Key Takeaways
- The only joint supplement in our review with ASU (avocado/soybean unsaponifiables) at a full 1,050 mg therapeutic dose — a clinically studied ingredient most competitors omit entirely.
- Uses trademarked, specification-controlled raw materials (FCHG49 glucosamine, TRH122 chondroitin, NMX1000 ASU), indicating batch-level quality control that generic formulas cannot match.
- Glucosamine is underdosed at 7,200 mg — 72% of the 10,000 mg therapeutic threshold. This is the product’s most significant formulation weakness.
- Strongest quality assurance profile in our review: cGMP facility, 80+ documented quality checks, explicit contamination testing claims, and label claim verification program.
- Good daily cost at $1.73/day, but cost per gram of glucosamine ($0.24/g) is higher than competitors due to the lower dose.
Label Transparency — 12 / 15
All six active ingredients are individually quantified with exact milligram amounts per 17.5 g serving — glucosamine HCl at 7,200 mg, MSM at 5,000 mg, chondroitin sulfate at 1,200 mg, ASU at 1,050 mg, boswellia serrata extract at 300 mg, and manganese at 50 mg. No proprietary blends. Full marks for active quantification (6/6).
Source disclosure is absent. Neither glucosamine nor chondroitin — both source-relevant ingredients — have their raw material origin stated on the label. This is surprising given that Nutramax uses trademarked specifications (FCHG49, TRH122) which imply controlled sourcing, yet the actual source (shellfish, bovine, etc.) is not disclosed to the consumer (0/3).
Serving details are complete: exact grams per serving (17.5 g), calculable servings per container, full inactive ingredient list, and weight-based dosing instructions (4/4). The use of trademarked ingredient specifications — FCHG49 for glucosamine, TRH122 for chondroitin, and NMX1000 for ASU — earns full marks for specification standards (2/2). These designations refer to published manufacturing and purity standards, a meaningful quality signal.
Ingredient Form — 15 / 20
Across six scored ingredients, the average form quality is acceptable but not outstanding. Glucosamine is in the preferred HCl form but source is unspecified (3/4). Chondroitin sulfate has no source stated and no low-molecular-weight designation (2/4 — the lowest form score in the product). MSM is standard methylsulfonylmethane (3/4). ASU is standardized to at least 30% unsaponifiables as stated (4/4 — the strongest form score). Boswellia is listed as an extract but not standardized to boswellic acid content (3/4). Manganese form is unspecified, scored at the default (3/4).
Average form score: (3+2+3+4+3+3) / 6 = 3.00, multiplied by 5 = 15/20. The chondroitin form drags the average down. If Nutramax disclosed the source and molecular weight specification for chondroitin, this score would improve by 1–2 points.
Dosing Adequacy — 12 / 20
For joint health supplements, four ingredients are scored. In Cosequin ASU, both HA and ASU are present — per the scoring rules, the ingredient with the higher dose ratio is scored in this dimension. ASU at 1,050/1,000 mg (105%) scores higher than HA would, so ASU occupies the fourth slot.
Glucosamine (primary active): 7,200 mg against a 10,000 mg threshold — 72%. Score: 5/8. This is the product’s most significant shortfall. At 72% of the therapeutic dose, a 500 kg horse receives a meaningful but suboptimal amount. Horses in heavy work or with advanced joint deterioration would benefit from the full 10,000 mg.
MSM: 5,000 mg against a 10,000 mg threshold — 50%. Score: 2/4. Half the therapeutic dose. MSM at this level provides some antioxidant benefit but falls short of the upper therapeutic range supported by research.
Chondroitin sulfate: 1,200 mg against a 2,500 mg threshold — 48%. Score: 1/4. Similar to SmartFlex Ultra, chondroitin is present but underdosed relative to therapeutic targets.
ASU: 1,050 mg against a 1,000 mg threshold — 105%. Score: 4/4. Full therapeutic dose achieved. This is the product’s dosing strength — ASU is expensive and most formulas that include it underdose.
Formula Design — 10 / 15
The formula includes three of four core joint health ingredients — glucosamine, chondroitin, and MSM are present, but hyaluronic acid is absent. (ASU occupies the Dim 3 scoring slot instead of HA, but HA is not in the product at all.) Core completeness: 3/4 = 4 points.
Beyond the core, two additional active ingredients are present at quantified doses: boswellia serrata extract (300 mg) and manganese (50 mg). ASU is counted in Dimension 3, not here. Supporting breadth: 2/5.
Formula differentiation is where Cosequin ASU earns its distinction. Both ASU (counted here for innovation, even though dose is scored in Dim 3) and boswellia are non-baseline ingredients for joint health. Two non-baseline actives at meaningful doses earns 4/4 for differentiation. This is the highest differentiation score possible and reflects Nutramax’s research-driven approach to formula design.
Quality Assurance — 6 / 15
Cosequin ASU has the strongest quality assurance profile among the products we have reviewed, though it still falls short of the maximum. The product does not carry NSF Certified for Sport or Informed Sport certification (0/7 for independent certification).
Nutramax states that they verify label claims as part of their quality control program, which qualifies as internal label claim verification (1/3 for COA). The company operates from a cGMP-certified facility and describes an “80+ quality checks” program with specific documentation — this earns full marks for manufacturing standards (3/3). Nutramax explicitly states testing for contaminants as part of their QC program (2/2 for contamination testing).
The use of trademarked raw material specifications (FCHG49, TRH122, NMX1000) provides an additional layer of implicit quality control — these specifications require batch verification against published standards. While not scored directly in this dimension, it reinforces confidence in manufacturing consistency.
Value — 10 / 15
At $139.99 for the 1,420 g container (81 servings), the cost per effective day at maintenance dose is $1.73. This falls in the $1.51–$1.75 range (6/8 for CPED) — slightly better than SmartFlex Ultra on a per-day basis.
However, cost per gram of the primary active (glucosamine) tells a different story: $1.73 / 7.2 g = $0.24/g, which falls in the $0.21–$0.25 range (3/5 for CPG). The lower glucosamine dose means each gram costs more than competitors offering 10,000 mg. If value is measured by glucosamine delivery efficiency, Cosequin ASU is less competitive — but this metric does not capture the value of ASU, which is the product’s primary differentiator.
Cosequin ASU is available in one standard container size only (1/2 for size options). No bulk discount option exists.
The Bottom Line
Cosequin ASU is the most scientifically differentiated joint supplement in our review. The inclusion of full-dose ASU and boswellia — ingredients backed by equine-specific research — sets it apart from conventional glucosamine-MSM-chondroitin formulas. The trademarked raw material specifications (FCHG49, TRH122, NMX1000) signal a level of manufacturing rigor that generic formulas cannot match. Where it falls short is dosing: glucosamine at 72% and MSM at 50% of therapeutic thresholds mean the base ingredients are underpowered. For horses that need maximum glucosamine delivery, this is not the product. For owners who value formula innovation, documented quality assurance, and the unique anti-inflammatory mechanism of ASU, Cosequin ASU offers something no other product in this category provides. Overall: 6.5/10.
Product Specifications
| Brand | Nutramax Laboratories |
| Product | Cosequin ASU Joint Health Supplement Pellets |
| Form | Pellets |
| Serving size | 17.5 g |
| Servings per container | 81 (1,420 g container) |
| Price | $139.99 |
| Cost per day | $1.73 |
| Target animal | Horses (500 kg reference weight) |
| Category | Joint Health |
| Manufacturing | cGMP facility, 80+ quality checks |
Frequently Asked Questions
Is 7,200 mg of glucosamine enough for joint support?
At 72% of the 10,000 mg therapeutic threshold, the dose is meaningful but suboptimal. For horses in light work or as a preventive measure, it may suffice. For horses with active joint deterioration or in heavy training, the shortfall becomes clinically relevant. Some owners double-scoop during loading periods to temporarily reach higher levels.
How does Cosequin ASU compare to SmartFlex Ultra?
Cosequin ASU scores 6.5 vs SmartFlex Ultra’s 6.8. Cosequin’s advantage is formula innovation — ASU at full 1,050 mg dose and boswellia are ingredients SmartFlex lacks entirely. Cosequin also has the strongest quality assurance documentation in our database (6/15 vs SmartFlex’s 1/15). SmartFlex wins on dosing: 10,000 mg glucosamine vs 7,200 mg, and 10,000 mg MSM vs 5,000 mg.
What makes the trademarked ingredients (FCHG49, TRH122) meaningful?
These designations refer to specific manufacturing and purity standards maintained by Nutramax. FCHG49 glucosamine and TRH122 chondroitin are produced under documented specifications that generic glucosamine and chondroitin may not meet. This provides batch-level consistency that is not guaranteed with unspecified raw materials.
What do the FCHG49 and TRH122 codes on the label mean?
They’re trademarked ingredient specifications with published quality standards — a strong transparency signal. We explain what to look for: What to Look for on a Horse Supplement Label
Sources
- Nutramax Laboratories — Cosequin ASU Joint Health Supplement product page and guaranteed analysis. nutramaxlabs.com. Accessed July 2025.
- National Research Council — Nutrient Requirements of Horses, 6th Revised Edition (2007). National Academies Press.
- Kawcak CE, Frisbie DD, McIlwraith CW, et al. — “Evaluation of avocado and soybean unsaponifiable extracts for treatment of horses with experimentally induced osteoarthritis.” American Journal of Veterinary Research, 2007. PubMed 17669024.
- Laverty S, Sandy JD, Celeste C, et al. — “Synovial fluid levels and serum pharmacokinetics in a large animal model following treatment with oral glucosamine at clinically relevant doses.” Arthritis & Rheumatism, 2005. PubMed 15641050.
- Nutramax Laboratories — Quality Control and Manufacturing Standards documentation. nutramaxlabs.com/quality. Accessed July 2025.
- EquineAuditLab — Scoring Calibration Sheet v2.0 (July 2025). Full scoring calculations available in the source archive PDF for this audit.