Best-Flex HA®

Deborah - 19/01/2026 18:23

I’ve tried every joint supplement on the market for our 15 year old cob and Best Flex is by far the only one that I’ve actually noticed a difference!
Amigo is forward and enthusiast again during his work and rides out.
I highly recommend this product and will be putting my other horses on it too 😊

Gillian - 18/01/2026 22:30

Always delivered in good time and well packed.
Product appears to be helping my 25 year old home bred Cleveland Bay x TB horse together with his regular physio therapy treatment with Tecartherapy to his hocks and SIJ . To continue to compete side saddle , including dressage up to and including elementary level and 60cm jumping.
He’s is NOT on Bute or any other similar products and has never had any of his joints operated on or injected into . No invasive treatment at all .

Guest - 18/01/2026 16:56

I've used Bestflex on my Irish cross Selle Francis mare since she was in her teens for preventative joint support. She's now 22 fit and healthy, going strong without issues. Still loves to pop a fence. Bestflex, balanced diet and consistent careful training have all contributed to her well being.

Jacqui - 17/01/2026 11:17

Great stuff, horse eats it with no problem so obviously very palatable and feels fab jumping!

Guest - 17/01/2026 09:00

Only been using this product for a couple of weeks but already my 18 year old gelding feels more comfortable and less stiff in his hind legs, so I have high hopes for more improvement 🤞

Guest - 16/01/2026 19:10

An absolute game changer. My Vet told me to get him on a good joint supplement and recommended Bestflex. I tried cheaper options and his symptoms returned so went back to BF and he’s back to his cheeky healthy self. Hacking out, Pole sessions and Fun rides!

Guest - 16/01/2026 18:37

My mare is 14 , she is stiff in the morning but due to Best Flex she is now very supple and easy to work . We show her and could not do that without Best Flex

Guest - 16/01/2026 18:05

Great Product, horse wouldnt be without it

Rachel - 16/01/2026 15:08

It seems to make a difference and very palatable

Guest - 16/01/2026 09:53

I have used Best flex HA for many years and wouldn’t be without it. I did stop it for about 5 months, but they seemed stiffer. Both are back on it now.

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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!