Best-Flex HA®

Guest - 15/07/2025 20:16

Would never use anything else

Caroline - 14/07/2025 21:22

I've been feeding Best Flex since it first became available. It really helps my 29 year old ex polo pony overcome his stiffness and carry on acting like a nutter!

Rachael - 14/07/2025 21:05

Very palatable and happy with how free she feels

Alison - 14/07/2025 12:06

Great ingredients - best on the market - helping to keep my horse healthy. Highly recommended.

Morgan - 14/07/2025 06:30

I was pretty sceptical at first, I’m not a big supplement feeder and never have been, however with my current horse getting older I decided to start him on Best Flex HA and see how he got on. Compared to the other few joint supplements I’ve tried (it is limited) I can actually say that with this one there has been a very noticeable improvement in him. I did a lot of research online before choosing feedmark, and from what I found this was the best one within my price range and rated very high. I have been really happy with this supplement and the service received from feedmark so I absolutely would recommend it if you’re considering using this product.

Rachael - 13/07/2025 19:29

I have used Best-flex HA for many years and find it a great supplement for our competing horses to help and promote good joint health and mobility.

Helen - 13/07/2025 19:05

Brilliant products, bespoke to all your horses needs. Helpful and friendly service 😌

Guest - 13/07/2025 10:07

Simply the Best

Guest - 13/07/2025 08:11

readily palatable, horse does seem more flexible

Guest - 12/07/2025 21:58

The best joint supplement there is have all my traditional show cobs on it and my dressage horses wouldn’t use anything else!

End of content

No more pages to load

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!