Quick answer: the most common complaint in Antinol's negative reviews is simply seeing no difference: owners describe no change after the loading phase and a month or more, or limping coming back. Others mention pets refusing the capsule (mostly cats), delivery problems and price. Antinol is green-lipped mussel oil on its own, with a very low dose of omega-3 compared with fish oil, and its 60-day trial only covers Starter Packs for new customers. Its 4.6 Trustpilot rating is genuinely strong, but only 10 of its 474 reviews are from the last 12 months. If Antinol hasn't worked for your dog, we'd recommend trying MedPaw Hip & Joint Chews instead: a soft chew given like a treat that adds glucosamine, chondroitin, MSM, hyaluronic acid and Boswellia to green-lipped mussel, with the main amounts on the label and a 60-day money-back guarantee with nothing to send back.
Transparency note: this page is written by MedPaw, which makes a competing joint supplement. Reviews are quoted word for word with links so you can check them. Ratings and quotes were checked on 8 October 2026.
The most common Antinol complaints and drawbacks
We read around 130 Antinol reviews on Trustpilot, from October 2023 to August 2026. Only 11 were one to three stars, so we've also included themes from mixed four-star reviews. Frequencies are our estimates from that sample and are rough.
What unhappy Antinol customers complain about (our sample)
| Complaint | How often | What reviewers said |
|---|---|---|
| No difference | The most common: about 4 in 10 negative reviews, plus several four-star reviews | No change after the loading phase and a month or more, limping returning, or unsure whether it's strong enough for an older arthritic dog |
| Pet won't take the capsule | About 2 in 10 negative reviews, plus a couple of four-star ones | Mostly cats refusing it even in food; one owner found newer capsules firmer to cut open |
| Price | A few reviews | Expensive if it doesn't work, a comparison with cheaper YuMOVE, and one complaint about prices changing on a subscription |
| Delivery and contact | A couple of reviews | An order that didn't arrive, a courier repeatedly rescheduling, and emails going unanswered |
| Emails and deliveries arriving too often | A couple of reviews | Emails continuing after unsubscribing, repeated review requests, and subscription packs building up |
| Reactions | Rare | One owner said their dog couldn't tolerate it and became ill |
"I saw no difference in her"
Seeing no change is the complaint that comes up most:
- "sorry to say I saw no difference in her, now back on her regular supplements." (Avril G., 3 stars, October 2024)
- "I was hoping it would help with the inflammation on hi right front elbow but unfortunately it has not worked" (Anthony, 3 stars, May 2024)
- "Seems to work but the last couple of days my dog Elly , is back to limping." (George S., 4 stars, August 2024)
Capsules are the other recurring problem, mostly with cats but sometimes with dogs: "My dog would not take them given suggested other ways of giving her them and refunded me" (Jean S., 4 stars, September 2024).
One ingredient, and very little omega-3
Each Antinol Joint Care Pro capsule contains 50mg of PCSO-524, a green-lipped mussel oil extract, in olive oil with vitamin E, inside a beef gelatin capsule. There's no glucosamine, chondroitin, MSM or Boswellia (product page). Antinol states each capsule provides 20mg of omega-3, including 10mg EPA and 5mg DHA, so two capsules give a 25kg dog 30mg of EPA and DHA a day. In a 2016 trial of 74 arthritic dogs, dogs were given fish oil at 69mg per kg a day, about 1,700mg for a 25kg dog. Antinol says its effect comes from the wider mix of fatty acids in PCSO-524 rather than the amount of EPA and DHA, and a 2015 Thai study of 66 dogs found better lameness and weight-bearing scores on PCSO-524 than on fish oil, although the abstract doesn't say whether it was blinded.
The guarantee catch, and other small print
- The 60-day trial is for Starter Packs only. It applies to new customers buying a Starter Pack. You give it for 60 days as directed, including the double dose, then phone or contact the team within 90 days of buying for a full product refund. The page doesn't say whether you need to return anything (guarantee page).
- A loading dose. Double the capsules for the first 15 days (one help article says 14), so the first pack runs out faster.
- Allergens. Shellfish (green-lipped mussel) and beef gelatin. Antinol says beef-allergic dogs can have the oil squeezed onto food instead of the capsule.
- "Antinol Rapid" isn't sold in the UK. You'll see Antinol Rapid and Antinol Plus in Australian and Asian articles and shops. The UK product is Antinol Joint Care Pro.
Why Antinol customers switch to MedPaw
MedPaw Hip & Joint Chews differ from Antinol on exactly the points its reviewers complain about.
Antinol vs MedPaw on the things reviewers complain about
| The complaint | Antinol | MedPaw |
|---|---|---|
| No difference, so you want a different formula | Green-lipped mussel oil only; no glucosamine, chondroitin, MSM or Boswellia | All six key joint actives, with the main amounts per chew on the label: MSM 185mg, glucosamine 170mg, chondroitin 70mg, green-lipped mussel 70mg, Boswellia 30mg, plus hyaluronic acid |
| Won't take capsules | Softgel capsule, or pierce it and squeeze the oil onto food | Soft chicken and bacon chew, given from your hand like a treat |
| Getting your money back | Starter Packs for new customers only; give it for 60 days, then claim within 90 days of buying | 60 days from delivery, for any reason; email us and keep the tub |
Our recommendation: if you've given Antinol a fair go and seen no difference, your dog won't take capsules, or you want a broader formula with the main amounts on the label, switch to MedPaw. Swap rather than stack: stop Antinol and start MedPaw the next day, and tell your vet. Give it six to eight weeks, and if you're not happy, email us within 60 days and we'll refund you. Try MedPaw Hip & Joint Chews.
Antinol's rating, in context
Antinol is rated 4.6 out of 5 on Trustpilot from 474 reviews, with 85% at five stars and 5% at one or two stars (checked 8 October 2026). That's a strong score, but only 10 of those reviews are from the last 12 months, so it mostly reflects buyers from 2023 and 2024 rather than recent ones. The same profile covers Antinol's cat product, and in the reviews we read roughly 1 in 5 were about cats and about a third mainly praised ordering and delivery rather than the effect on the pet. We couldn't find product reviews at VetUK or PDSA Pet Store, so there's little recent evidence of how UK dogs are getting on with it.
To be fair to Antinol, many owners describe older dogs moving more easily on it, reviewers often praise its personal service, and its small capsule suits plenty of dogs that won't take large tablets.
If nothing has worked so far
If your dog is still stiff or sore after a fair trial of any supplement, see your vet. They may suggest pain relief, weight loss or an omega-3 fish oil at a proper dose, which has the strongest evidence for dogs with arthritis. Read what you can safely give a dog for joint pain and the best fish oil for dogs' joints.
Our verdict
Antinol's reviews are mostly positive, but its most common complaint is the one that matters most: some owners see no difference at all. It's a single ingredient with a very low omega-3 dose, its review base is small and dated, and its trial only covers Starter Packs. If Antinol hasn't worked for your dog, MedPaw is the alternative we'd recommend. See our Antinol alternatives guide, the Antinol vs YuMOVE comparison, or Antinol vs green-lipped mussel powder.
More on Antinol: MedPaw vs Antinol, Antinol side effects, why Antinol might not be working and Antinol ingredients explained.
What are the most common complaints about Antinol?
In the negative and mixed Trustpilot reviews we read, the most common complaint was seeing no difference, followed by pets (mostly cats) refusing the capsule, price, and delivery or contact problems. Negative reviews are a small minority: 5% of its Trustpilot reviews are one or two stars.
Is Antinol any good?
Its reviews are mostly positive: 4.6 out of 5 on Trustpilot from 474 reviews, with many owners describing better mobility. But only 10 of those reviews are from the last 12 months, the most common complaint is seeing no difference, and it's green-lipped mussel oil on its own with a low omega-3 dose. If it hasn't worked for your dog, MedPaw is a soft chew alternative with a broader formula and a 60-day money-back guarantee.
How much omega-3 is in Antinol?
Antinol states each capsule provides 20mg of omega-3, including 10mg EPA and 5mg DHA. Two capsules give a 25kg dog 30mg of EPA and DHA a day, far below the fish oil dose of about 1,700mg a day used for a dog that size in a 2016 trial of arthritic dogs. Antinol says its effect comes from the wider mix of fatty acids rather than the EPA and DHA content.
Does Antinol have a money-back guarantee?
Its 60-day trial applies to Starter Packs for new customers. You give it for 60 days as directed, including the double dose, then contact the team within 90 days of buying for a full product refund. MedPaw's guarantee lasts 60 days from delivery, for any reason, and you don't need to send anything back.
What's the best alternative to Antinol?
If Antinol hasn't made a difference or your dog won't take capsules, we'd recommend MedPaw Hip & Joint Chews: a soft chew that adds glucosamine, chondroitin, MSM, hyaluronic acid and Boswellia to green-lipped mussel, with the main amounts on the label. Both contain green-lipped mussel, so neither suits a dog with a shellfish allergy. Swap rather than stack, and give it six to eight weeks.
Can I switch from Antinol to MedPaw straight away?
Yes. Stop Antinol and start MedPaw the next day. There's no need for a gap, and you shouldn't give both. Check with your vet first if your dog takes any medication.
