Cosequin vs Tri-Acta: 'No Filler' Is Not the Same as More Medicine

Buy Cosequin if what you want is the most chondroitin per dollar and the ingredient forms that at least appear in a published trial: at each maker's own label dose for a 70 lb dog, Cosequin's smallest maintenance dose delivers more chondroitin per day (300 mg) than either Tri-Acta product's largest (250 mg and 176 mg), at a maintenance cost of $122–243 a year against $128–217, so the two overlap on price and separate on what is in the scoop. Buy Tri-Acta if your dog is on an elimination diet, is refusing tablets, or is small enough that a one-gram scoop is easier than splitting a chewable — it is an unflavoured powder whose panel accounts for every milligram, whereas Nutramax publishes no inactive-ingredient list for its tablet at all, and an unreadable base is disqualifying on an elimination diet. If you do buy it, buy Regular Strength, not the dearer "Maximum Strength" H.A., which contains less glucosamine and less chondroitin per gram than the cheaper tub. Buy neither until the dog's weight has been addressed and you have written down, in advance, what improvement would justify the money. Neither product has been tested as sold. The nearest thing to a clean canine test of this glucosamine-and-chondroitin combination is a blinded, placebo-controlled force-plate trial of Nutramax's own Dasuquin, in which it did not separate from placebo, and we sell that product too. We earn a commission on Cosequin and nothing on Tri-Acta, which is not sold on Amazon in the US at all — so read the Tri-Acta recommendation as the part of this page that costs us money.

The question underneath the question#

Most people arrive at this comparison having already been given an answer somewhere — a forum, a friend at the park, a chatbot asked to weigh the two. The answer was probably fluent, probably accurate in outline, and almost certainly contained no milligrams.

That is the whole problem, because milligrams are the entire decision. Both of these makers publish every active ingredient down to the unit, which puts them ahead of most of the aisle. Once you have the panels and the two dosing charts, the comparison stops being a matter of opinion and becomes arithmetic. It is short arithmetic. What it is not is arithmetic anybody invites you to do, because both boxes are designed to be compared on their fronts.

So here is the one question that resolves this aisle, and it is not "which brand is better": how many milligrams of each ingredient reach my dog per day, at each maker's own recommended dose, and what does that day cost? Everything else on either box is a claim about the box.

What "100% active ingredients" is actually telling you#

Tri-Acta's central pitch is that it contains no fillers. Integricare states it across its store — "100% ALL ACTIVE INGREDIENT – NO FILLER!" beneath the Regular panel, "Canadian made with 100% active ingredients" on the pet supplements page, "There are no fillers in any Integricare product" on its label-reading guide — and it is true: the panel adds to exactly 1,000 mg per gram, with nothing left over.^[1] The company goes further than most and publishes a page teaching you how to compute the inactive fraction of any competitor: add the actives, subtract from the serving size, divide, multiply by a hundred.

The arithmetic is sound. The inference most buyers draw from it is not.

"No filler" is a statement about the denominator — what else is in the scoop. It reads as a statement about the numerator — how much medicine is in the dose. Those are different quantities, and they move independently, because the serving sizes are different. Tri-Acta's dose for a 70 lb dog is two grams. Cosequin's is one to two tablets, and a tablet is bigger than a gram and there are two of them. A product can be 100% pure and still hand your dog less of the ingredient you are buying it for.

That is exactly what happens here, and only on one ingredient — which is why the honest verdict on this page is split rather than lopsided.

dogorthopedic.com

The panels, per unit#

Every figure below was read at source on 31 August 2026 — Cosequin's from Nutramax's own product page, Tri-Acta's from Integricare's US store, and both Tri-Acta panels independently confirmed against a third-party retailer reproducing the label.^[2][3]

Two things in that table deserve naming before we go on.

The glucosamine rows are not strictly like-for-like, and neither maker gives you what you would need to make them so. Cosequin's 600 mg is glucosamine hydrochloride; Tri-Acta's is half sulfate and half hydrochloride. Those are salts, and the amount of glucosamine base inside a milligram of salt differs between them. Neither company publishes the base figure, so nobody — including us — can convert one column into the other exactly. What we can say is that Tri-Acta carrying the sulfate form at all is a genuine point in its favour if you find the human sulfate literature persuasive, and that the difference between the columns is smaller than it looks either way.

Chondroitin is where the two products genuinely part company. A gram of Tri-Acta H.A. is 44% MSM and 8.8% chondroitin; a Cosequin tablet carries 300 mg of chondroitin against 250 mg of MSM. Purity is identical in both cases — every milligram in the Tri-Acta scoop is an active ingredient — and the two formulas still put the weight in different places. That is a formulation choice, not a defect, and it is exactly why "filler-free" and "more of what you came for" are not the same sentence.

A 70 lb dog, per day, at each maker's own dose#

This is the table the decision actually turns on. Cosequin's schedule is by weight band; Tri-Acta's is by weight band in grams, with a doubled loading dose for the first four weeks.

Prices used: Cosequin $24.99 for the 75-count with HA, verified in stock on Amazon 31 August 2026, giving $0.333 a tablet. Tri-Acta at the 300 g size from Integricare's US store the same day — Regular $70 ($0.233/g), H.A. $89 ($0.297/g).^[4]

The one row to carry away: Cosequin's smallest maintenance dose delivers more chondroitin per day than either Tri-Acta product's largest. Not slightly more — 300 mg against 250 and 176. If chondroitin is the reason you are buying a joint supplement, then for this dog the filler-free powder is the weaker product, and weaker by a wide margin.

That gap narrows further up the charts, and we should say so. Tri-Acta's bands keep climbing to 100 lb while Cosequin's top band is open-ended at "over 60 lb," so a 90 lb dog on Tri-Acta Regular's 2–3 g maintenance gets 250–375 mg of chondroitin against Cosequin's unchanged 300–600 mg — overlapping ranges rather than a clear win either way. The wide margin belongs to the 35–75 lb dog this table is about.

If chondroitin is not the reason, the picture flattens considerably. On glucosamine the three columns are within a few hundred milligrams of each other, and on MSM Tri-Acta wins comfortably. Which of those matters most is a question the evidence cannot currently settle, and we will not pretend otherwise below.

The starter size that runs out before the trial does#

Both makers do the same thing, and it is worth catching before you spend anything.

Every one of these labels prescribes a doubled dose for the first four to six weeks. Every one of them also sells an entry size that cannot cover it. For a 70 lb dog, a 75-count bottle of Cosequin is 25 days of loading. A 60 g tub of Tri-Acta H.A. is 15 days. A 60 g tub of Regular is 15 to 20.

That matters more than it sounds. A loading period you abandon two-thirds of the way through does not produce a small version of the answer; it produces no answer at all, and you are left deciding by feel — which is the weakest instrument available here. In a blinded, placebo-controlled trial of dogs with lameness from osteoarthritis, owners judged their dog improved in 39.7% of assessments made while the dog was on placebo.^[13] That is not a comment on anyone's judgement. It is what happens to any person watching a fluctuating disease in an animal they love. If you are going to run the trial, buy the size that covers it — which for a large dog means the 300 g tub or a 132 to 250-count bottle, not the small one that looks like a sensible way to test the water.

There is one more line in Tri-Acta's directions worth reading twice: "If improvement is noticed within four weeks, proceed to the maintenance level. If not, continue the loading dose until the desired response is achieved and then reduce to the maintenance dose." Read literally, that is an instruction with no end date, at double cost, for a dog who is not responding. Set your own stopping point before you start.

Where Tri-Acta genuinely wins, and it is not a small thing#

We earn nothing if you buy Tri-Acta, so let this section be as strong as it deserves to be.

It is the only one of the three whose whole contents are on the label. Tri-Acta's panel accounts for every milligram of the gram, so there is nothing else to disclose. Cosequin is a chewable tablet, which means it has a base — and Nutramax does not publish what that base is. There is no inactive-ingredient list on its own product page for this tablet, verified absent again on 31 August 2026.

For most dogs that is a curiosity. For a dog on a strict elimination or hydrolysed diet for suspected food allergy it is decisive, and not because of any particular ingredient: you cannot clear an ingredient list you cannot read. A diet trial works by excluding everything unaccounted for, and an unpublished base is unaccounted for by definition. That rules the tablet out until your vet has the label in hand, and it leaves the powder straightforwardly in. If your dog is mid-diet-trial, this comparison has already been decided for you and none of the milligram arithmetic above applies.

The serving is tiny. One to three grams of unflavoured powder, sprinkled on food. A dog who has learned to eat around a chewable tablet, or who needs a tablet split every day, is a real problem in a real kitchen, and a powder solves it.

Nobody publishes the calories, and you should ask. Neither maker publishes a calorie figure, and that absence is on both of them equally — we could not find one on any surface for either product, and we are not going to estimate one and present it as a number. What we can say is the mass: one to three grams of powder, or one to three tablets. For an overweight arthritic dog, where weight is the intervention with the best evidence on this page, the honest instruction is to ask about calories for any joint product given daily and to treat a soft chew — which is a treat with a supplement in it — as the case that most deserves the question.

And if you buy it, buy the cheaper tub. The H.A. version is the upper tier — Integricare's own page positions it for "moderate to advanced mobility concerns" and promises "maximum joint protection," and the retailers who stock it title it "Maximum Strength." Per gram it carries less glucosamine (462 mg against 500) and less chondroitin (88 mg against 125) than the tub below it, plus more MSM and 7 mg of hyaluronic acid, for about 27% more money. That is a positioning decision, not a measurement, and it is the second time this site has found the same shape — VetriScience's Ultimate Strength tablet carries less glucosamine, half the MSM and half the mussel of the Extra Strength tier below it. Both times, the fix cost nothing: read the two panels.

dogorthopedic.com

What the evidence says about either of them#

Not much, and it is important to say so before anyone reads the tables above as a ranking of effectiveness. They are a ranking of milligrams. Milligrams are what you can check; they are not the same as benefit.

A 2017 review in the Open Veterinary Journal is the fairest summary available. It found that glucosamine hydrochloride and chondroitin sulfate are "commonly recommended by veterinarians for treating osteoarthritis in dogs" despite "limited and conflicting evidence," and named the underlying problem directly: "a paucity of well-designed clinical veterinary studies investigating the true treatment effect of glucosamine and chondroitin."^[5]

There is one canine trial the whole category leans on, and it deserves reading rather than citing. McCarthy and colleagues, in The Veterinary Journal in 2007, randomised 35 dogs with confirmed osteoarthritis of the hips or elbows to an oral glucosamine hydrochloride and chondroitin sulfate combination or to carprofen — double-blind, multi-centre, with re-examinations at days 14, 42 and 70. The supplement group showed statistically significant improvement in scores for pain, weight-bearing and severity by day 70, with a slower onset of response than carprofen.^[10]

That is a real positive result in real dogs, and it is the strongest thing this category has. Two features of its design decide how much weight it can carry. There was no placebo arm — the comparator was carprofen, an active drug — so nothing in the trial tells you what those 35 dogs would have done on nothing at all. And the outcome was the treating veterinarian's subjective score rather than a force plate. In a disease that waxes and wanes, watched by people who want the dog to be better, both arms improving is what you would expect whether or not the supplement contributed. It also tested the generic combination and named no brand, so it belongs to the ingredients rather than to either product on this page.

Against that background, here is what each side actually has.

Cosequin is the only one of the two whose specific patented forms have been through placebo-controlled trials at all — and the two results point in different directions.

The positive one was run in people. Das and Hammad, published in Osteoarthritis and Cartilage in 2000, randomised 93 patients with knee osteoarthritis to FCHG49 glucosamine hydrochloride, TRH122 low-molecular-weight sodium chondroitin sulfate and manganese ascorbate, or to placebo, for six months. In the 72 patients with mild-to-moderate radiographic disease, the supplement group improved on the Lequesne Index at four and six months (P = 0.003 and P = 0.04), with 52% responding against 28% on placebo. In the 21 patients with severe disease, there was no significant improvement.^[6] That is a real trial with a real result, and it is a trial in human knees. It does not tell you what happens in a dog, and the daily dose it used — 2,000 mg of glucosamine and 1,600 mg of chondroitin in an adult human — is not a dose anyone has validated for a 32 kg animal.

The canine result is the one that costs us money, so here it is. Those same patented forms have been tested against placebo in dogs, inside a different Nutramax product, and they did not separate from it. Kampa and colleagues block-randomised 75 dogs with hip osteoarthritis into five arms — two marine lipid extracts, carprofen, placebo, and glucosamine with chondroitin (16 dogs in that arm at analysis, 14 to 15 in the others), that last arm delivered as Dasuquin with MSM, Nutramax's own product, named in the paper. Be precise about the read-across: the paper names the product and the milligrams, not the trademarked FCHG49 and TRH122 designations, so what carries over to Cosequin is the same manufacturer and the same glucosamine-hydrochloride-plus-sodium-chondroitin-sulfate combination, not a proven-identical tablet. Everyone was blinded and the outcome was peak vertical force measured on a force plate rather than anybody's impression. At six weeks the glucosamine arm sat between the placebo group and the other treatment groups, with no significant advantage over placebo.^[14] Sixteen dogs in that arm cannot exclude a modest benefit, and the trial was powered to detect a different compound's effect rather than to rule this one out — but it is the closest thing to a clean test these ingredients have had in a dog, and it is not the result the shelf implies. We sell Dasuquin as well as Cosequin, and we would rather you read that paragraph here than find it somewhere else.

Tri-Acta has nothing published. A Europe PMC search across the full literature on 31 August 2026 for "Tri-Acta" or "Integricare" returned one record, an unrelated 1997 paper on thyroid hormones in Estonian dairy cows that matched on the word "Acta."^[7] That is not a mark of dishonesty — most of this aisle has nothing published either. It does mean the dose on the label is a quantity the company chose rather than a quantity anyone tested.

And a note on the ingredient Tri-Acta contains most of. MSM makes up 44% of every gram of the H.A. formula, and we could find no controlled trial of MSM as a single agent in dogs with osteoarthritis. A Europe PMC search on 31 August 2026 across methylsulfonylmethane and canine joint terms returned 299 records, of which the only canine MSM supplementation study was about hair quality and faecal microbiome in Poodles.^[8] That is our search, on one database, on one day, and someone may find better. Until they do, the largest single ingredient in the filler-free formula is the one with the least canine evidence behind it.

“Because your dog can't tell you how much pain he or she is in.”

The claims we could not check, on both sides#

Two credentials appear in this comparison that we want to be honest about failing to verify.

Tri-Acta advertises a Health Canada credential, describes what it means, and publishes no number to look it up with. Both US product pages carry the same claim, and it is a strong one. The Regular page: "TRI-ACTA is a Health Canada designated Veterinary Health Product (VHP). This means the contents are regulated and verified by Health Canada." The H.A. page says the same of itself.^[15] "Regulated and verified" is the sort of sentence that should end an argument. We could not get it to start one. No notification number appears on either page, and without a number there is nothing to look up. Health Canada's own public register of notified veterinary health products is a JavaScript application that returns nothing at all to an automated request: on 31 August 2026 it served us only the message "This site requires JavaScript."^[9] So the one regulatory credential in this comparison is also the least checkable claim on either side. We are not saying it is untrue — we are saying that a claim about verification, published without the number that would let anyone verify it, pointing at a register no machine can read, is doing none of the work it appears to do. If you want it to count, ask Integricare for the NN and check it yourself in a browser.

Cosequin's "#1 vet recommended" line is a survey, and its own footnote says so. The claim on Nutramax's page is to be "the #1 vet recommended retail joint health supplement brand," footnoted: "Source: Among retail brands. Survey conducted among small animal veterinarians who recommended oral joint health supplements." Read the footnote and the claim shrinks to what it is — a popularity measure among vets who already recommend supplements, restricted to retail brands. It is not a clinical finding, and our own page for this product says so rather than repeating it. We raise it here because it is the single most persuasive sentence on the box we get paid for, and because it would be easy for us to let it stand.

Who should buy neither#

The cheapest interventions come first, and one of them is the only thing here that has been studied as itself rather than as an ingredient.

• The dog is carrying extra weight. In nine overweight dogs with hip osteoarthritis, a weight-reduction programme produced a significant decrease in hind-limb lameness on diet alone.^[12] That is a small, unblinded, uncontrolled study — weaker in design than McCarthy 2007, which this page has already declined to lean on — and we are not going to pretend otherwise. What it has that the shelf above does not is a result about the intervention itself rather than about an ingredient inside somebody's product, and it costs nothing to try. Ask for a body condition score at the next visit and settle that before committing to $122–$217 a year.
• You have no baseline. Both labels ask you to judge improvement over four to six weeks, and human memory is not an instrument for this. Score one observable thing before the first dose — the jump into the car, the length of the morning stiffness, the stairs — and score it again at six weeks. Our guide to telling whether a limp is actually improving explains how to do that fairly, and why doing it badly is worse than not doing it.
• The dog is visibly painful right now. Neither of these is analgesia and neither will help this week. That is a vet appointment, not a purchase.
• You are planning to run both at once. Don't — not for safety reasons so much as because you will destroy your own ability to learn anything from either. We wrote out the arithmetic of that mistake in can I give Dasuquin and Cosequin together.

The channel note#

Cosequin's linked 75-count was $24.99 on Amazon on 31 August 2026, and the larger bottles are cheaper per tablet — the plain Plus MSM 132-count worked out at about $0.26 against $0.33^[11], which over a year of maintenance for a dog over 60 lb is about $25 at one tablet a day and about $50 at two, for a formula difference of 6 mg of hyaluronic acid. Buy on price per tablet.

We could not find Tri-Acta on Amazon in the US: the Amazon Creators API returned zero results for both "Integricare" and "Tri-Acta H.A. for pets powder" on 31 August 2026.^[16] That is two search terms on one day through one interface, so read it as the limit of our search rather than as proof of absence — but it is why there is no buy link for Tri-Acta on this page and no commission in it for us. The US route is the maker's own store, us.integricare.ca, where the pet range runs $26–$70 for Regular and $31–$89 for H.A. across the 60 g, 140 g and 300 g sizes. Two practical notes from the store's own pages that day: free shipping starts at $100, which a single tub does not reach, and the site banner warns that "US delivery may be delayed due to tariff processing." The returns page offers "an exchange or a refund for the purchase price of the product" with no window stated and no statement about who pays return postage, so treat the guarantee as unspecified rather than generous.

One defect in Tri-Acta's chart, and one in Cosequin's#

Neither is a reason to avoid either product. Both are the kind of thing you should know before you measure anything out.

Tri-Acta's weight bands overlap at their edges. The chart reads "10-35 lbs" then "35-75 lbs" then "75-100 lbs." A dog weighing exactly 35 lb, or exactly 75 lb, has two answers on the same chart. Round to the band your dog is heading toward, and ask your vet if it matters to you.

Both charts stop scaling, in opposite directions. Tri-Acta's ends at 100 lb with no row above it, so for a Great Dane the label says nothing and anything you read is somebody's extrapolation. Cosequin's top band is "over 60 lbs," open-ended, so a 61 lb dog and a 130 lb dog are given the identical three tablets. Both of those are administrative lines rather than biological ones, and the dog does not change at the boundary. If your dog sits near an edge of either chart, that is a question worth two minutes of a vet's time.

The one we can sell you, and what it is for#

It earns the recommendation on the checkable things: the most chondroitin per dollar of the three, the ingredient forms that at least appear in a published randomised trial, and a price you can verify in one click. It does not earn it on proof that it works, because that proof does not exist for this category. Start it, buy the bottle size that covers the loading month, and judge it in six weeks against something you wrote down in advance. If your dog is on an elimination diet, buy the powder instead and we will earn nothing, which is the correct outcome.

If you want to go further into the category before deciding, our joint supplement roundup covers the whole shelf, Dasuquin vs Cosequin handles the upgrade question inside Nutramax's own line, and the dosing-by-weight reference has the band-by-band arithmetic for every product we cover.

What to do this week#

Take the tub or bottle you already own, if there is one, and do the three lines: milligrams per unit, units per day at your dog's weight, cost per day. It is the only quantity in this aisle that is fully knowable, and it is knowable tonight.

Then, before the next dose, write down one thing you can see — how long the morning stiffness lasts, whether he takes the last step or hops it, whether the car still needs a lift. Date it. That sentence is worth more than either product on this page, because it is the only way six weeks from now will tell you anything.

The delay this site keeps writing about is usually the months before a diagnosis. There is a quieter version of it here: a year spent faithfully giving a dose nobody ever checked, to a dog who was never measured before it started, ending in a decision made on a feeling. That year is recoverable. It just has to be spent on purpose.

Sources#

1. Integricare. "TRI-ACTA H.A. for Pets" and "TRI-ACTA for Pets," US store product pages. us.integricare.ca — read 31 August 2026. H.A. panel per 1 g: glucosamine 462 mg (sulfate 231, HCl 231), MSM 443 mg, chondroitin sulfate 88 mg, hyaluronic acid 7 mg. Regular panel per 1 g: glucosamine 500 mg (sulfate 250, HCl 250), MSM 375 mg, chondroitin sulfate 125 mg. Maintenance charts and the "double the recommended daily maintenance level for up to 4 weeks" instruction as quoted. The H.A. page positions the product for "Moderate to advanced mobility concerns" and promises "maximum joint protection"; the Regular page carries "100% ALL ACTIVE INGREDIENT – NO FILLER!" beneath its panel.
2. Nutramax Laboratories. "Cosequin Maximum Strength (DS) Plus MSM and HA Chewable Tablets." cosequin.com — read 31 August 2026: 600 mg glucosamine HCl (FCHG49), 300 mg sodium chondroitin sulfate (TRH122), 250 mg MSM, 6 mg sodium hyaluronate, 3 mg manganese (manganese ascorbate) per tablet; dosing up to 15 lb ½ tablet, 16–30 lb 1, 31–60 lb 2, over 60 lb 3 for the initial 4–6 weeks, then ½ every other day / ½ / 1 / 1–2. No inactive ingredient list and no calorie figure published, verified absent the same day. "#1 vet recommended retail joint health supplement brand" footnoted "Source: Among retail brands. Survey conducted among small animal veterinarians who recommended oral joint health supplements."
3. Greenhawk. "Tri-Acta Canine H.A. Maximum Strength Pet Supplement 300 g." greenhawk.com — read 31 August 2026, used as an independent reproduction of the label panel and maintenance chart. The Regular Strength panel (glucosamine 500 mg — sulfate 250, HCl 250 — MSM 375 mg, chondroitin sulfate 125 mg per gram) was independently reproduced the same day by the retailer Little Chief at littlechief.dog, matching Integricare's own US page.
4. Integricare US store product feed. us.integricare.ca/products.json — retrieved 31 August 2026, store currency USD: TRI-ACTA for Pets 60 g $26.00 / 140 g $43.00 / 300 g $70.00; TRI-ACTA H.A. for Pets 60 g $31.00 / 140 g $54.00 / 300 g $89.00, all listed available. Site banner: "Free shipping over $100! | US delivery may be delayed due to tariff processing." Customer service page offers "an exchange or a refund for the purchase price of the product," with no window and no postage terms stated.
5. Bhathal A, Spryszak M, Louizos C, Frankel G. "Glucosamine and chondroitin use in canines for osteoarthritis: A review." Open Veterinary Journal. 2017;7(1):36-49. doi:10.4314/ovj.v7i1.6 — "Despite limited and conflicting evidence, the natural products glucosamine hydrochloride (HCl) and chondroitin sulfate are commonly recommended by veterinarians for treating osteoarthritis in dogs. There is a paucity of well-designed clinical veterinary studies investigating the true treatment effect of glucosamine and chondroitin."
6. Das A Jr, Hammad TA. "Efficacy of a combination of FCHG49 glucosamine hydrochloride, TRH122 low molecular weight sodium chondroitin sulfate and manganese ascorbate in the management of knee osteoarthritis." Osteoarthritis and Cartilage. 2000;8(5):343-350. doi:10.1053/joca.1999.0308 — randomised, double-blind, placebo-controlled; 93 human patients; 1,000 mg glucosamine HCl + 800 mg chondroitin sulfate + 152 mg manganese ascorbate twice daily for 6 months; in 72 patients with mild-to-moderate radiographic OA, Lequesne Index improved at 4 and 6 months (P = 0.003, P = 0.04), 52% response versus 28% placebo; in 21 patients with severe OA, no significant improvement; adverse events 17% versus 19%.
7. Europe PMC REST API. Search for "Tri-Acta" OR "Integricare," run 31 August 2026 — hitCount 1, the single record an unrelated 1997 Acta Veterinaria Scandinavica paper on thyroid hormones in Estonian dairy cows, matching on "Acta." europepmc.org
8. Europe PMC REST API. Search for (methylsulfonylmethane OR MSM) AND (dog OR canine) AND (osteoarthritis OR joint OR lameness), run 31 August 2026 — 299 records; no controlled clinical trial of MSM as a single agent in dogs with osteoarthritis identified. The only canine MSM supplementation study returned was "Dietary Supplementation with Methylsulfonylmethane and Myo-Inositol Supports Hair Quality and Fecal Microbiome in Poodles," Animals (Basel) 2024, PMID 39765547. europepmc.org
9. Health Canada. Veterinary Health Products public register. health-products.canada.ca — 31 August 2026: returned HTTP 200 with a JavaScript-required interstitial and no product data to automated retrieval; the canada.ca veterinary health products policy pages returned HTTP 403 to the same requests. No notification number for Tri-Acta was found published on any page of Integricare's own site.
10. McCarthy G, O'Donovan J, Jones B, McAllister H, Seed M, Mooney C. "Randomised double-blind, positive-controlled trial to assess the efficacy of glucosamine/chondroitin sulfate for the treatment of dogs with osteoarthritis." The Veterinary Journal. 2007;174(1):54-61. doi:10.1016/j.tvjl.2006.02.015 — 35 dogs with confirmed osteoarthritis of hips or elbows; randomised, double-blind, positive-controlled (carprofen), multi-centre; re-examined on days 14, 42 and 70, and again on day 98 after withdrawal; response based on subjective evaluation by the participating veterinarians; significant improvement in scores for pain, weight-bearing and severity by day 70 (P less than 0.001), with onset slower than carprofen. No placebo arm, and no brand named — the trial tested the generic combination.
11. Amazon Creators API. Searches for "Integricare" and "Tri-Acta H.A. for pets powder," run 31 August 2026 — zero results for both. Cosequin ASIN B0753LVSCB (Maximum Strength Plus MSM and HA, 75 count) In Stock at $24.99 the same day, giving $0.333 per tablet. The plain Plus MSM 132-count at $34.91 ($0.264 per tablet) was verified on 21 August 2026 and is carried on our product page for this item.
12. Impellizeri JA, Tetrick MA, Muir P. "Effect of weight reduction on clinical signs of lameness in dogs with hip osteoarthritis." Journal of the American Veterinary Medical Association. 2000;216(7):1089-1091. doi:10.2460/javma.2000.216.1089 — nonblinded prospective clinical trial, 9 client-owned overweight dogs, no control arm; significant decrease in hind-limb lameness with weight loss achieved on diet alone.
13. Conzemius MG, Evans RB. "Caregiver placebo effect for dogs with lameness from osteoarthritis." Journal of the American Veterinary Medical Association. 2012;241(10):1314-1319. doi:10.2460/javma.241.10.1314 — blinded, placebo-controlled; owners recorded improvement in 39.7% of assessments of dogs receiving placebo.
14. Kampa N, Kaenkangploo D, Jitpean S, Srithunyarat T, Seesupa S, Hoisang S, Yongvanit K, Kamlangchai P, Tuchpramuk P, Lascelles BDX. "Study of the effectiveness of glucosamine and chondroitin sulfate, marine based fatty acid compounds (PCSO-524 and EAB-277), and carprofen for the treatment of dogs with hip osteoarthritis: A prospective, block-randomized, double-blinded, placebo-controlled clinical trial." Frontiers in Veterinary Science. 2023;10:1033188. doi:10.3389/fvets.2023.1033188 — 75 dogs with hip osteoarthritis analysed across five arms: 14 PCSO-524, 16 glucosamine and chondroitin sulfate, 15 EAB-277, 15 carprofen, 15 placebo; outcomes peak vertical force and orthopaedic assessment score at weeks 0, 2, 4 and 6. The glucosamine and chondroitin arm changed by −0.05 ± 6.34 at 4 weeks and 1.08 ± 5.49 at 6 weeks, falling between the placebo group and the other treatment groups, with no significant advantage over placebo. The glucosamine arm was Dasuquin with MSM, named in the paper.
15. Integricare. TRI-ACTA for Pets and TRI-ACTA H.A. for Pets, US store product pages, rendered HTML read 31 August 2026. us.integricare.ca — "Yes, TRI-ACTA is a Health Canada designated Veterinary Health Product (VHP). This means the contents are regulated and verified by Health Canada," and on the H.A. page "like our regular TRI-ACTA product, TRI-ACTA H.A. is also a Health Canada designated Veterinary Health Product (VHP), meaning the contents are regulated and verified by Health Canada." No notification number appears on either page. Note for anyone re-checking: Integricare's Shopify product records carry additional wording (including "Health Canada approved Low Risk Veterinary Health Product (LRVHP) designation" and "TRI-ACTA H.A. Maximum Strength") that the storefront does not render, so quote the rendered page rather than the product feed.
16. Amazon Creators API. Searches for "Integricare" and "Tri-Acta H.A. for pets powder," run 31 August 2026 — zero results for both. Two search terms, one day, one interface; recorded as the limit of our search, not as proof of absence from the marketplace.

This article is educational and does not replace veterinary advice. Joint supplements are not pain relief. A dog who is visibly painful, or who has got suddenly worse, needs an examination rather than a purchase.