SummitMax Flex

The original injectable Chondroitin 4-Sulfate solution formulated to deliver powerful, drug-free, timed results. Time, inflammation, joint discomfort, old injuries and aging, are not on your animal’s side! SummitMax is designed to impact comfort, performance, joint health, and total body wellness. For small horses and dogs over 100lbs.

Single vial (1 vial = 1 dose)

Always begin with a Starter Series (1 vial every 4 days, for 4 doses).

6-Dose Starter Pack - For first-time users of SummitMax. Includes 6 doses of SummitMax with first order (4 doses for starter series + 2 maintenance doses), all future recurring orders will be for 4 doses at $167.20 (5% subscription discount).



  • Ingredients

    Each 1ml dose of SummitMax Flex contains a 100mg Chondroitin 4-Sulfate sterile solution, and 2mg benzyl alcohol as preservative.

  • How to use

    Always begin with a Starter Series (1 vial every 4 days).

    After Starter Series is completed, maintain by administering one vial every other week OR weekly (for the support of horses or dogs with increased training, recovery, or performance demands).

    Store in a cool, dry place. This product is intended for intramuscular (IM) use only. For horse, administer in the neck. For dog, administer in the back leg. Disposable syringe with needle is included with each vial.


  • Overall Wellness

  • Peak Performance

  • Joint Health

  • Inflammation

  • Senior Care

  • Chronic Discomforts

Summit stories. Summit success.

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"A must-have for performance dogs!"

I compete with my three Bernese Mountain Dogs in many sports, including agility. Summit slays inflammation which not only helps them perform but is great for their overall health. Not only are my dogs on it for maintenance and longevity but I have also added it to my first aid kit in case of injury. Summit has greatly extended the quality of my dogs' lives!

Julie with Berners from Northern VA

"Love, love this product!!"

I have been using it on my now 11 year old Bucking bull! And because of it he is still giving the riders an eight second ride!!

Hou Bear aka "Lady's Man" from Texas

"I had to see it to believe it -- now I am a believer!!!"

After 12 amazing years, my Akita mix was definitely slowing down and had developed a slight limp. After one dose I saw a change, after two doses - I was sold. She has running spurts again!!

Tobey from Clarksville, TN

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What To Expect

Why SummitMax?


soundness + wellbeing

joint pain & stiffness

elasticity / range of motion

injury recovery

less down time

general wear & tear

career longevity

chronic discomforts

peak performance, healthy animals

Simple science. Superior results.

The Benefits of Chondroitin 4-Sulfate

Chondroitin is a natural and necessary component of the body, necessary to healthy development and maintenance of the body’s matrix. At the cellular level, Chondroitin 4-Sulfate has been found to impact:


Natural anti-coagulant effects minimize vascular thrombosis(1)

Recovery & Joint Health

Stimulate synthesis of the components of healthy tissue and cartilage (HA, Proteoglycans) (1)

Inflammation & Discomfort

Anti-oxidant properties reduce destructive enzymes which cause painful damage at the cellular level (Cytokines) (1)


Minimize destruction of the critical components of healthy tissue (Collagen II, Glycosaminoglycans, Proteoglycans) (1)


Promote the fluid retention and hydration necessary for joint lubrication and elasticity(1)

Frequently Asked Questions

  • Is the SummitMax Flex better than the Puresummit Canine product?

    Both canine products contain the same active ingredient of C4S and are effective in promoting joint function, comfort and mobility. Some dog owners are comfortable administering an injection while other prefer the weekly oral protocol.

  • What are the differences between SummitMax Equine, Canine and Flex?

    SummitMax Equine 5ml (200mg of C4S) is for any size horse or large sized mammals. SummitMax Flex 1ml (100mg of C4S) is for large breed dogs exceeding 100lbs and can also be used on mini horses and mid-sized mammals. SummitMax Canine 1ml (80mg C4S) is for canines up to 100lbs.

  • How do I administer the SummitMax Flex injection in my xl dog, pony or other mid-sized animal?

    Click here for a video demonstration. Every package includes detailed
    instructions for administration.

  • What is the Loading Series protocol for SummitMax Flex?

    Your animal will start with one IM (intra-muscular) injection every four days for four doses (16 days) for the Loading Series.

  • What is the maintenance protocol?

    After the Loading Series is completed, maintain by administering one vial every other week OR weekly for the support of animals with increased training, recovery, or performance demands.

  • Are there any negative side effects?

    As with any injection, there is always a slight risk of an injection site reaction. The occurrences of an injection site reaction with Summit has been less than 1 in 10,000. It has not however been tested in pregnant animals.

  • Is SummitMax safe for pregnant animals?

    SummitMax has not been tested in pregnant animals, however, C4S is a naturally occurring substance in the body. As always, it is advised that you consult with your veterinarian before use. 

  • Can SummitMax be given with other medications and/or supplements?

    The product is naturally derived and due to C4S naturally occurring in the body there are no contraindications or negative effects with Summit and any other supplements, drugs, or conditions. However, it is advised by our veterinarian to wait one week after giving Oshpos before your next dose of SummitMax.

  • Do I administer the whole vial?

    Yes. Each vial is a single dose. To ensure sterility, we do not make multi-dose vials of the SummitMax products.

  • What can SummitMax be used for?

    Impacts comfort, athletic performance, mobility, flexibility, recovery, circulation, stamina, and joint health. If a horse has a chip in a joint, typically surgery is needed. Please consult your veterinarian.

  • Why do I have 2 needles with my SummitMax Flex order?

    Specific instructions for each product are included in each package. The SummitMax Flex solution is very concentrated. It is best to draw out the thicker solution with the provided 20-gauge needle. For an xl dog, use the smaller 25-gauge needle for comfort and administer.  For a pony or horse, you may proceed with the 20-gauge needle to administer.

  • Tell me about safety testing for SummitMax.

    SummitMax is made in a sterile lab that meets the strictest requirements
    for product safety. Each batch is tested for sterility by an independent 3rd
    party Testing Facility. Each batch has a unique identification number stamped
    on the bottom of the vial. These independent lab tests are available for you
    and your vet to review. To receive the lab tests for your batch, please email with the batch number off the vial and we will email the
    testing results to you. You can count on Summit Animal Health to protect
    your animals as if they were our own.

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