Excellent dose transparency and in-house batch testing on a weakly-evidenced active; in our view it lands Good, not Strong, because glucosamine and chondroitin evidence for osteoarthritis is contested.
Last reviewed June 2026DogsJointchewable tabletPartially verified
By the PetScored Editorial Team. Every sub-score links to the rules and sources behind it - see the full trail under the score.
Data status
Partially verified
Some primary-source fields are verified; unresolved fields remain visible.
Last reviewed
June 2026
The five sub-scores
How Nutramax Cosequin DS Plus MSM Chewable Tablets scores.
Evidence QualityDoes the primary active have credible evidence for the claimed benefit, ideally in the target species?
9.0
Active DoseDoes a labeled daily serving deliver the studied effective dose at the 10 kg dog / 4 kg cat reference?
9.5
Ingredient ClarityCan a buyer see exactly what they are getting, in a form they can evaluate?
7.8
Safety & ManufacturingThird-party quality signals, manufacturing, and FDA/CVM recall and warning-letter history.
8.0
ValueCost per day at the reference serving relative to the category-type median.
Evidence for the active
Glucosamine + chondroitin sulfate
Contested. An early RCT showed slow improvement, but the 2022 meta-analysis found a very marked non-effect and recommended against use for OA pain. Best-selling but weakly evidenced.
Claimed for: joint / osteoarthritis pain. Evidence tier 5.5/10 (level A/B). This is the population-level evidence for the active doing what is claimed, not a prediction for an individual pet.
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Evidence Quality5.5
30% of total score
4 scoring rule(s)0 context item(s)
Evidence Quality is computed from the cited evidence-library tier for the primary active and claim, with deterministic adjustments.
RuleInputScoreEvidence
Evidence tier of the primary activeEvidence Quality starts from the evidence library tier for the active the headline claim rests on, keyed by active, claim, and species, with at least one cited primary source.
Headline placed on a well-evidenced disclosed activeA combination product earns a small credit only when its headline claim sits on a genuinely well-evidenced, disclosed active rather than a trace-ingredient halo.
not applicable0.0B
Proprietary blend hides the headline activeA proprietary blend that hides per-active amounts cannot be credited for evidence the label will not let a buyer locate.
no blend0.0B
Claim overreaches the evidence tierA claim that implies more than the evidence base supports is penalized so marketing language cannot inflate the score.
within tier0.0B
Active Dose9.0
25% of total score
6 scoring rule(s)1 context item(s)
Active Dose is computed from per-active disclosure, the reference-serving dose vs the studied dose, weight scaling, and form, with a proprietary-blend cap at 4.0.
RuleInputScoreEvidence
Active Dose baselineActive Dose starts at 3.0 and is built up only by disclosed, studied, weight-scaled, bioavailable dosing - the pill is not the dose.
3.0 before disclosure and dose adjustments+3.0B
Per-active amounts disclosedEvery active disclosed in a measurable unit (mg, CFU, IU) is the precondition for crediting any delivered dose.
all actives quantified+2.0A
Reference-serving dose meets the studied effective doseThe delivered dose at the 10 kg dog / 4 kg cat reference serving is compared to the studied effective dose; meeting it earns the full credit.
meets or exceeds+3.0A
Reference-serving dose reaches 50-99% of the studied doseA reference serving that reaches 50-99% of the studied dose earns partial credit; this and the full-dose credit are mutually exclusive.
not applicable0.0A
Feeding guide scales the serving by body weightA serving that scales across body-weight bands keeps larger animals at a proportional dose.
weight-scaled guide+1.0B
Bioavailable studied form usedThe form credit is awarded only when form materially changes bioavailability and the label uses the form shown effective in the cited evidence (not for form-agnostic actives such as glucosamine).
form not credited0.0B
Proprietary-blend Active Dose capWhen a proprietary blend hides per-active amounts, Active Dose is capped at 4.0 because no delivered dose can be verified.
no capcontextA
Ingredient Clarity9.5
15% of total score
6 scoring rule(s)0 context item(s)
Ingredient Clarity is computed from naming, blend transparency, inactive disclosure, and sourcing statements.
RuleInputScoreEvidence
Ingredient Clarity baselineIngredient Clarity starts at 6.0 and adjusts for what the label actually shows.
6.0 before disclosure adjustments+6.0B
Every active named with specific formNaming each active with its specific form (glucosamine HCl, EPA/DHA from fish oil, a named probiotic strain) earns clarity credit.
named with form+2.0A
No proprietary or blend labels masking amountsA label free of amount-masking blends earns clarity credit.
no blend+1.0A
Proprietary blend masks per-active amountsA proprietary blend that masks per-active amounts is penalized so a dose-hiding label scores below a transparent one - the v1.0 fix that lets Clarity drop below its baseline.
not applicable0.0A
Inactive ingredients / carriers disclosedFull disclosure of inactive ingredients and carriers earns partial clarity credit.
inactives disclosed+0.5B
Sourcing or standardization statedA stated standardized extract, named strain provenance, or country of origin earns limited clarity credit.
not stated0.0C
Safety & Manufacturing7.8
15% of total score
8 scoring rule(s)0 context item(s)
Safety & Manufacturing is computed from NASC and testing signals, named cGMP manufacturing, and FDA/CVM recall and warning-letter history.
RuleInputScoreEvidence
Safety & Manufacturing baselineSafety & Manufacturing starts at 6.0 and adjusts for quality seals, testing, manufacturing, and regulatory history.
6.0 before quality signals+6.0B
NASC Quality SealThe NASC Quality Seal is a manufacturing-quality signal in a lightly pre-market-regulated category.
no NASC seal0.0B
Independent third-party testingIndependent third-party testing (NSF, USP, ConsumerLab, BSCG, or equivalent) earns the full testing credit and supersedes in-house QC.
none0.0A
Manufacturer batch-tested to label claimDocumented in-house batch testing earns partial credit; it does not stack with independent third-party testing, which supersedes it.
documented in-house QC+0.8B
Named cGMP facilityManufacturing in a cGMP facility the company names and stands behind earns partial credit.
facility named and stood behind+0.5B
No FDA/CVM warning letter in 5 yearsA verified-clean regulatory record (no FDA/CVM warning letter in five years) earns credit; an unverified record earns none, never a penalty.
verified clean+0.5A
Recall in the past 5 yearsA recall in the past five years reduces Safety when matched to the brand/manufacturer.
no recall in 5 years0.0A
Class I recall or active FDA/CVM warning letterA Class I recall or an active FDA/CVM warning letter is the heaviest Safety penalty when verified and relevant.
none0.0A
Value8.0
15% of total score
1 scoring rule(s)2 context item(s)
Value is computed from cost per day at the reference serving relative to the category-type median.
RuleInputScoreEvidence
Cost per day at the reference servingValue uses the price of one recommended daily serving for the 10 kg dog / 4 kg cat reference, not cost per pill or per bottle.
USD 0.28/daycontextC
Cost per day vs category-type medianThe Value score is banded from cost per day relative to the median for the supplement type (joint, gut, omega, calming, multivitamin).
56% of joint median+8.0C
Value is approximate (effective dose unconfirmed)When a proprietary blend or an unestablished dose means a day's serving may not be an effective dose, Value is banded on price with a visible caveat rather than dropped from the composite.
effective dose establishedcontextC
Source record
Confidence is visible by design.
Actives, dose, testing, and recall facts are researched and cited below; some prices are single-retailer captures. Fields we cannot fully verify are marked by source confidence rather than assumed.
Captured
June 8, 2026
Confidence
Partially verified
Sources
Cosequin DS Plus MSM Supplement Facts captured June 8, 2026 store.cosequin.com 132 ct price captured June 8, 2026
This score is our opinion, formed by applying a published rubric to label data, a cited evidence library, and public source records - not a statement of objective fact and not veterinary advice. We score the evidence and the disclosed dose, not whether a product will help an individual pet. See the supplement methodology and medical disclaimer. Dosing and use are decisions for you and your veterinarian.
