Hindgut Ulcer Support for Horses

Looking for hindgut ulcer support for your horse? We start with ImmuBiome G-Tract—daily nutritional support for hindgut comfort and digestive balance when training, travel, or ration changes add stress.

These supplements are for nutritional support only. They are not intended to diagnose, treat, cure, or prevent disease. Work with your veterinarian for clinical care.

EQUINE DIGESTIVE · HINDGUT · ULCER SUPPORT

When training, travel, or ration changes stress digestion, most owners want one clear hindgut starting point. We start with G-Tract—ImmuBiome’s go-to formula for everyday digestive balance and hindgut comfort. Super Concentrate is listed second for broader daily microbiome support. Pair either with smart feeding and your veterinarian’s guidance.

ImmuBiome G-Tract

ImmuBiome G-Tract

From $69.00
ImmuBiome Super Concentrate

ImmuBiome Super Concentrate

From $138.00

Helping your horse feel good from the gut out

For the everyday things that upset a horse’s stomach—training, travel, stall time, and feed changes
Hindgut comfort — horse grazing green pasture close-up

Hindgut comfort

Support a steady hindgut environment when work, travel, stall time, or ration changes challenge digestion.

Ulcer support — bay horse in misty paddock

Ulcer support

Nutritional ulcer support for the digestive tract—daily nutritional help, not a drug, diagnosis, or cure.

Foregut to hindgut — pasture forage wellness visual

Foregut to hindgut

Prebiotics, probiotics, live yeast, colostrum, and beta-glucans work together for whole-tract digestive resilience.

Why G-Tract for hindgut ulcer support

Our go-to for gut comfort

We start with G-Tract because it’s built for equine digestive balance from foregut to hindgut—mushroom-sourced prebiotics (Turkey Tail & Lion’s Mane), multi-strain probiotics, live Saccharomyces yeast, bovine colostrum, and beta-glucans.

Prefer a broader daily foundation? Super Concentrate is a good second option for owners who want general microbiome support alongside ulcer-focused care.

Use either as part of consistent feeding and management. For diagnosis, treatment, or medication decisions, always partner with your veterinarian.

Shop G-Tract

Why horse owners choose ImmuBiome

Trusted by riders every day

Owner-trusted

G-Tract averages 4.93★ across 750+ owner reviews

Equine-focused

Formulas designed around the horse microbiome

Ships from Idaho

UPS from Eden · free shipping on US subscriptions

30-day returns

Hassle-free returns if it is not the right fit

Hindgut ulcer support FAQ

Clear answers for horse owners
Is G-Tract a treatment for ulcers?
Who is this a good fit for?
Where can I find sizes, feeding directions, and ingredients?
Can I use G-Tract with other ImmuBiome formulas?
When should I choose Super Concentrate instead?
How do I get started?

G-Tract reviews from horse owners

Real feedback on everyday digestive support
HorseProductHorsesSupplementG-tractBodyBunchGeldingGut supplementStuff
  • 5 stars: 727 (94%)
  • 4 stars: 42 (5%)
  • 3 stars: 4 (1%)
  • 2 stars: 1 (0%)
  • 1 star: 1 (0%)
K
Kat T. (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Other
What is your horses age?: 8 to 12
Leaky Gut

My gypsy Vanner has what my trainer says is leaky gut. I bought this and as soon as I started the two scoops she seemed to improve. But now it looks like it’s back full force so I’m not sure what to do. I may have to call the vet.

S
Sara C. (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Other
What is your horses age?: 13 to 20

Awesome stuff. My dsld mare gets Bute every other day and this seems to help her gut stay healthy

C
ChrisH (Canada)
What is your horses estimated workload?: Medium
What is your horses discipline?: Show Jumper
What is your horses age?: 8 to 12
Our horses thrive on G-tract!

Our horses thrive on G-tract! Both our warmbloods are on G-tract and they thrive with this supplement!

N
Neeley W. (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Other
What is your horses age?: 1 to 3
G-Trac It Works!

Have a 6 month old fill on this 4 months who had lived with water stool syndrome from antibiotics treatment at a day old. Finally real stools. Yay! It works!

B
Brenda W. (Canada)
What is your horses estimated workload?: Medium
What is your horses discipline?: Dressage
What is your horses age?: 8 to 12
Penny's journey with ulcers

Hi my horse had chronic glandular ulcers after rehab and also 3 times on antibiotics. After two years of unsuccessful recoveries I decided to ditch the gastroguard which was costing me $1500 month (Canada) and invest in other things to fix her microbiome. I found a vet that would prescribe misoprostal and I purchased G-Tract and also Rite trac from Kentucky Equine Research. I also bought drug store purchased Nexium which didn't work by itself in the past. This time I saw results ! After 3 years of dealing with ulcers I finally got the right balance. Immunubiome is now being fed as maintenance and we are back in a great training program. I couldn't be happier. Incidentally I am waiting on the results of a study I participated in on microbiome testing on horses here in Canada that have had chronic ulcers.

C
Caitlin C. (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Western
What is your horses age?: 4 to 7
My horse’s health is back on track

I’ve been using the G-Tract supplement for over 6 months now and it has been a lifesaver for my horse. He has had a bunch of health issues over the last year. One of the toughest symptoms we were battling was fecal water syndrome. My vet recommended I find a probiotic supplement with Saccharomyces in it. That led me to this supplement. My horse hasn’t had any gut issues since. It is very clear he is feeling so much better. My horse is also on EPM treatment at the moment, which can be very hard on their guts. This supplement has really helped prevent any gut related side effects.

B
Becca (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Hunter Jumper
What is your horses age?: 21+
Nothing else worked …

My beloved senior gelding has had gut issues since getting Lyme disease a decade ago. Undiagnosed for 2.5 years, and many stressful barn moves later, his gut was never right. I tried everything under the sun and nothing would relieve his chronic gas, which was so painful he couldn’t be ridden faster than a walk. This combined with Lean Muscle gave him the comfort he needed - at least during the non-grass seasons. This Spring, he was suffering again when the pasture came in; turns out he now has PPID, just started treatment, and is uncomfortable in his gut again. We’ll see what happens once his new meds help his decreased ability to absorb nutrients … hopeful this will continue to work and grateful to be heading into no-pasture seasons!!

L
Lisa (United States)
What is your horses estimated workload?: Heavy
What is your horses discipline?: Dressage
What is your horses age?: 8 to 12
Ziggy

Ive noticed a big difference in My horses nervousness. he's not spooking like he was. more trusting and willing. Ive never noticed a change with any other supplement I had given him, I was just hoped they were helping.

A
Anonymous (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Other
What is your horses age?: 13 to 20
Healthy Horse

Immunize G-Tract has been part of my horse’s supplement recipe for a couple of years now. He has been looking and moving better than ever.

M
Maria D. (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Dressage
What is your horses age?: 13 to 20
Probiotic gem!

My mare is struggling with chronic Lyme and we started her in your probiotic a few weeks ago to boost her immune system via her gut health. We were thrilled to discover your product because it is all-inclusive as well as free of fillers and sweeteners. She is severely insulin resistant and yours is the only pure product. She is also a supremely picky eater, but licks every bit of this yummy powder from her feed tub. Thank you so much for creating this product.

E
Ellen S. (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Dressage
What is your horses age?: 8 to 12
OUTSTANDING!

For my sweet, 10-year-old Oldenburg gelding, Wingman, this product has been a game-changer! He is a very picky eater and every saccharomyces supplement I have tried to feed him has been received with a two-hooves-down. Then I found Immu-Biome! He eats it and more importantly, I love how it is helping his sensitive tummy!

S
Stephanie B.
What is your horses estimated workload?: Heavy
What is your horses discipline?: Show Jumper
What is your horses age?: 13 to 20
Amazing

My mare has had basically chronic stomach ulcers. We treated them and I wanted to put her on a supplement to help keep them away. Since being on this supplement for a few months now, she has been SO happy and her body overall has never looked better!!!

G
Gayanne G. (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Other
What is your horses age?: 13 to 20
Love this!

While it wasn’t confirmed my OTTB had ulcers, he has had them before and displayed the same symptoms. When he stopped eating his grain I knew. Immubione was recommended and within 3 weeks he was much happier! I now use it for maintenance. Interestingly he didn’t like the taste so I put some honey on for a few days. After about a week he still wasn’t really eating much of his grain yet but would eat all the grain that had the Immubiome. It was like he knew it was helping! At that point it was molasses free.

R
Rose (Canada)
What is your horses estimated workload?: Medium
What is your horses discipline?: Dressage
What is your horses age?: 8 to 12
Early results

It’s been less than a month but already my gelding seems more energetic, his appetite is improved and he is happy to work.

K
Kate S. (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Dressage
What is your horses age?: 13 to 20
Only the Best for my horse

I love my horse and only want the finest ingredients going into his body. He gives 100+% to me and I give it right back.

L
Lori D. (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Western
What is your horses age?: 1 to 3
Best Ulcer Supplement out there

I was looking for an ulcer supplement. I had tried a bunch that didn’t work. I tried the G Tract and love it. It works great. Very affordable

A
Angie F. (United States)
What is your horses estimated workload?: Heavy
What is your horses discipline?: Hunter Jumper
What is your horses age?: 4 to 7
Seems to be working!

My horse has chronic bleeding ulcers and I’ve tried every gastric supplement on the market with no luck. This supplement seems to be doing the trick!

C
Charlotte N. (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Other
What is your horses age?: 21+
Improved gut health

My 24 year old horse had eaten some hay that had powdery mildew that we didn't notice at first because the hay went bad while in storage in a barn that was not ventilated very well during the summer months. My horse's diarrhea was pretty bad and I had already tried other remedies such as kaolin and a particular kibble supplement meant to improve gut health. I decided to try ImmuBiome G-Tract, even though it costs quite a bit. I saw improvements after I used it after 3 to 4 weeks (we had already replaced all the hay to some good quality hay). After 2 months, his upset GI tract was completely normal and continues to be so. I continue to use it because it maintains my horse's health by adding healthy natural supplements to his diet. He is all around healthier due to this supplement.

K
Kellie (United States)
What is your horses estimated workload?: Heavy
What is your horses discipline?: Hunter Jumper
What is your horses age?: 8 to 12
Nothing else worked!

Using this on a horse who tends to have skin issues and get cellulitis. Since staring 1 month ago, his skin issues are resolving and no cellulitis again, despite lots of snow and mud. Very happy!!

See all G-Tract reviews

Ready for everyday hindgut ulcer support?

Start with G-Tract for focused ulcer support—or compare Super Concentrate for broader daily microbiome care.

Shop G-Tract

Shop G-Tract

Everyday gut comfort support

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