Perimeter MAX
Same six-ingredient mechanism as Perimeter Original, with double the quercetin and bromelain and half again the vitamin C — for horses who need greater coverage across the full 24-hour period.
Why MAX Exists ↓ Join the Progress Update ↓Most horses stabilize on Perimeter Original.
Lorilei didn’t.
Reacher, Wick, and Tae all reached an acceptable comfort level on the original Perimeter formula. Their allergic responses, respiratory symptoms, and inflammatory load responded to the six-ingredient protocol at maintenance doses.
Lorilei is a different story. Her allergic response was severe enough — and her steroid dependency deep enough — that the original formula wasn’t sufficient. She needed more of three specific ingredients to hold.
Perimeter MAX wasn’t a product decision. It was a clinical one. I made it because she needed it.
“I couldn’t get Lorilei to stabilize on Perimeter. I made MAX for her. She’s been stable ever since.”
Lorilei. The reason Perimeter MAX exists.
Lorilei’s Protocol
- Severe allergic response after relocating to Florida
- Steroid-dependent — 21 dexamethasone tablets per day
- At laminitis risk zone on that dose
- Did not stabilize on Perimeter Original
- Stabilized on Perimeter MAX
- Now off dex. Still wears a fly sheet and fly hood daily.
Why Increase These Three?
Quercetin, bromelain, and vitamin C are the three ingredients Lorilei needed more of. Raising them in MAX provides greater plasma concentration coverage across the full 24-hour dosing window — which matters for horses whose inflammatory load requires consistent, higher-level support.
A flavonoid widely studied for mast cell stabilization and histamine response. Doubling the dose in MAX, split AM and PM, keeps higher levels in circulation through the day.
This is the compound Lorilei required at higher levels. MAX doubles it, from 5,000 mg to 10,000 mg per serving.
Read the Quercetin Research →A proteolytic enzyme from pineapple stem that does two jobs: it has its own independent anti-inflammatory activity, and it enhances quercetin absorption — moving quercetin responder rates from 67% to 82% in clinical trials. Water-soluble. Doubling bromelain in MAX, from 1,000 mg to 2,000 mg, amplifies quercetin delivery and provides a higher level of direct enzymatic anti-inflammatory support.
Read the Absorption Research →A water-soluble antioxidant that clears quickly. MAX raises it from 5,000 mg to 7,500 mg per serving, split AM and PM, for steadier coverage through the day.
Read the Research →The Three Remaining Ingredients
Spirulina, MSM (as OptiMSM®), DHA (algae-derived), and the full Perimeter protocol architecture — loading phase, AM/PM split dosing, digital scale — remain identical between Original and MAX. You are not running a different protocol. You are running the same protocol with more quercetin, bromelain, and vitamin C. See the full Perimeter formula →
How to Know Which Formula Is Right
Start with Perimeter Original. The majority of horses stabilize on it. Move to MAX only if your horse does not reach an acceptable comfort level after a full protocol run.
Start Here
Perimeter Original
- Allergic skin conditions or sweet itch
- Insect bite hypersensitivity
- Respiratory inflammation or soft cough
- Joint support and recovery
- General immune and inflammatory support
- Horses not currently on steroids
Reacher, Wick, and Tae all stabilized here. Most horses do.
If Original Isn’t Enough
Perimeter MAX
- Steroid-dependent horses
- Persistent skin flares that don’t resolve on Original
- Significant respiratory involvement — heaves, RAO, equine asthma
- Horses who showed partial improvement on Original but plateaued
- Severe, chronic allergic response with multiple triggers
This is the formula Lorilei required. It exists because she needed it.
Always consult your veterinarian before adjusting a steroid-dependent horse’s supplement protocol.
The Horse Who Needs More
You’ll know if your horse needs MAX. They’re the ones where the standard tools — management, environmental controls, Original — aren’t quite getting there.
Your horse is on dexamethasone, prednisolone, or another corticosteroid and you can’t get them below a threshold dose without a flare. The goal isn’t to replace the steroid — it’s to support the histamine and mast cell response enough that the dose required becomes manageable. That’s what MAX is designed to do.
Rubbing. Hives. Hair loss at the mane and tail. Skin that reacts to everything. You’ve tried the environmental controls. They help, but they’re not enough. The inflammatory load is high enough that the original formula isn’t moving the needle the way you need it to.
Heaves, RAO, equine asthma, or inflammatory airway disease with significant daily involvement. The same mast cell and histamine mechanism that drives skin allergies also drives airway inflammation. MAX addresses that pathway at a higher level of support.
What Perimeter MAX Is. What It’s Not.
This is the same disclaimer that lives on the Perimeter page, and it matters just as much here — maybe more.
Perimeter MAX is not a cure. Lorilei still wears a fly sheet and a fly hood every single day. What MAX does is support the histamine response and mast cell activity at a higher level — enough that traditional management methods and reduced steroid protocols have a better chance of working. It lowers the inflammatory load. It does not eliminate the underlying condition.
Run the loading phase. Split AM and PM. Be consistent. Work with your veterinarian. Use Perimeter MAX alongside everything else your vet recommends — not instead of it.
Be first in line when Perimeter MAX launches.
No spam. No pressure. Just a notification when the product is ready to ship — and first access before it opens to the public. Perimeter and Perimeter MAX launch simultaneously.
Progress Update members are notified first and have first access to order.
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