Denim · Day 90 on Osteo-MAX Denim, Day 90 on the Osteo-MAX and Gut X protocol
Common Questions

The 1 + 1 ships one gallon of Osteo-MAX, one gallon of Gut X, and 2 calibrated pumps, one for each jug. Each gallon is up to a 4-month supply at the maintenance dose, so the two run out together.

The 2 + 2 ships two gallons of each with 4 pumps. The 4 + 4 ships four gallons of each with 4 pumps, two per product.

Gut X handles the gut: absorption, gut health, and immune response. Osteo-MAX handles the structure: bone, joint, and connective tissue. Structural nutrition only counts if the gut can take it up, which is why these two are the foundation the rest of the protocol builds on.
Both are liquids, top-dressed on the feed you already give. Osteo-MAX: load at 2 pumps a day, then hold at 1 pump a day. Gut X: load for the first 14 days at 2 pumps a day, then hold at 1 pump a day. One pump is one ounce, so there is no scooping and no guesswork.
Both are palatable liquids that coat the existing ration, so most horses accept them with no fuss. If yours is especially fussy, our equine nutritionists help you transition, included free with every order.
Because this combo contains Gut X, an active subscription enrolls your horse in the $20,000 Colic Care Coverage Program, reimbursing eligible colic-surgery costs up to $20,000 per horse with a $0 deductible. Coverage begins on day 45 of an active subscription and stays active as long as the subscription runs. One-time orders ship without Colic Care Coverage. Colic Care is a reimbursement program, not insurance, and is not a health claim.
Anytime. Manage everything in your account or by SMS: pause, change delivery dates, or cancel with no fees and no phone tree.

Many owners notice changes from Gut X within 7–14 days, most often in body condition, appetite, manure quality, and coat shine. Osteo-MAX works on a longer clock: most owners report changes in movement, comfort, and willingness to work within the first 30 days, and bone remodels slower still, which is why the loading phase runs 30 to 60 days for bone support.

Neither is a short-term protocol. Both are built to be fed daily as long-term support.

And if you don’t see the difference, you’re backed by our 90-day money-back guarantee.

Osteo-MAX + Gut X · The Foundation Stack

Bone, joint & connective tissue,
on a gut that can use it.

Bone & Joint SupportConnective TissueGut & Immune Support

Osteo-MAX is bone, joint & connective tissue support. Gut X supports gut health & triggers immune response. Fed together they cover the two halves of the same problem: what you put in, and what your horse can actually take up.

Both are delivered in a proprietary liquid form with up to 99% availability1, 2. Powders & pellets must first break apart, hydrate, & disperse inside a moving gut, a slow, variable process that leaves availability as low as 2.5%3.

1Goodridge et al. (2011). doi.org/10.1038/nature100712Balogh et al. (2008). doi.org/10.1021/jf80170293Du et al. (2004). doi.org/10.1002/bdd.392
★★★★★ 4.9 / 5 5,572 reviews 112,000+ horses on product
Free shipping 90-day money-back Pause or cancel anytime
Your one-time order includes
  • ✓90-Day Money-Back Guarantee
  • ✓Free Equine Nutritionist Consultation
  • ✓Up to a 4 month supply per gallon (1 gallon Osteo-MAX + 1 gallon Gut X + 2 pumps)
✓$20,000 Colic Care Coverage Program is a Subscription benefit. One-time orders ship without Colic Care Coverage. Switch to Subscribe to include it.
✓Subscriber pricing saves 20% on every delivery.
Osteo-MAX + Gut X · 1 + 1 Gallon
112,000+Horses supported
USEF / FEIShow compliant
FREE SHIPPINGSame day, ship by 3pm CST
$20,000Colic coverage on subscription
What each one does

Two products. Two jobs.

Osteo-MAX builds and maintains the structure. Gut X keeps the gut able to use what you feed it. Neither replaces the other, which is why they ship together.

Benefits of Osteo-MAX

100% natural equine bone, joint & connective tissue support.

  • Supports Bone Density & Remodeling
  • Supports Joint Comfort & Lubrication
  • Supports Tendons, Ligaments & Connective Tissue
  • Easy to Feed & Economical
  • USEF & FEI Compliant
  • Scientifically Proven Ingredients
  • 90 Day Money Back Guarantee
The research behind it

Mandotori, D. 2021Vitamin K2 has a dual role in bone loss and vascular calcification. Vitamin K2 deficiency is proving to be responsible for the “calcium paradox” phenomenon, characterized by low calcium deposition in the bone.

Refitt, D.M. 2003Orthosilicic acid stimulates collagen synthesis and osteoblastic differentiation. Gene expression of alkaline phosphatase and osteocalcin increased significantly following treatment. Inherent silicon deficiency in animals leads to bone defects and plays an important role in the lack of bone metabolism, bone remodeling and repair.

Zhou, H. 2019Orthosilicic acid “accelerates bone formation” in osteoblast-like cells through PI3K-Akt-mTOR pathways. Numerous animal experiments have shown that an appropriate increase in the intake of highly absorbed silicon is beneficial to enhancing bone density.

Benefits of Gut X

100% natural equine gut health. Supports good gut health & triggers immune response.

  • Supports Good Gut Health
  • Triggers Immune Response
  • Easy to Feed & Economical
  • Peace of Mind
  • USEF & FEI Compliant
  • Scientifically Proven Ingredients
  • 90 Day Money Back Guarantee
The research behind it

Slovis, N. 2016Equine gastric ulceration impacts condition, performance and behavior; the prevalence of ulcers in horses can reach 80–90% of the population.

Sykes, B.W. 2015Preventing Equine Gastric Ulcer Syndrome (EGUS) with proton pump inhibitors will “irreversibly impair” the proton pump. EGUS healing rates ranged between 70–77% on a daily dose of omeprazole for 28 days. The alarming finding for omeprazole as a prophylactic is that 23% of horses experienced worse results.

Slovis, N. 2016Horses given the “all natural” polysaccharide blend of hyaluronan & beta glucan showed that 90% had “complete resolution” or “improvement” in ulceration. Improvements included morphological changes, behavior changes, weight gain and reduction of colic.

Why the pair works

Osteo-MAX + Gut X: the secret to a healthier & happier horse.

Structure and absorption are the same problem viewed from two ends. Feed the structural nutrients into a gut that cannot take them up and you pay for a full dose your horse never gets. Fix the gut and feed nothing structural and there is nothing for it to take up.

01

Osteo-MAX builds the frame

Bone, joint & connective tissue support in one daily ounce, top-dressed over the feed you already give. Silicon as orthosilicic acid, hyaluronic acid, vitamins K2 and D3, and the amino acids collagen is built from, all delivered in solution.

02

Gut X makes it count

Supports gut health & triggers immune response. A liquid hyaluronan and beta glucan blend that supports the gut lining, digestive function, and the nutrient uptake every other supplement in the bucket depends on.

up to 99%Availability of the liquid formPowders & pellets can run as low as 2.5%
4 monthsSupply per gallon at the maintenance dose, for both products

How it is fed Both are liquids on the same feed, twice-daily or once-daily depending on phase. One pump is one ounce, so the dose is exact without scooping. Start the pair →

Customer reviews

5,572 verified reviews from working barns.

Real results. Real reviews. Verified by horse owners on Dr. Peterson’s Protocol.

4.9
★★★★★
out of 5
Based on 5,572 verified reviews
5 stars
96%
4 stars
4%
3 stars
<1%
2 stars
<1%
1 stars
<1%
★★★★★
“I’ve been AMAZED with both Osteo-MAX + Gut X. After only 4 weeks of using Osteo-MAX the x-rays have shown significant improvement already. It’s so wonderful to have a happy, healthy horse again!”
Julie H. ✓ Verified member
The $20,000 promise · subscription benefit

Subscribe, and colic surgery stops being a $20,000 decision.

Colic surgery can run $5,000–$20,000+. Because this combo contains Gut X, every active subscription backs your horse with up to $20,000 in surgical reimbursement, so the worst day isn’t also a financial one. One-time orders ship without Colic Care Coverage.

01

Subscribe & enroll

Any active Osteo-MAX + Gut X subscription enrolls your horse in the 100X Colic Care Program, subject to eligibility conditions and a waiting period. A one-time order does not enroll your horse.

02

Stay covered

Coverage stays active as long as your subscription does. Keep feeding daily gut support, keep the protection in place.

03

Up to $20,000 reimbursed

If your horse needs colic surgery while enrolled, the program reimburses eligible surgical costs up to $20,000, per horse, per event, with a $0 deductible.

$20,000Max reimbursement / horse$0 deductible
Day 45When coverage begins, on an active subscription
Subscription onlyOne-time orders ship without Colic Care Coverage

Colic Care is a reimbursement program, not insurance, and is not a health claim. Eligibility, waiting periods, and terms apply; coverage applies only while a subscription remains active. Full terms are provided with your subscription confirmation. Switch to Subscribe & Save →

$20,000 Colic Care Coverage, on subscription

Because this combo contains Gut X, an active subscription enrolls your horse in our program, reimbursing eligible colic-surgery costs up to $20,000 per horse with a $0 deductible. Coverage begins on day 45 and stays active as long as the subscription does. One-time orders ship without Colic Care Coverage. Colic Care is a reimbursement program, not insurance, and is not a health claim.

100% Satisfaction Guarantee

Every order is backed end to end: free shipping both ways, a real person on the phone at 1-800-677-3574, and a free equine nutritionist consultation if you want help sizing the protocol.

90-Day Money-Back Guarantee

Feed both daily for 90 days. If you don’t see the difference, we refund you, with free shipping on every order.

Subscribe & Save

Put the pair on auto-delivery and lock in a better price on every order. Pause, skip, swap, or change your delivery dates anytime, fully in your control.

Still deciding

Questions, answered.

The 1 + 1 ships one gallon of Osteo-MAX, one gallon of Gut X, and 2 pumpers, one for each jug. The 2 + 2 ships two gallons of each with 4 pumpers, and the 4 + 4 ships four gallons of each with 4 pumpers, two per product. Each gallon is up to a 4 month supply at the maintenance dose. Orders placed before 3:00 pm CST ship the same day, Monday through Friday, with free shipping.
Many owners notice changes from Gut X within 7 to 14 days, most often in body condition, appetite, manure quality, and coat shine. Osteo-MAX works on a longer clock, with most owners reporting changes in movement and comfort within the first 30 days. Neither is a quick fix, and both are backed by our 90-day money-back guarantee.
Yes. They are designed to be fed together on the same feed, and most barns run them as a pair. Both are USEF and FEI compliant with no prohibited substances, so they are cleared for horses showing under either rule set.
Because this combo contains Gut X, an active subscription enrolls your horse in the $20,000 Colic Care Coverage Program, reimbursing eligible colic-surgery costs up to $20,000 per horse, per event, with a $0 deductible. Coverage begins on day 45 of an active subscription and stays active as long as the subscription runs. One-time orders ship without Colic Care Coverage. Colic Care is a reimbursement program, not insurance, and is not a health claim.
Your subscription is fully flexible. Manage it anytime in your account or by SMS: pause, change delivery dates, or cancel with no fees and no phone tree.

Start with the foundation.

Osteo-MAX for bone, joint & connective tissue. Gut X for the gut that has to absorb it. Built on Dr. Peterson’s 47+ years of equine medicine.

Get Osteo-MAX + Gut X

Orders before 3:00 pm CST ship the same day, Monday through Friday. Free shipping on every order.
See the guarantee.

A horse and rider in the arena
Gut X, 1 gallon
Osteo-MAX, 1 gallon
One pump of each, every day
196mgBeta Glucan
200mgHyaluronic Acid
6,975mgAmino Acid Blend
430mgSilicon

Beta glucan and hyaluronan from Gut X. Amino acids and silicon from Osteo-MAX. Two pumps, one feeding.

100% Satisfaction Guarantee
90Days

Feed it for 90 days. If your horse is not doing better, we refund you.

90 day returns on every order. Keep feeding it, tell us it did not work, and we send the money back.

Denim outdoors after 90 days on the protocol
The Foundation Stack

Gut X + Osteo-MAX

★★★★★4.9Gut X 15,932Osteo-MAX 8,834

The two areas horses most often need support, in one shipment. Gut X for the gut, Osteo-MAX for joints, soft tissue and bone.

$2.29/day

Save 20% Today

  • Gastric supportCoats and soothes the stomach lining.
  • Body conditionBetter absorption for weight and topline.
  • Colic supportUp to $20,000 in colic surgery coverage.
Beta glucanAmino Acid BlendSilicon
Free shipping 90-day money-back

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Gut X + Osteo-MAX
Product details

Every active is at the upper end of its peer-reviewed efficacy range. No proprietary blends hiding a dose.

Osteo-MAX’s seven actives and its own reference list are on the Osteo-MAX page.

The systemLiquid SystemProprietary liquid carrier99%availability
The proprietary carrier stabilizes, suspends and pre-disperses every active before feeding, supporting uniform dosing and up to 99%1,2,3 availability, while powders and pellets can assimilate as low as 2.5%4.
Beta Glucanβ-1,3 / 1,6 glucan196mg / oz
β-1,3 / 1,6 glucan, a soluble fiber that works on contact with the gut’s immune tissue, supporting a healthy stomach lining and immune response.1,5,6
Hyaluronic AcidSodium hyaluronate200mg / oz
A high molecular weight form of hyaluronic acid that works on contact, helping form a hydrated, protective coating across the stomach and small intestine.2,3,6,7
References
1Goodridge et al. (2011). 10.1038/nature10071
2Balogh et al. (2008). 10.1021/jf8017029
3Sammarco et al. (2019). 10.3390/cells8091074
4Du et al. (2004). 10.1002/bdd.392
5Tsoni & Brown (2008). 10.1196/annals.1443.019
6Andrews et al. (2025). 10.1111/eve.70009
7Misra et al. (2015). 10.3389/fimmu.2015.00201
8Goodridge et al. (2009). 10.1111/j.1600-065X.2009.00793.x
9Picetti et al. (2021). 10.14202/vetworld.2021.835-840
10Lacerenza et al. (2024). 10.3390/ani14030474
11Slovis (2017). 10.1016/j.jevs.2016.11.011

Load with 2 pumps a day for the first 14 days, then settle into 1 pump a day.

  • Pump it straight over the existing ration. The liquid coats the feed, so picky eaters take it without a fight.
  • One gallon is 128 maintenance doses, up to a 4 month supply for one horse.
  • The loading phase runs about 30 days per gallon.

Most owners notice manure quality, appetite and coat changes in the first week. Gut lining support keeps compounding, with full benefit typically by month 6.

  • Day 1 to 14, the loading dose is doing the work.
  • Day 14 onward, one pump a day holds it.
  • This is daily long-term gut and immune support, not a quick fix.

FREE delivery —. Order within —

The comparison

Why form is the whole game.

The actives are not the differentiator, delivery is. Here is how liquid stacks up against the dry supplements in most feed rooms.

Gut X liquidPowder / pellet
Delivery form
Pre-dispersed liquid, suspendedDry particles, must hydrate
Availability
Up to 99%1,2As low as 2.5%3
Dose accuracy
One pump, exactScoop, settles and separates
Goes to work
On contactMust break down first
Dose consistency
196 mg beta glucan + 200 mg HA, every pumpVaries with settling
References1 Goodridge et al. (2011). 10.1038/nature10071
2 Balogh et al. (2008). 10.1021/jf8017029
3 Du et al. (2004). 10.1002/bdd.392
Why liquid

Ready the moment it hits the gut.

Gut X is delivered in a proprietary liquid form with up to 99% availability1,2. Powders and pellets must first break apart, hydrate and disperse into usable surface area inside a moving gut, a slow, variable process that leaves availability as low as 2.5%3.

1Goodridge et al. (2011)2Balogh et al. (2008)3Du et al. (2004)
Colic Care Coverage

Up to $20,000 toward colic surgery.

Included with every active subscription, at no extra cost. Not insurance you buy, a benefit you keep while you stay on protocol.

01

Subscribe

Your horse is enrolled automatically from the first delivery. No forms, no underwriting, no waiting period beyond the enrollment date.

02

Stay on protocol

Coverage stays active as long as the subscription does. Pause it and coverage pauses with it.

03

If the worst happens

Submit the surgical invoice and we reimburse up to $20,000 of the cost.

$20,000Maximum reimbursement per covered horse
$0Additional cost on any subscription

Program terms, eligibility and exclusions apply. One-time orders are not covered. Read the full terms

Who formulates it
Dr. Russ Peterson, DVM
Dr. Russ Peterson, DVM
MS · DACVSMR · Cert. ISELP
Chief Veterinary Officer

Nearly five decades of equine medicine, sport horse performance, rehabilitation and nutrition. Gut X reflects that standard: clinically studied beta glucan and hyaluronic acid, transparent dosing, and a liquid carrier built to keep the actives stable and dispersed.

100% Satisfaction Guarantee

Start the protocol

One pump a day. Feed it for 90 days, and if your horse is not doing better, we refund you.

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