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Best-Flex HA®

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

2152 reviews. 4.9 / 5
  • Reviews
  • Technical
  • Feeding Guide
  • FAQs
Guest - 01/07/2025 20:07
My old boy feels more free in movments
Guest - 01/07/2025 19:42
I’ve been using Best-Flex HA for a couple of years and have found it to be very effective.  I’ve also recommended this product to friends.
The order process is quick and simple and the products/ items ordered are usually with you in a few days.
Guest - 01/07/2025 07:05
My arthritic veteran has been on this for several years now and it keeps him comfortable. He can be a fussy eater too and he absolutely gobbles this up. Great product.
Guest - 30/06/2025 21:47
My horse suffers with severe arthritis and is quite stiff at times, this supplement has given her a new lease of life again she’s back running around in the field and a lot more comfortable
Mary - 30/06/2025 21:42
Delighted with how much it helps Alfie.  He is now retired and 32 years old but looks much younger
Guest - 30/06/2025 21:15
It made my horse feel young and strong again
Guest - 30/06/2025 12:50
I've fed Best Flex HA for many years, I'm convinced that it played a big part in keeping my arthritic horse active until he was 32
Guest - 30/06/2025 11:30
Fab stuff. Both my older horses are on it.
F - 29/06/2025 21:55
A very good joint supplement that keeps my horse very comfort and able to conti me with his exercise regime
ALLISON - 29/06/2025 08:48
I feed Best Flex to a couple of my older riding school horses as I believe it's the best supplement that actually gives results , it is great for their joints and they both move freely-I will certainly be keeping them on it.

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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.