Vet-reviewed guide to the best dog joint supplements (UK)
It hits all dog owners at some point: the timing depends on breed and activity level, but sooner or later there is a natural slowing down - a reduction in the fluidity of your pet's movement, less joy in their daily walk, a drop in stamina. This is the point when many dog owners start to search for a supplement to support their dog's joint health. Lots of the leading brands still rely on green-lipped mussel (GLM) powder or glucosamine as their primary active ingredient, but if your dog has been on one of these supplements for six months or more and you haven't seen a clear difference, it may be worth considering Antinol's Green Lipped Mussel Oil based supplement. Each one delivers a solid 50mg of patented PCSO-524, a concentrated GLM oil, which is 100% natural, rapidly absorbed and provides powerful joint support.
Eloise Collins
BSc(Hons) RVN, PgD Vet Phys. Vetz Petz UK Education & Relationship Manager
"Choosing a joint supplement for your pet isn't always straightforward. Labels are often packed with marketing claims and long ingredient lists, but what really matters is whether the product contains evidence-backed ingredients at effective levels. Just as importantly, those ingredients need to be in a form the body can absorb and use. A supplement is only as good as the amount of active ingredient your pet can actually benefit from."
Try Antinol: Starter pack from 71 pence per day
60 day money back guarantee
4-star Trustpilot · 469 UK reviews- 25+ years of veterinary research
- 15+ clinical studies
Try Antinol for 60 days, risk-free
Ready to try? Select your Starter Pack or keep scrolling for more information.
SMALL DOG
Antinol Starter Pack
£53.74 £42.99
Includes starter booster plus maintenance supply. From 71p per day.
Add to basket
LARGE DOG
Antinol Starter Pack
£106.98 £85.49
Includes starter booster plus maintenance supply. Best value per capsule.
Add to basket
60-Day Money-Back Guarantee
Use as directed for 60 days. Not satisfied? Contact us within 90 days for a full refund.
Free UK Delivery
On all Starter Pack orders. Dispatched promptly from our UK fulfilment team.
Secure Checkout
SSL-encrypted. All major cards accepted.
Choosing the Best Dog Joint Supplement: Why Ingredient Form Matters More Than the Label
Struggling to find the best dog joint supplement for your dog? Our vet-reviewed guide compares the top options and explains why the ingredient form matters more than the ingredient list.
Many products contain a promising list of ingredients, but the best dog joint supplements focus on delivering the correct serving of an active ingredient, in a shelf-stable and easily absorbable form. These are the questions the creators of Antinol want to address.
Dog Joint Supplement Comparison: GLM Powder vs Glucosamine vs Fish Oil vs Antinol
Green-lipped mussel powder
GLM powder is not the most efficient way to protect and deliver the valuable fatty acids - EPA, DHA, ETA and OTA - that carry the joint supporting benefits of green-lipped mussel; during manufacture and storage, these fatty acids can also degrade because of exposure to the air.
Not the most potent form
Glucosamine HCl
Evidence for the use of glucosamine and chondroitin for joint health and mobility in dogs is poor and vets no longer recommend them, but many brands are still including these ingredients in their products.
While many products still include glucosamine and chondroitin, recent studies have found a lack of clinical efficacy for relieving pain associated with joint health. Studies have shown that over 80% of trials showed no measurable benefit over a placebo.
Poor evidence for joint health
Fish oils
While fish oil primarily provides EPA and DHA omega 3s, it misses the crucial targeted and rare omega 3 ETA, which helps support natural anti-inflammatory pathways.
Missing additional potential Omega 3s
Antinol is different
Precision ingredients
Antinol focuses on one special patented ingredient: PCSO-524, a highly concentrated GLM lipid oil. This is blended with extra virgin olive oil for stability, digestion and absorption, along with Vitamin E as a preservative. There are absolutely no fillers or other additives. PCSO-524 is extracted from green-lipped mussels in New Zealand within two hours of harvest to ensure optimal freshness and efficacy.
20x the fatty acids of GLM powder
CSO-524 delivers a potent serving of the EPA, DHA, ETA and OTA fatty acids that give green-lipped mussel its joint-supporting properties. These fatty acids concentrate in the oil during extraction, so Antinol delivers where powders can't.
Optimal serving size
Unlike most multi-ingredient products and GLM powders, Antinol delivers a guaranteed 50 mg of marine lipid extract in every softgel, in an easily digestible and absorbable form.
Sealed in oil, stable by design
The fatty acids in PCSO-524 are encapsulated inside a softgel to stabilise the ingredients and prevent oxidation. Oxidation occurs from things like air, heat and light, and can mean that the Omega 3s can start to degrade - making them less effective. Antinol's capsules protect the omega 3s from this. The ingredients are protected from New Zealand to your door, and is shelf stable for 3 years from the date of manufacture.
From Crufts agility champions to retired Labradors
Antinol can be given to all dogs starting from 12 weeks of age, and is a healthy addition to any dog's daily diet. Whether you're looking for joint mobility support for an active agility dog or a gentler daily supplement for a senior companion, starting early can help maintain long term comfort.
Antinol vs everyday UK joint tablet
GLM Oil: Antinol
- Concentrated extract
- 20x more fatty acids than powder. Sealed in the softgel at point of encapsulation to maintain stability.
GLM powder:
typical joint chew
- Higher milligram count on the label; lower concentration of active compounds
- Fatty acids in powder form are more vulnerable to oxidation.
Trusted worldwide. 25+ years of veterinary research
Trustpilot • 4 stars • 469 UK reviews
My dogs have been on Antinol for a few years now and I wouldn't change. They are very active agility spaniels and I love the peace of mind I get knowing their joints are getting the best support.
Jean 2026
Occasionally you find an exceptional product from an exceptional company. This is one of those times. The capsules help our 11 year old cat to stay mobile and behave like her happy self. It's not the cheapest but I've tried others and they are not of the same quality. Their customer service is second to none with trained professionals to give advice. They treat their customers as valued and important.
Customer 2024
My dog was already on a vet recommended joint supplement but I felt they needed more support. The same vet who recommended the original one suggested a change to Antinol as they had been seeing success with other pets. Initially I was a Doubting Thomas but after a few weeks it was the correct change as they're active and flying up the stairs.
James 2026
Absolutely amazing product! My dog is definitely so comfortable. I will continue to use this product.
Lisa 2024
FAQs: your questions, answered clearly
Joint supplements are generally safe for dogs, particularly if they contain natural ingredients, but you should always consult with your vet before starting a new supplement.
There are a range of ingredients that you will see across different supplements, but research supports Green Lipped Mussel Oil as being a fantastic joint supplement ingredient.
If your dog has been on the same product for six months or more and you are not seeing clear results, it's worth asking whether the active compounds in that product are being absorbed in a meaningful concentration. For dogs with green-lipped mussel in their supplement, the form matters: GLM oil delivers a highly concentrated serving of the fatty acids that support joint health, while much larger quantities of GLM powder would be required to deliver the same serving of fatty acids.
It means you have been paying attention. The fact that you noticed the supplement might not be working is exactly the kind of observation that leads to the right decision. Multi-ingredient products may be conceived with the best intentions, but they often rely on an ingredient form that does not deliver what the label implies. We want you to try Antinol risk-free: try it, evaluate it properly, and if you see no difference in your dog's joint health, contact us within 90 days for a full refund.
Most dogs will eat Antinol capsules very easily - some even consider them a treat! But yes. If your dog will not take the capsule whole, pierce it with a pin and squeeze the contents onto their food. The oil has a mild fish smell that most dogs enjoy; a small amount of wet food mixed in helps if they are fussy. We use a softgel capsule rather than a chew for reasons of stability and preservation. If your dog still refuses to take Antinol after a week of trying different approaches, the 60-day money-back guarantee covers you.
Because Antinol offers a concentrated serving of beneficial GLM lipid oil. When a supplement includes several actives, each serving can only include a fraction of what a single-ingredient product provides. PCSO-524 is supported by 15+ studies based on a specific serving size (depending on the dog's weight - 50mg for a small dog; 100mg for a larger dog).
When starting Antinol we always recommend to start with our Starter packs. These contain extra capsules (for free!) for your dog's loading feed, which is the first 15 days. After that, you can continue with the capsules from the starter pack for 60 days. If you or your dog are not happy with Antinol after 60 days, our starter packs are covered by our 60 day money-back guarantee. That's how confident you and your dog will love it!
Give it 60 days.
Your dog will tell you.
Try Antinol: Starter Pack from 71p/day
(60-day money back guarantee)
Trusted in 42 countries worldwide
Official sponsor of Crufts 2026. Headline sponsor of AGILITY AND FLYBALL.
Important information
Antinol is a supplementary feed for dogs and cats and is not a veterinary medicine. It is not intended to diagnose, treat, cure, or prevent any disease. If you suspect your dog has joint or mobility issues, please speak to your vet. If your pet has a diagnosed condition, consult your vet before use.