VetriScience GlycoFlex Stage III Ultimate Strength Joint Support Bite-Sized Dog Chews, 120 count
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Clinically Proven GlycoFlex III Hip and Joint Supplement for Dogs represents the third stage of VetriScience Laboratories’ comprehensive joint support program designed to maintain comfort and mobility through all stages of your dog’s life. Recommended by veterinarians for over 30 years, this formula offers higher levels of glucosamine, MSM and perna canaliculus for superior joint care. Glyco Flex III is suggested for active and competitive dogs to maintain top form, but also provides support for dogs showing signs of aging and discomfort as well as those with limited mobility after orthopedic surgery.
Key Benefits- Veterinarian approved canine joint support with perna, glucosamine, MSM, DMG, and antioxidants for advanced joint support
- Recommended for dogs with a maximum need to joint and connective tissue support, joint and connective tissue support, geriatric and working dogs as well as to support normal recovery after orthopedic surgery
- Great for dogs of all weight ranges to maintain comfort and mobility through all stages of your dog’s life
- Clinically proven to increase hind leg strength in dogs by up to 41% in 4 weeks
- Bite-sized soft chews are naturally flavored with real chicken so it’s easy to keep even picky pups healthy
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Item Number57607
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LifestageSenior, Adult, Puppy
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Breed SizeSmall Breeds, Medium Breeds, Large Breeds, All Breeds
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Food FormSupplement
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Product FormSoft Chew
Active Ingredients: (Per 2 Chews) Glucosamine HCl (Shrimp and Crab) (1,000 mg), Methylsulfonylmethane (MSM) (1,000 mg), Perna Canaliculus (Glycomega Brand Green Lipped Mussel) (600 mg), N,N-Dimethylglycine HCl (D mg), (100 mg), Dl-Alpha Tocopheryl Acetate (Vitamin E) (50 Iu), Ascorbic Acid (Vitamin C) (24 mg), Manganese (as Mn Proteinate) (10 mg), Grape Seed Extract (5 mg), L-Glutathione (2 mg), Selenium (as Sodium Selenite) (0.002 mg).
Inactive Ingredients: Brewers Yeast, Canola Oil, Chicken Liver Flavor, Citric Acid, Glycerin, Mixed Tocopherols, Propionic Acid, Proprietary Blend (Maltodextrin, Sodium Alginate and Calcium Sulfate), Rosemary Extract, Silicon Dioxide, Soy Lecithin, Vegetable Oil, Whey (Glycomega Is A Trademark of Aroma New Zealand Ltd.).
Initial feeding period (4 - 6 weeks):
- Up to 30 lbs: 1 chew daily
- 31 - 60 lbs: 2 chews daily
- 61 - 100 lbs: 4 chews daily
- 101 lbs and over: 5 chews daily
Maintenance period:
- Up to 30 lbs: 1 chew every other day
- 31 - 60 lbs: 1 chew daily
- 61 - 100 lbs: 2 chews daily
- 101 lbs and over: 3 chews daily
If giving more than 1 chew daily, divide between morning and evening feedings.
Why should I include vitamins & supplements in my pet’s diet?
Most commercial pet foods include baseline vitamins and nutrients, but some may not have the adequate amount to suit your pet’s exact health needs. Like in humans, vitamins and supplements can help support your pet’s long-term health, regulating everything from digestion to muscle growth. Consult your veterinarian to determine the best vitamins and supplements for your furry friend.
How often should I give this supplement to my pet?
It is recommended to give the suggested dosage based off your pet’s weight. Please refer to the Feeding Instructions tab and consult with your veterinarian for more information.
Is this supplement safe to use with the medication my pet is currently taking?
If your pet has a medical condition and is taking other medication, we recommend consulting with your veterinarian to ensure that this supplement is safe to use.
My pet is allergic to certain ingredients, will this product be safe to use?
For a complete list of ingredients, click on the 'Nutritional Info' tab, next to the 'Description' tab, just under the product photos. If you are unsure about the safety of this product for your pet, we recommend consulting with your veterinarian.
Does this product come in other product forms?
For a complete assortment of products by the manufacturer of this supplement, click on the link next to the item name at the top of the page. You can also find an assortment of supplements across all product forms on our page.

Clinically Proven Joint Support
GlycoFlex gives your dog comprehensive joint support for mobility, flexibility and everyday comfort in the form of a delicious treat that she'll actually want to eat. Available in both tablets and bite-sized chews, GlycoFlex is recommended by veterinarians to provide joint support at every stage of your pet's life.


Formulated to Support a Lifetime of Healthy Joints
GlycoFlex 1 s a great proactive joint supplement for growing and active dogs.
GlycoFlex 2 has higher levels of glucosamine and is recommended for adult or maturing dogs.
GlycoFlex 3 is an extra-strength formula for dogs in need of maximum joint support.
GlycoFlex Classic is an introductory hip and joint health supplement that supports proper joint and connective tissue growth and function in dogs of all ages.
GlycoFlex Plus provides advanced support to help cushion joints, promote cartilage building and alleviate discomfort caused by normal daily activities.
Time-Tested Ingredients
GlycoFlex uses time-tested active ingredients to provide support for joint mobility, flexibility and overall comfort. Perna canaliculus, or green-lipped mussel, is found in every formula to help maintain healthy connective tissue. Glucosamine helps build healthy cartilage, and MSM is included as a necessary ingredient for forming connective tissue in the joints.

About VetriScience
As the makers of GlycoFlex and an extensive line of pet supplements, VetriScience Laboratories is a leader in the pet health industry. For over 40 years, VetriScience has led the way by providing exceptional and innovative supplements created for the health and well-being of companion animals. They are committed to using only pure and highly researched ingredients to produce quality products that are safe and effective.

Customer Reviews
94% Recommend
94% of reviewersrecommend this product
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771 Reviews
Showing 1-10 of 771 Reviews
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Not Good For Aging Teeth
By Hope on Mar 2, 2021
Nutritionally these chews are good but I’m disappointed in them. They are WAY too hard for aging teeth! My dogs are 6 & 10 and both of them have a difficult time chewing them. I’ve resorted to chopping them by hand into little bits & putting them in their food. If your dog has any dental issues at all choose a different supplement.
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Great Results
By RiosDad on Feb 24, 2021
Our Vet recommended GlycoFlex for our 13 year old Golden Retriever. We have been giving Rio a similar product with lesser strength since he’s six because Goldens are prone to hip and joint problems. We have seen better mobility for our boy with GlycoFlex’s stronger formula. He’s bouncing around again. He’s happier and so are we with these great results.
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Effective and Easy
By Heti on Jan 9, 2021
I love that these are in a chewy treat form. My dog loves them and I’m giving him a treat I can feel good about. These also really work! We have a lean 75lb pit mix that was diagnosed after adoption with bad hips at only 2yrs old. We immediately started him on a supplements to maintain what we could and support his joints. We’ve switch around supplements over the years (he’s 8 now) and we recently went back to this one. I don’t think we’ll ever switch again! I noticed Heath having some trouble with our stairs, after switching to this product that obvious discomfort is gone. After 3wks on these chews, when my husband called Heath over, Heath JUMPED over the back of our couch instead of walking I love that these are in a chewy treat form. My dog loves them and I’m giving him a treat I can feel good about. These also really work! We have a lean 75lb pit mix that was diagnosed after adoption with bad hips at only 2yrs old. We immediately started him on a supplements to maintain what we could and support his joints. We’ve switch around supplements over the years (he’s 8 now) and we recently went back to this one. I don’t think we’ll ever switch again! I noticed Heath having some trouble with our stairs, after switching to this product that obvious discomfort is gone. After 3wks on these chews, when my husband called Heath over, Heath JUMPED over the back of our couch instead of walking around. He hasn’t done that in years! I’ve also noticed him playing more with our other dog too. I’m more than happy with the results and highly recommend this product! … more
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Awesome Price!
By Juju on Feb 15, 2021
My vet wanted to give my immunocompromised dog these treats to help support her joints even though she is young. These are $78 from my vet. The price reduction through chewy is astronomical! Quick delivery and as always, stellar customer service. Love chewy, love this discount, love everything!
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Didn't do anything
By KimG on Jan 4, 2021
No improvement at all with MY dog. I have an 8 yr old Doberman that has progressively worsened over the past year. He has difficulty getting up. He can't even get into the car or on the couch anymore. He gave up trying. I have purchased multiple recommended supplements. The only one that showed any improvement at all was WAGGEDY, the cheapest one, with TURMERIC.
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Good Product
By Cathie on Feb 16, 2021
Our senior Beagle has Cushings & tends to get bouts of sore muscles & joint issues. These chews seem to be helping. Has a little more pep in her step, and she loves them. Her afternoon treat!
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Great for older dogs and toothless one!
By Bird1 on Feb 13, 2021
My 12 yr. old foster loves these treats. He has minimal teeth left as well so it’s a win/win for me. Vetri Science products are always my preference, but can be expensive. Still they are the best.
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Give it Time
By Becky on Dec 21, 2020
I was upset thinking this was not working. I figured since I paid for them, I'm going to keep using them. And it finally started working. It took about a month or so. I actually notice a big difference. My dog used to limp really bad after getting up from sleeping. He is a 12 year old husky and is having hip and joint issues the older he gets. I would say he is at 70-80% better. Just give it time.
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Game Changer!
By TXBorador on Dec 20, 2020
This has absolutely improved the quality of life for my old man. I know lab breeds are prone to hip issues later in life, but this 11 year old dog is running around like a puppy again! I can definitely tell he's building more muscle mass in the rear legs, and I notice much less stiffness when he's getting up from laying down - loves the taste too!
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too expensive
By JustOK on Jan 30, 2021
seems to be working as well as the lower priced joint supplements I've used in the past I don't see any major improvement in my dog to warrant spending the extra cash for this product