Best-Flex HA®

Rachel - 11/07/2025 22:51

My horse and I would be lost without best flex,this product helps him to keep moving and use himself properly.
We have used this product for years,I cannot recommend it enough.
Professional company that really delivers,thank you!

Guest - 11/07/2025 19:37

My horse is 24 with arthritis in both front coffin joints. It’s early days but Best Flex HA seems to be helping

Vicki - 11/07/2025 15:01

Only been using it for a short while but can see a difference already

Guest - 10/07/2025 10:01

We have two older horses who have been on Best Flex for several years now (25 & 30 years old) and they both improved so much when we started the Best Flex and the 25-year old is still in regular work and moving well. The 30-year old has now retired but not due to mobility issues. He still enjoys the odd canter around the field!

Guest - 10/07/2025 07:32

My horse has been through an incredibly tough journey over the last 3–4 years. It started with injuries to his check ligament and both superficial and deep digital flexor tendons in his hind legs. After 8 months of box rest, we began bringing him back into work, but as soon as we started trotting, it was clear something still wasn’t right.

A bone scan revealed arthritis in his C3–C5 vertebrae, fetlock arthritis, and sacroiliac (SI) changes. Not long after, he was also diagnosed with navicular disease and later, kissing spine. At one point, the prognosis was guarded — I was told I might never ride him again.

Desperate to give him every chance, I spent hours researching joint supplements and eventually decided to try Best Flex HA. Alongside veterinary care, rehab, injections, and surgery over the course of three years, I truly believe this supplement played a major role in his recovery.

Now, against all odds, I’m back in the saddle with my vet’s blessing — and my horse is sound and winning dressage competitions! He’s a true comeback king, and I’m convinced Best Flex has helped keep him moving comfortably.

He continues on this supplement daily, and I recommend it to everyone I know. It has made a world of difference for us.

Guest - 09/07/2025 19:52

I absolutely love Best flex HA . It has everything in it to help my boy and his hocks that are lacking in cartilage. He's hand a marked improvement all round in his gait movement , hes only 11 and he has fantastic confirmation but the hicks became sn issue when he got stuck being brought over from spsin in Brexit and then covid. He was damaged by the highly paid professional rider to keep him going gir what we hoped would be a short 4-6 weeks but she got pregnant and her much bigger husband unbeknownst to us rode him causing terrible damage to his hocks. With an operation and two years complete rest with best flex and my light weight hes doing absolutely amazingly. Hes 100 % sound. I'll be keeping him on it until anything changes but I fid my home work and I do believe it is probably the best joint supplement on the market. Ive done a lot of research over many years and id rate thus as excellent. Proofs in the pudding.

Alison - 09/07/2025 14:54

Very satisfied with Best-Flex HA. Secure in the knowledge that my horse is getting all the essential and evidence based supplementation to aid his joints and help prevent further wear and tear. Would highly recommend. The best thing is that they do a low plastic, paper refill bag so not needing a plastic tub every time!

Hayley - 09/07/2025 13:12

My mare has been on best flex for a month now and I've seen a huge improvement in mobility due to her having ringbone. I made the switch from flexamine to best flex just to trial something different as she was on the flexamine for quite some time and I'm so glad I made the change

Julie - 09/07/2025 06:30

My horse has improved immensely he has now been on this supplement for over six months so I will keep purchasing.

Lynne - 08/07/2025 21:56

26 year old Arab mare...ex endurance has been on Best Flex for 2 years.
I ran out.....there was a marked deterioration in her comfort /soundness.

Back on now and marked improvement shown.

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Nutrition Information

Maintaining joint health is essential for all horses, particularly those in regular work, older horses, or those competing at high levels. Exercise and the natural aging process can put strain on the joints, making high-quality joint nutraceuticals a valuable addition to support your horse's mobility, flexibility, and overall comfort.

Repetitive concussive forces on the joints are a leading cause of joint wear, contributing to cartilage degradation and synovial membrane irritation. This can trigger an inflammatory response, which, if excessive, may overwhelm the body’s natural repair mechanisms, potentially leading to long-term joint issues.

Best-Flex HA is a scientifically formulated equine joint supplement designed to provide comprehensive joint support. It contains high levels of Glucosamine HCl, Chondroitin Sulphate, and Hyaluronic Acid (HA) - key nutrients that help maintain cartilage integrity and support synovial fluid. MSM is included for its role in supporting tissue elasticity and overall joint function. Additionally, Boswellia offers natural soothing properties, while Omega-3 polyunsaturated fatty acids support a normal inflammatory response. Vitamin C contributes antioxidant benefits, helping to maintain the neutralisation of free radicals and support joint tissues.

By delivering these essential nutrients in an optimal balance, Best-Flex HA® helps maintain joint structure, flexibility, and long-term mobility. Continued daily use throughout your horse’s active career ensures a steady supply of fundamental joint nutrients to support flexibility and performance. For veteran or retired horses, Best-Flex HA® helps soothe the joints and supports ease of movement. It is also safe to feed at increased levels and over extended periods of time for horses that may require additional support.

Micronutrient Analysis

Active Ingredients	Per 3 scoops:
Glucosamine HCl	18000 mg
Chondroitin sulphate	6500 mg
MSM (Methyl sulphonyl methane)	18000 mg
Hyaluronic acid (Sodium hyaluronate)	1100 mg
Vitamin C	11000 mg
Omega-3 fatty acids	11000 mg
Boswellia	12000 mg

Composition

Micronised linseed, Glucosamine HCl (vegetarian), Methyl sulphonyl methane (MSM), Boswellia, Linseed oil, Chondroitin sulphate (90%, low molecular weight), Sodium hyaluronate (HA).

Additives

Vitamins	Additive number	per kg
Ascorbic acid	3a300	122g

Analytical

Moisture	21.5%
Crude protein	14.0%
Crude oils & fats	14.8%
Crude fibre	5.6%
Crude ash	2.2%
Sodium	0.5%

*Based on publicised maintenance rates for active ingredients for a 500kg horse. Correct at time of release.

Feeding Guide

Body weight	Amount per day
Up to 250kg	1 Scoops
250kg - 400kg	2 Scoops
400kg - 600kg	3 Scoops
Over 600kg	4 Scoops

1 scoop (50ml) of Best-Flex HA® weighs approximately 35g.

Feed the recommended level, or as recommended by your veterinary surgeon.

The daily feeding rate can be adjusted based on your horse’s work load, age and mobility, to suit their long term daily requirements. Before and during a period of hard exercise, the daily levels can be increased to the next scoop level to provide extra joint support and may be continued on a long term basis for superior joint health support.

Best-Flex HA® is a complementary feeding stuff for equine animals. Feedmark uses nothing in the formulation of this product that contravenes FEI competition rules.

Learn more about competing within the rules by clicking here.

Does my horse require a joint supplement?

The #1 question we are asked as people find out that almost everyone on their yard is feeding joint supplements! For older horses, or horses in regular or hard work, the articular cartilage degrades, reducing joint movement and compromising mobility. Best-Flex HA® provides the highest levels of joint supporting ingredients available on the market to help maintain normal joint function. 

Is Best-Flex HA® the best joint supplement for veteran horses?

Yes, Best-Flex HA® is ideal for elderly horses, as it supports joint mobility and helps them maintain an active lifestyle.

Do I need to feed a loading rate of Best-Flex HA®? 

No, we believe that any changes to your horse’s diet should be made gradually for optimal digestive health. Therefore, slowly introduce Best-Flex HA® to your horse’s feed until you reach the recommended feeding rate.  

What is the difference between Best-Flex HA® and Extra- Flex HA®?

Best-Flex HA® is our highest specification joint supplement, and therefore contains higher levels of joint supporting ingredients when compared to Extra-Flex HA. Best-Flex HA® also contains Boswellia to provide anti-inflammatory support.

Can horses and ponies with laminitis or metabolic issues have Best-Flex HA®?

Yes such horses and ponies can have Best-Flex HA® as there is nothing in its formulation that will cause an issue for them. 

Can I feed Best-Flex HA® to my young horse or is it just for older horses?

Yes, this joint supplement contains ingredients that support joint, ligament, tendon and cartilage formation, which horses of all ages and workloads will benefit from.

Can Best-Flex HA® be fed to horses that are competing?

Feedmark uses nothing in the formulation of this product that contravenes FEI competition rules.

Does Best-Flex HA® support a normal inflammatory pathway?

Yes, Boswellia is included in Best-Flex HA® as the Boswellic acids support horse’s normal inflammatory pathways and maintain joint comfort.

Probably the world’s best horse joint supplement - read the reviews!