Osteo-MAX
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Osteo-MAX is a 3-in-1 liquid equine supplement formulated to support bone density, joint mobility, and connective tissue health in horses of all ages and disciplines.
Key Benefits
- Supports healthy bone density and mineralization
- Promotes joint comfort and mobility
- Aids connective tissue repair and collagen synthesis
- Highly bioavailable liquid formula — up to 98% absorption vs. 3–30% for powders
- Palatable; horses consume readily top-dressed on feed
Key Ingredients
- Orthosilicic Acid (OSA) — supports collagen synthesis and bone formation
- Hyaluronic Acid (HA) — supports joint fluid viscosity and soft tissue hydration
- Vitamin K2 (MK-7) — directs calcium to bones; supports cardiovascular health
Who It's For
Performance horses, senior horses, young growing horses, and any horse requiring targeted bone, joint, and connective tissue support.
Directions for Use
Top-dress the recommended daily serving onto your horse's feed. Shake well before use. See product label for feeding guidelines by weight.
Backed by Science
- Mandotori, D. (2021) — Vitamin K2's dual role in bone health and vascular calcification
- Reffitt, D.M. et al. (2003) — Orthosilicic acid stimulates collagen type I synthesis and osteoblast differentiation
- Zhou, H. et al. (2019) — Orthosilicic acid accelerates bone formation
- Neuenschwander, H.M. et al. (2019) — Hyaluronic acid deficiency in equine joint disease
Manufactured by 100X Equine, LLC in the USA. Chief Veterinary Officer: Dr. Russ Peterson, DVM, MS, DACVSMR.
Available Sizes
1 Gallon (OM100) · 2 Gallons (OM200) · 4 Gallons (OM400)
Denise M.
This is Hobbysgun Thief aka Gunner my 31 year retired reining horse. Reserve World Champion ❤️Thanks to Osteomax he is still cruising down the trail and enjoys grazing in the pasture pain free. This picture was taken June 1 2026.
We started him on Osteomax 2 years ago because he had a clicking sound in his hips. Normal arthritis but we wanted to give him as much comfort as possible.
June 10th he will be 31 years old.
Sharon L.
This is a fantastic product! My horse loves the taste. I take it myself also. I can tell on myself that it really helps with inflammation!!!
Linda G.
It’s really great.Help my mini a lot . He had fonder and it helped a lot.
Linda T.
Osteomax has been helpful for my two horses, 18 and20. The owner of the barn has an older horse and has started using the product as well, and likes it very much.
Kim R.
Best products! Love the barn pricing and how fast it comes
Ralph R.
Not just for the older horses out there. Keeps my youngster free of issues and happy to go to work!
Hannah S.
My horse has been on Osteomax since shortly after I purchased him almost three years ago when he showed signs of starting very stiff, especially over his back. He is big (over 17h) and has had a long, demanding career. I firmly believe Osteomax has kept him off a regular dose of NSAIDs. He feels great every day, successfully competes on the A-circuit adult hunters, and everyone is always shocked to hear he's 17.
Judy J.
About six months ago, my three year-old old schnauzer got injured playing with her whippit, brother. We gave it plenty of time to heal, and she always wouldn’t end up with a limp. I decided to try her on Osteo and she has not lent another day ever since and her brother has tackled her numerous times.
Steve F.
Great soft tissue helper!
Kelli
My 28 year old horse is out running around like hes 10 again. I love this product
Cindi K.
Good products.
Billie Jo S.
28 yrs old keeps him ostio keeps him moving! Love this product!
Maison M.
I use both osteo max and max calm and I can’t say enough good about these products! Osteo max keeps us feeling good on the long summer runs. I use max calm on my horses who tend to get nervous when I’m hauling and I can truly say I have felt a significant difference in them. Even when riding at home, they are so much calmer. I love these products!
Julaine S.
Duke seems to move better when he has this mixed in his feed.
Ashley N.
I have seen significant change with his overall comfort and he is able to move more freely and confidently!
Joey H.
Been using the Osteomax for several months and have noticed a huge improvement in my horses movement. Has been much happier running a pattern and has not been stiff before or after a workout
Damon G.
We started using Ostio-max for our labs, and the results have been remarkable. We highly recommend.
Kelsey L.
I love feeding osteo-max to my yearling! It’s a great product that I plan to use with all mine
Niki O.
Keeps our 25 year old gelding looking and feeling great !
Elizabeth H.
My horse has decreased his tripping/stumbling significantly!
Heather
Wonderful product!
Sydney B.
Love this product!
Laura R.
Keeps all our show horses feeling great!
Cathy S.
Osteomax is a standard item in my feed room. I have a 4 year old gelding on it to continue good bone and muscle tissue during training. I have a mule on it to support tendon strength in her rear hock. She had been sent to be a pasture pet. She is now 10 years old and out on Missouri trails! Lastly my 26 year old mustang who recently was diagnosed with Cushing is now regaining!
This product is amazing!
Wanda T.
I started my 20 year old horse on osteo max about a year ago, he was struggling to stay sound from a torn suspensory. Since then he hasn’t had any problems, now I’m also giving him gut x.
Thank you 100xequine
Rhondie J.
This has really helped our old horse enjoy his life more comfortably since we began using it!
Jea H.
I noticed my Morgan gelding was showing stiffness especially in the right hind back in 2020. The vet recommended Pentasan and I used that for about 2 years. It helped, but it was no longer available. I tried Osteo Max in April of 2023 and he has been on it faithfully since then. It is so much better than the Pentasan and he shows no signs of stiffness or arthritis. He will be 30 years old in June and we still ride the trails. Osteo Max is absolutely the best!
Susan S.
Flynn was diagnosed with navicular at 6 yrs old .. he isn’t sound to ride but he IS field sound and most important he is comfortable. I truly believe that Osteo-max is a big part of that reason!! Thank you for this product!
Lisa W.
Great products!
Donna C.
My horse was giving on front leg then back leg. Had vet out she could find nothing. I tried supplements for arthritis but that didn’t help either. I saw Osteo Max on FB and thought why not I’ll give it a try. I have used this since last fall and it’s now May. No issues with his legs. I will always use this product. Still don’t know what caused these issues but Osteo Max fixed it!
Linda N.
I have used Osteo Max for a few years, now. When I first bought my gelding, he was under weight, his hair looked bad & he just didn’t look filled out. Within the first month, he began to blossom. His hair began to shine and shed. His weight improved tremendously and he began to fill out. He started to show more Stamina and feel better. He started to run and play. It also helped his performance overall. I started him on it on day one. If it’s my power, I will never be without it and will use it on all my horses from day one. It’s a wonder supplement!!! Wished I had it many many years ago. I tell everyone about it.
Linda & MoJo thank 100X Equine
David
We bought this 20 yr old gelding, former rope horse that had been turned out to pasture. We saw his potential to return to his glory days and turned to Osteo Max. Pictures are from the day we got him and then 3 weeks later on Osteo Max and lots of long trotting and backing. Third picture is at 5 weeks, color is different due to a door lighting. It’s great to find a product that really works and doesn’t hype them up.
Callie D.
I love Osteo-Max!! It keeps my mare running amazingly, and she enjoys it more than the grain or the cubes I feed it with!
Mary M.
18 year old Tennessee Walker moves great and looks great.
Tanya
Osteo max keeps our older horse feeling his best. The customer service is excellent.
Nina W.
Love ❤️ it saved my mare
Patricia
Fast service. Product delivered quickly.
Wendy H.
My mare has kissing spine and my vet highly recommended the Osteomax..she’s remained sound since being on this..love it
Pam J.
This mare ( VF Royal Money) is 27yrs old. She has a bum knee and some arthritis ... started her on your product and she gets around so much better. Our land is very hilly and she has stayed comfortable.
UNDERWOOD ACRES
Kris T.
Love the products been using them for years!!
KRISTINA N.
I have used the product for my dogs and Horses for a long time
Tracy J.
This product is amazing. I started my older mare who was having lamness issues behind on and off for a couple years. She was on the product for less than two weeks and the Lameness issues are gone and she is back to doing light lessons.
Jackie T.
The first two pictures are of our 25 + year old gelding. He was looking quite rough last fall. We started using Osteo-MAX and continued using it all fall, winter & spring. Our gelding did well during this time and even gained weight! We are very pleased with this product!!
Carla R.
One of my mares has osteoarthritis really bad in her right stifle. It has definitely helped her movement. Although she is not sound enough for competition, the product has really helped her to be pasture sound. Also, her coat is so shiny!
Diane S.
My mare is 32 and has been on Osteo-Max for 2 years. She looks great for her age. She gets one pump a day. Sometimes I giver 2 pumps. My other horse , her 28 yr old son is also on Osteo-Max. Great stuff !
Laura P.
I started adding Osteomax in February. Did not see a huge change. I decided to try Osteoflex and the improvement was amazing. My horse has ring bone in his right front and arthritis in his left knee. We took him to the vet in January and the vet told us there was nothing we could do. My horse ended up with an abscess that had been there, who knows how long, before it blew. The vet was floored like we were. My horse still can’t run but he is walking much easier. My farrier used the normal size hoof jack for the first time in almost 20 weeks. My horse has been companion only since shortly after we brought him home, due to the ring bone. His life and health are more important than riding him. My other horse would be beside himself if we lost him, too.
Taylor S.
I started using the osteomax on my 12 year old dog about a year ago and the results are unmatched. He grows annoying, fatty, benign tumors that can’t be removed due to a heart condition that doesn’t allow going under for surgery. Since using this product his tumors have shrunk to half the size and he’s so much more comfortable. On top of that great result, he’s much more active and his arthritis doesn’t bother him half of what it used to.
kassandra w.
I’ve been given this to my Horses, and my pregnant Mare. She was a maiden. Mare had the filly in an hour and a half. Filly latched on in three minutes was healthy and strong.
Ally M.
Seems to be helping my gelding with OCD and arthritis.
Shelly D.
So im seeing good results with this product
Mary M.
The Osteo-Max has helped me keep my 24-year-old retired show hunter in comfortable shape. Very pleased with the benefits of this product. It's a joy to see him out cantering around with his buddies in the pasture.
Kat H.
☀️
Stephanie C.
I've had my two guys on Osteo-Max since Sept 2025.
My grey has had issues with general on and off lameness for 2-3 years. This is the first year he hasn't gone lame! He's definitely more active, not hesitant to walk, trot- even run around- which he hasn't felt like doing since he kept coming lame.
And they love it, which helps so much.
Teresa D.
Great product! Improved my mares movements a lot. Highly recommended.
Abbie M.
My 23 y/o mare with chronic osteoarthritis has made a complete 180 with this product! Her stiffness has almost completely subsided, and we have been able to discontinue joint injections since beginning this product. She has worked better this season since starting OsteoMax than she has in years! Very pleased with this product and rep assistance!
Melissa S.
Using this on 3 older horses and have seen a difference in each of them
Nancy W.
Our THW girl, Ribbon, has been on OsteoMax for several years now, for hoof support after an injury. It certainly helps her maintain hoof integrity.
Judy C.
I've been using Osteo-Max and Gut X for approximately 3 years now. It's been a great supplement to our feeding program. My horse had a DDFT and Navicular issue and instead of being a pasture ornament, I still ride and enjoy him. Also have a horse prone to colic and using Gut X has greatly helped prevent those episodes. All are great products and I highly recommend!
Leslie B.
My horse has been on this since she was 2. She's now 4 and I think it's really helped her while growing and through training.
Denise G.
My horse loves this stuff, hopefully I will see good results.
Margaret W.
Since having an unexplained knee injury, 2 yrs ago, we put him on 100x, and he is moving much more comfortably and we are cantering again.
Jennine B.
Osteo-Max added to daily feed and allergy treatment has really helped improve my 20 yr old mare mules allergy symptoms.
Vicky B.
I’ve been using the Osteomax for quite a while now . It’s keeping my old guy comfortable. Thanks for a great product.
Abby W.
Absolutely loving Osteo-MAX for my horse. Since starting it, I’ve noticed a difference in comfort, movement, and overall recovery after rides. I really appreciate that it supports not only joints, but also bones, tendons, and ligaments — which is so important for performance horses. Always thankful to have products I trust to help keep my horses feeling their best!
Lindsay W.
30 days on Osteomax and i have already seen a huge difference! Chief has had issue for a while and was just diagnosed with navicular caudal heel pain July 2025. He has been on firocoxib which we have recently discontinued and i have noticed that Osteomax has done the same if not more than the firocoxib. He is 21 with a lot of life to live i am so happy osteomax has given his quality of life a boost. I am looking forward to seeing more benefits the longer we continue osteomax!
Kathleen R.
Oliver has struggled with joint issues for a very long time…. This seems to definitely be part of the long term solution…. A great product!!!!
Wendy
My veterinarian highly recommended the OsteoMax for my mare with kissing spine..she has made a 180 on this product!! Love it!
Jenna S.
While I was away at college and my horse (he’s 25) was being cared for he started to lose muscle suddenly and started to baby his hind end because his hocks and joints were so inflamed. So when I moved home I started talking to people and my one friend used 100xequine gut for her horse and since my horse had such bad osteoarthritis I decided to try it even though it was expensive I thought I might be worth it. And it is! Before going on it walking him to the barn he was limping so bad and would barely put pressure on his back legs and his hocks were so inflamed I couldn’t even fit my hand around them and he wouldn’t let me touch them. He didn’t want to go on his evening walks anymore and I was getting really scared that nothing would help. With osteomax I have seen such a huge improve as I also have therapy (ceramic heat) hock wraps from Schneider’s which have been helping to. I have seen him gain muscle back and I’ve even seen him cantering around his pasture the other day and we are even back to going on our walks. So this is definitely worth the money for him to see such a huge improvement from what we were at.
Kim A.
I’ve used the Osteo Max for probably five to 6 years and love it.
Miranda B.
My boy is 22 years old and he’s been moving so much better on the osteomax! Love it!
Shelly V.
We have two retired standardbreds, one off the track retired. He has had two severe injuries and osteo max has helped greatly. He acts like an 2 year old in the field. Our other one has had a tendon injury and this has also helped.
Nicole T.
Aurora went from barely tolerating her hind legs being handled to running barrels! After only four weeks of using OsteoMax, our farrier commented on how much easier it was to do her hooves because she could lift her hind legs with no issues and she didn’t even know we’d started OsteoMax. Our veterinarian and farrier are both beyond impressed with the improvements with Aurora’s legs. We’re thrilled.
melanie h.
This stuff rocks! My mare is 22 and has bad arthritis, she feels so much better on the osteo max! I have every one of my horses on this stuff for different reasons and they all have started to feel better!
tama e.
Horses are moving much better
Melanie J.
Recently started my 12 yr old horse back on this product. He has some naturally occurring, age and work related arthritis that is causing him soreness now that he’s back in regular work. Hoping to see the same results in this guy as I saw in my 30 yr old horse.
Dianne E.
About 4 years ago, my beloved registered paint mare, Rayne, go a suspensory ligament injury to her left front leg. My vet said she wou ld need a year old. During her down year, we bred her and rested her. She started on Osteomax at this point. She had a lovely filly and was sound after her delivery. Now she is on a daily dose of Osteomax and trail rides all around Prescott National Forest ans at 20 is learning how to drive. Without Osteomax, I wouldn't be having so much fun with her. Many thanks Osteomax.
Kelly S.
My old arthritic horse moves better, yeah!
Shannon B.
Absolutely love how my older horses respond to the osteo max. Keeps them running comfortably
Cathy H.
My horses had been on this for years. I started using it on 2 more older horses.
Nancy C.
My horse got Carpitis in his knee And was no longer able to compete. He was quite lame and not even rideable. I started him on two pumps of OSTEO-MAX and he slowly got better. By the end of four weeks he was back to looking sound so he is now on one pump a day.
Madasyn H.
My mare loves the Osteomax for her hock arthritis!
Sharon H.
great product, has really helped my senior horse's arthritic knee.
Robin
My 24 year-old Friesian, Orion, is a retired Grand Prix dressage horse, and getting older, so has been on joint support supplements for a while. This winter he was playing and suffered a pulled stifle muscle. We started him on Osteo-Max and he recovered beautifully. We were surprised to see his coat is shiny, his muscle tone is improved and he’s very energetic. We stopped his other supplements and will continue with the Osteo-Max for his continued joint and muscle health. Strongly recommend.
Gina L.
Been using OsteoMax for 3 years now. Horse loves it, injections last longer, and he seems comfortable. This will continue to be a staple in my feed room!
Vicki D.
I raised this filly. Ever since weaning she had a slight limp off and on. Last summer as a 2 year old I started working her on the longe line and after a couple of days she was slightly lame. I had my vet x-ray her. He found 2 faint holes in her navicular bone. He called it developmental dysfunction. He offered vey expensive shots that may help her. I declined and put her on Osteo-MAX for 3 months and then turned her out in the pasture until this spring. I started working her again and put her back on the Osteo-Max. I am happy to say she has been sound so far! Here is a video of the first time having a saddle!
JOHN M.
My mare has severe crushed heels and long toes ,though never diagnosed appears to have foundered as a youngster . Osteomax and correct shoeing keep her sound and happily working at FEI level dressage . Osteomax is a real gamechanger .
Kristin E.
Just finishing up our 4th jug of Osteo-Max. 13 year old mare has gone from being "sort of lame" most days to having fantastic days!
Melaney S.
This was the best supplement for my pet mini pig with severe arthritis. He was going on 16 and could barely walk. Within the first few days of giving a full one ounce pump daily he was able to trot around and was much more comfortable. He was happier and able to enjoy life again. I would definitely recommend this supplement for any animal. I even have a couple of cats who come running to get some when adding to my pig’s food.
Heather M.
This horse has a stifle issue. Between regular stifle injections and 2 pumps OsteoMax per day he is sound and able to perform as an open caliber rope horse.
Vickie Lynn G.
I’ve been using osteomax for awhile now when my senior gelding and retired barrel horse started slowing down due to arthritis . This has saved me from chronic steroid injections and he is feeling more comfortable in the show ring now .
Beth H.
I cannot believe the difference Osteo MAX had made on my 22 year old thoroughbred mare. I can tell she feels much better in her movements. My trainer sees it too and has started using it for her horses. thanks for a great product.
Kim J.
All my kids benefit from these products but mostly my Jake who suffers from osteoarthritis.
Stuart R.
We started putting our stallion on Osteo Maxx after a tragic accident at a show. Now his offspring are taking advantage of a great product. The shipping and customer service has been great!
Reyna M.
My horses are more sound, happier and performing better than ever! Thank you!
tama e.
Love this product
Morgan P.
This has helped my senior boys so much definitely won’t run low!
Stephanie R.
Great product! Love the free half gallon. Currently giving this to three horses, ages 5-21, so discounts are greatly appreciated!
Donna B.
We have used 100x Equine products for about 3 years. The Osteo Max is a winner with our horses especially with our clubfooted Missouri Foxtrotter. Proper hoof care with the farrier is important but supplementing daily with OsteoMax is critical to keep our boy sound.
Thank you for your amazing products.
Donna and Opie
Sarah L.
I like it
Dawna S.
My horse that likes nothing loves it
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