Dasuquin with MSM Soft Chews

What a chew actually contains

Nutramax publishes a full per-chew analysis for the large-dog formula, which is more than most of the category manages:

The administration schedule for dogs over 60 lb is two chews daily for 4–6 weeks, then one daily. Buy the count with that arithmetic in mind: 150 chews is 75 days at the loading dose, not five months.

The running cost, stated plainly

At the verified Amazon price of $84.99 for 150 chews, a large dog costs about $1.13 a day to load and $0.57 a day to maintain — call it $207 a year after the first bottle. That is not a criticism; it is the number the decision should be made with, because the failure mode with this product is not buying it, it is paying for it indefinitely without ever checking whether it earned the spot.

The evidence, honestly

Updated 13 August 2026, and this is the most important paragraph on the page. This exact product has now been tested in a blinded, placebo-controlled trial that measured dogs on a force plate rather than asking their owners, and it did not separate from placebo. Kampa et al. 2023 (Frontiers in Veterinary Science, DOI 10.3389/fvets.2023.1033188) names its glucosamine arm as "DASUQUIN with MSM Soft Chews, Nutramax Laboratories Consumer Care, Inc." at about 30 mg of glucosamine per kg daily. At week four the change in peak vertical force was −0.05 in that arm against +0.08 on placebo, while two green-lipped mussel lipid extracts and carprofen all improved significantly. A separate group reached the same answer by a different route: 30 dogs on a glucosamine/chondroitin product and 30 on placebo wore activity monitors for 97 days with no difference in activity counts (Scott, Evans & Conzemius 2017, VCOT 30(5):318-323).

Two caveats we owe the product, because they are real. Fifteen dogs per arm cannot exclude a modest effect, and that trial was powered to detect the mussel extract's benefit rather than to rule out a smaller one. And the trial ran maintenance dosing for all six weeks — roughly one large-dog chew — through the exact window this label tells you to give two. Nobody has run the trial at the loading dose. The full comparison is in green-lipped mussel vs glucosamine.

The glucosamine/chondroitin base is the most-studied part, and decades of canine trials on that base have produced modest, inconsistent results. The ASU component — the reason this product exists as a step above Cosequin — has supportive laboratory and animal-model work behind it, but the blinded clinical-trial evidence in pet dogs is thin, and we will not pretend otherwise. Caregiver placebo effects in this exact setting are large and measured: owners scoring their own dog's lameness in a blinded trial produced a 39.7% placebo response rate. That is why our advice is always the same: run one supplement at a time, for the full loading period, against a measurement you took before the first chew.

Who should not buy it

A healthy dog with no diagnosis — Cosequin covers the maintenance case for less money. A household that cannot commit to the 4–6 week loading period and an honest review at the end of it. And any owner expecting NSAID-scale results: if the dog is visibly painful, the conversation to have is with a vet about analgesia, not with a supplement bottle.

Sizing: the 60 lb line decides which tub, and what you pay for it

Almost everything written about this product treats "Dasuquin with MSM" as one thing. It is two, and the boundary is 60 lb of dog.

Nutramax's own chart, read from its product page on 19 August 2026: a 30–59 lb dog takes 2 small/medium chews daily for the initial 4–6 weeks, then 1 daily. A 60–120 lb dog takes 2 large chews, then 1.

Put those together and you get the counter-intuitive result. The smaller dog is the more expensive one to feed, and gets less. A 59 lb dog runs about $217 a year on 600 mg of glucosamine a day; a 61 lb dog runs about $207 a year on 900 mg. Two pounds of dog, ten dollars a year cheaper, half again as much of every active. There is no 150-count tub in the small/medium chew line, which is where most of that gap comes from.

The practical instruction: if your dog is anywhere near 60 lb, weigh him on the practice scales before you order. Do not guess, and do not use last year's number — a dog with a sore joint who has been moving less has usually gained, which in this one narrow respect works in your favour.

Two failure modes this section exists to prevent. Buying the Large tub for a 50 lb dog because it is better value per chew gives him a 50% overdose of everything; the likeliest consequence is loose stool rather than harm, but it is not the label's dose and it is not what your vet asked for. And buying the 42-count tub to "try it" gives a 55 lb dog 21 days at the loading dose, against a label that asks for 28 to 42 — you will stop before the trial finishes and learn nothing. The 84-count is exactly 42 days for that dog, with no chews spare.

Head-to-head against GlycoFlex, on one axis: milligrams per dollar

The nearest competitor by price is VetriScience's Extra Strength Healthy Hip & Joint, the product sold as GlycoFlex Stage 3 until the line was renamed. We do not sell it, so this comparison costs us nothing to make honestly.

For a dog over 60 lb, GlycoFlex delivers more glucosamine and more MSM for two-thirds of the money, and Dasuquin's argument narrows to chondroitin, ASU, and the fact that a vet named it. For a dog between 31 and 60 lb the crossover reverses: GlycoFlex's maintenance dose is half a tablet, so the cheaper product is also the smaller one. GlycoFlex contains no chondroitin at any size, and its maker's own "up to 41%" hind-leg-strength claim traces to no study we could find in Europe PMC on 19 August 2026. The whole comparison, with every panel and receipt, is in Dasuquin vs GlycoFlex.

If chondroitin is specifically why you are buying — because a vet named it — the comparison that matters is a different one, added 24 August 2026. VetriScience's chondroitin carrier is the Ultimate Strength tier (previously GlycoFlex Plus), and its two forms are different formulas: the tablet carries 250 mg of chondroitin but cuts glucosamine to 800 mg, MSM to 500 mg and mussel to 300 mg, while two chews carry 400 mg of chondroitin on top of the full Extra Strength actives — the maker's own comparison copy, read on vetriscience.com that day. Priced per day for a 70 lb dog at maintenance, the chondroitin options line up as: Dasuquin 350 mg at $0.57, Ultimate Strength chews 400 mg at $1.06 ($31.71 per 60-count), Ultimate Strength tablets 250 mg at $0.40 ($47.99 per 120 direct). So Dasuquin is not the cheapest chondroitin — the Ultimate tablet is — but it is the most chondroitin per dollar among the products that do not also strip the other actives to carry it, and the only one of the three with ASU. The full tier teardown is in VetriScience Extra Strength vs Ultimate Strength.

Manganese: what this tub does not contain, and a correction

Added 19 August 2026, and it begins with a correction to this page.

Until that morning the materials line above listed "manganese ascorbate" among this product's ingredients. It should not have. Dasuquin with MSM contains no manganese. We read four panels on Nutramax's own site to be sure: with-MSM soft chews, with-MSM chewable tablets, plain soft chews, plain chewable tablets. The with-MSM large-dog panel has exactly eight rows — glucosamine 900 mg, MSM 800 mg, chondroitin 350 mg, total omega-3s 90 mg, EPA+DHA 75 mg, ASU 90 mg, Boswellia 40 mg, green tea 32 mg — and manganese is not one of them. Nor is it in the other-ingredients list, which runs fish oil, glycerin, lecithin, mixed tocopherols, natural and artificial flavors, rosemary extract, silicon dioxide, soy protein isolate, starch, stearic acid and vegetable oil.

Where manganese is printed, across the same family:

Two practical consequences, and they point in opposite directions.

If you are switching tiers — from Cosequin up to this, or from this up to Advanced — the formulas are not nested the way the marketing implies. Moving from Cosequin to Dasuquin with MSM gains you ASU, Boswellia, green tea and omega-3s and quietly loses you the manganese. Nobody tells you that at the counter.

If you are stacking two products, this is the row that decides your dog's total. Cosequin plus Dasuquin with MSM puts a dog over 60 lb on 9 mg of manganese a day at loading, all from the Cosequin. Cosequin plus Dasuquin Advanced puts him on 15 mg. Both are computable from published panels; neither is computed on any label, because neither label is written on the assumption you own the other. We argue against stacking either way, at can I give my dog Dasuquin and Cosequin together.

Why the ingredient is worth this much attention at all: it is the only one in these panels with a fatal canine case attached to it. A 5-year-old Pug who ate about 100 joint supplement tablets developed acute hepatic failure and was euthanized on day six, with severe hepatic necrosis at necropsy and severely elevated manganese in the liver and kidneys (Borchers et al., J Vet Diagn Invest 2014;26(5):658–663). That paper's own summary is the fair one: manganese is "a ubiquitous, essential trace element and a common ingredient of joint supplement tablets," and "little information is known about the inherent toxic potential if ingested at higher doses." One hundred tablets is not two, and nothing in that case describes a dog on a label dose. It is a reason to keep the tub in a cupboard and to know which tier you are holding — not a reason to stop giving this product as directed.

Calories: the number the whole category declines to print

Also verified absent on 19 August 2026, on both the panel and the Amazon listing: how many calories are in a chew.

For most supplements that would be pedantry. Here it is not. A large dog on the loading dose eats two soft chews a day for four to six weeks, and soft chews are built out of glycerin, starch, vegetable oil and fish oil — the same materials as a treat. Body weight is the single largest modifiable factor in canine osteoarthritis and the one intervention with better evidence than anything in this tub. A joint supplement that will not say what it adds to the day's intake is asking you to run the second-best intervention blind while it quietly taxes the best one.

We are not going to invent a figure. If Nutramax publishes one, we will print it here. In the meantime, the practical move is the free one: if your dog is on two chews a day, take two equivalent treats out of the day. He will not notice, and it costs nothing.

The tablet is the same product on a different base — and that decides it

Nutramax sells this exact formula as a chewable tablet, and until 4 September 2026 this page never mentioned it. Reading both of the maker's product pages side by side that day, the large-dog active panels match line for line: glucosamine hydrochloride 900 mg, MSM 800 mg, sodium chondroitin sulfate 350 mg, ASU 90 mg, Boswellia serrata extract 40 mg, green tea extract 32 mg — on the same schedule, two a day for an initial four to six weeks, then one a day.

Two things differ, and they are not the same size of difference.

The small one is on the front of the panel. The soft chew carries a line the tablet does not: total omega-3s 90 mg, EPA+DHA 75 mg. The chew costs $84.99 per 150 against the tablet's $77.99 per 150 (both Amazon, both in stock, 4 September 2026), so at maintenance that line costs about $17 a year. Put it in proportion before you value it: Colorado State's canine osteoarthritis fish-oil chart lists 4,374 mg of EPA+DHA a day for a 75 lb dog, so 75 mg is about 1.7% of it. This is not your dog's omega-3 supplementation, and the label's habit of printing the row invites exactly that misreading.

The large one is at the bottom of the label, where nobody looks. The chew's inactive list opens with fish oil, then glycerin, lecithin, mixed tocopherols, flavors, rosemary extract, silicon dioxide, soy protein isolate, starch, stearic acid and vegetable oil. The tablet's opens with brewers dried yeast, then dextrose, lecithin, microcrystalline cellulose, mixed tocopherols, flavors, silicon dioxide and soy protein isolate. The omega-3 row is not an added ingredient — it is the chew base appearing on the panel.

Which means: a dog on a fish-free elimination diet cannot have this soft chew, and can have the tablet. Nothing on either listing says so. If that is your dog, buy the tablet instead — this is the one case where the form is not a preference. Note that both forms contain soy protein isolate, so the tablet is fish-free rather than allergen-free; read the inactives against the diet your dog is actually on.

For every other household we would leave this page's recommendation exactly where it is. Seventeen dollars a year is not a reason to move a dog off something he takes willingly, and a supplement that gets refused is worth nothing at any price. The full cross-brand comparison is in soft chews vs tablets, where this line turns out to be the least dramatic of the four we measured.

The documents behind it: no NASC seal, and more paper than most sealed chews

Because the question "is Dasuquin NASC certified" is one people type, here is the full receipt trail as we could read it on 11 September 2026, document by document. Each one vouches for a different thing, and the honest summary is that this chew holds more of them than any sealed chew we cover, and not the one buyers look for.

The seal-holders in this category (YuMOVE, Zesty Paws, Pet Honesty) hold the first row and, as far as we could find, none of the last three. That is why the seal on its own is a poor sorting tool for this aisle, and why we rank this chew first on documents while saying plainly that the one trial it entered, it did not win. The full reasoning, with the 1996 Federal Register notice that explains why no regulator checks any of these products before sale, is in which joint chews you can actually trust.

If the seal specifically matters to you, the tablet form of this product is in the same position as the chew, and the only joint product we cover with both the seal and a blinded trial it won is Antinol Plus, which is a soft gel at roughly three to six times the annual cost, depending on where in its label's maintenance range you dose.