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Extra-Flex HA®

High spec horse joint supplement with significant levels of proven ingredients.

422 reviews. 4.9 / 5
Guest - 22/06/2024 09:53
Great product feed it to my boy who has arthritis in his stifles
Guest - 21/06/2024 08:35
Used it a few years ago with another pony it
Kept her going ,  so am now using again with our other pony
Sharon - 20/06/2024 18:52
My Farrier found my horse much easier to shoe after the horse had been on ExtraFlex HA for 3 weeks.
Guest - 19/06/2024 19:57
Great product great price
Carolyn - 19/06/2024 19:18
I have used Extra flex HA for a long time now and fully recommend it to my friends. I received positive results with extra stride and flexibility with my horses after just a short time of using it.
Guest - 18/06/2024 23:16
Good customer service and fast delivery
Guest - 18/06/2024 23:16
Fast delivery
Guest - 18/06/2024 23:15
Seems to work
Denise - 18/06/2024 21:24
I've been using this product for 2 years and it is very successful. My boy wasn't showing any bad signs of stiffness but I believe in prevention so will keep him on it :)
Janice - 18/06/2024 21:21
I have used extra flex for my 17 year old TB for 3 years and would not be without it! She has arthritis and the difference on it is huge!

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Nutrition Information

Glucosamine hydrochloride (HCl) and Chondroitin sulphate are well documented joint health ingredients used by the body to help maintain articular cartilage and joint function. These are complemented by Hyaluronic acid, which works within the joint capsule to support the joint and aid shock absorption, and Methyl sulphonyl methane (MSM), which supplies sulphur that is required to provide strength to articular cartilage and has antioxidant properties which helps to mop up free radicals. In addition to these, a generous helping of Rosehips is included, a powerful natural antioxidant for optimum joint health to help with tired joints, caused by age or wear and tear. These Rosehips provide naturally occurring Vitamin A, C and K to help potentiate the effects of the nutraceuticals, optimising the formation of cartilage and connective tissue. 


Micronutrient Analysis

Per 3 scoops (90g)


30,000 mg

Glucosamine HCl 

12,500 mg

Chondroitin sulphate 

1,000 mg

Hyaluronic acid (HA) as Sodium hyaluronate 

400 mg

Methyl sulphonyl methane (MSM) 

10,000 mg



Rosehips, Micronised linseed, Glucosamine HCl (vegetarian), Methyl sulphonyl methane (MSM), Grass meal, Chondroitin sulphate (90%, low molecular weight), Sodium hyaluronate (HA).



Moisture 16.0%
Crude protein 16.3%
Crude oils & fats 8.8%
Crude fibre 20.2%
Crude ash 3.7%
Acid insoluble ash 4.8%
Sodium 0.4%


Feeding Guide


Weight of Horse/Pony              

Amount per day

Optimum Rate

(increased support including hard work)

Amount per day

Maintenance Rate

(general support)

Up to 250kg 1 ½ scoops ¾ scoop
250kg - 400kg 2 scoops 1 scoop
400kg - 600kg 3 scoops 1 ½ scoops
Over 600kg ½ scoops 2 ¼ scoops

1 level (50ml) scoop of ExtraFlex HA weighs approximately 30g.

ExtraFlex HA is safe to feed long term, and results may take some weeks to become apparent.

Feed supplements should be fed according to body weight. Introduce to the horse's diet gradually, splitting between feeds (when applicable).

ExtraFlex 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