- Greycoat Intensive
- Type
- Nutritional supplement for cats, formulated with kidney cell health and mitochondria in mind
- Capsules per bottle
- 60 capsules
- Feeding Guide
Under 3 kg (6.6 lb)
1 capsule daily
60 days per bottle
3 kg (6.6 lb) and over
2 capsules daily
30 days per bottle
- When to give
- After meals · Split 2 capsules between morning and evening
- How to give
- Give the capsule whole, or open it and mix into a small amount of food
- Formula
- 26 ingredients, counting each of the 8 B vitamins individually
- Made in
- South Korea
- Storage
- Store in a cool, dry place away from direct sunlight
Key ingredients
4 key ingredients
Resveratrol · quercetin · curcumin · blueberry extract containing pterostilbene
8 B vitamins
B1 · B2 · B3 · B5 · B6 · B7 · B9 · B12
5 other vitamins and minerals
Vitamin K2 (MK-7) · vitamin D3 · vitamin C · magnesium · zinc
9 other ingredients
Taurine · N-acetylglucosamine · betaine · glycine · milk thistle · L-theanine · coenzyme Q10 · cranberry extract · L-carnitine
Guaranteed Analysis
| Constituent | Guaranteed value |
|---|---|
| Crude Protein (min) | 59.8% |
| Crude Fat (min) | 3.5% |
| Calcium (min) | 0.1% |
| Phosphorus (min) | 0.1% |
| Crude Fiber (max) | 0.01% |
| Crude Ash (max) | 2.4% |
| Moisture (max) | 9.0% |
A 60-day satisfaction guarantee
If you’re not satisfied after giving the recommended daily amount for 60 consecutive days, we’ll refund the product price.
For your first purchase on our official website, once per product type. Submit your request within 10 days of completing the 60-day period.
Shipping, customs duties, and payment processing fees are excluded. View guarantee terms.
