Key Takeaways
- Overall score: 6.4 / 10 — A broad, innovative formula with the strongest quality assurance in our database, held back by meaningful underdosing of all core joint actives.
- Highest Quality Assurance score in the database (8/15) — NASC certified, manufactured in Formula 707’s own cGMP-aligned facility in Colorado, with a described ingredient auditing program.
- Formula Design ties for the top tier (13/15) alongside Flex+Max and Platinum CJ. Ten active ingredients include green-lipped mussel, bromelain, and Type II collagen — three non-baseline differentiators rarely seen in the joint category.
- Dosing Adequacy is critically low (4/20). Glucosamine reaches only 45% of the 10,000 mg threshold and MSM only 50%. Chondroitin sulfate at 255 mg covers just 10% of the 2,500 mg target. No HA or ASU is present.
- At approximately $1.44/day (Fresh Pack pricing), the value is reasonable for the breadth of ingredients — but the cost per gram of primary active ($0.32/g glucosamine) is moderate given the sub-threshold dose.
- One point short of Recommended status on total score (64 vs 65 threshold), and DA far below the DA ≥ 12 requirement. A strong formula concept that needs higher doses to fulfill its potential.
Label Transparency — 13 / 15
Formula 707 provides clear quantitative disclosure for all ten active ingredients, with exact milligram amounts listed per serving. There are no proprietary blends. The label also lists the specific activity measure for bromelain (2000 GDU), which is an above-average level of detail for an equine supplement.
Source disclosure covers two of three source-relevant ingredients: glucosamine is identified as shellfish-derived and chondroitin sulfate as porcine-sourced. Type II collagen — the third source-relevant ingredient — does not consistently carry a source designation on the label, though some retailers list it as porcine. Green-lipped mussel is identified by species name (Perna canaliculus), which is helpful but falls outside the calibration sheet’s source-relevant ingredient list.
The serving size is clearly communicated (2 oz scoop included), serving counts per container are stated for each bag size, all inactive ingredients are listed by specific name, and dosing references the standard 1,100 lb horse. No trademarked ingredient specifications are used.
Ingredient Form — 15 / 20
With ten active ingredients scored, the form average reflects a mix of strong and weak form choices. Glucosamine HCl with verified shellfish source scores a perfect 4/4. MSM is listed as standard methylsulfonylmethane without an OptiMSM or equivalent branded specification (3/4). Chondroitin sulfate carries a porcine source designation (3/4). DL-Methionine, green-lipped mussel, bromelain, zinc, manganese, and copper are not in the calibration lookup table and receive the default 3/4 each.
The score is pulled down by Type II collagen, which is listed as a non-hydrolyzed, native form. The calibration sheet scores non-hydrolyzed collagen at 1/4, regardless of the Type II designation. While Type II collagen has a distinct biological mechanism (immune-mediated joint support rather than structural rebuilding), the form table evaluates bioavailability of the collagen matrix, where hydrolyzed forms are more readily absorbed.
The average form score across all ten ingredients is 2.90, yielding a dimension score of 14.5, rounded to 15/20.
Dosing Adequacy — 4 / 20
Joint 6-in-1 is scored against the four standard Joint Health scored ingredients: glucosamine (primary), MSM, chondroitin sulfate, and hyaluronic acid or ASU.
Glucosamine HCl (primary, threshold 10,000 mg): 4,500 mg delivered — 45% of threshold. This is below the 50% floor needed for a score of 3. While 4,500 mg is more than most budget supplements offer, it remains less than half of the therapeutic target for a 500 kg horse. Score: 2 / 8.
MSM (secondary, threshold 10,000 mg): 5,000 mg delivered — 50% of threshold. This sits at the lower edge of a functional dose; some horses may respond at this level, but it is half of what the research literature generally considers the therapeutic target. Score: 2 / 4.
Chondroitin sulfate (secondary, threshold 2,500 mg): 255 mg delivered — 10.2% of threshold. This is a token amount, far below any meaningful dose. Score: 0 / 4.
HA or ASU (secondary, threshold 100 mg / 1,000 mg): Neither hyaluronic acid nor ASU is present. Green-lipped mussel, while containing some natural glycosaminoglycans, is not counted as HA or ASU in our scoring framework. Score: 0 / 4.
Total: 2 + 2 + 0 + 0 = 4 / 20. The formula’s investment in breadth (green-lipped mussel, collagen, bromelain) comes at the expense of dosing depth on the core joint actives that drive this dimension’s score.
Formula Design — 13 / 15
Core completeness: Three of the four core joint ingredients are present: glucosamine, chondroitin, and MSM. Hyaluronic acid is absent. Score: 4 / 6.
Supporting ingredient breadth: Beyond the core four, the formula includes Type II collagen (3,200 mg), DL-methionine (1,600 mg), green-lipped mussel (940 mg), bromelain (110 mg), and zinc (130 mg) — five additional actives at quantified doses. This is the maximum score. Score: 5 / 5.
Formula differentiation: The baseline ingredients for Joint Health are glucosamine, chondroitin, MSM, HA, vitamin C, collagen, and silica. Non-baseline actives present at meaningful doses include DL-methionine (1,600 mg), green-lipped mussel (940 mg), bromelain (110 mg), zinc (130 mg, 32.5% of 400 mg hoof threshold), manganese (100 mg, 200% of 50 mg threshold), and copper (26 mg, 26% of 100 mg threshold). With six non-baseline actives, this far exceeds the two needed for a perfect sub-score. Score: 4 / 4.
Total: 4 + 5 + 4 = 13 / 15. This ties Flex+Max and Platinum Performance CJ for the highest Formula Design in the database, reflecting one of the most ambitious ingredient portfolios in the equine joint supplement market.
Quality Assurance — 8 / 15
Formula 707 earns the highest Quality Assurance score in the EquineAuditLab database, driven by a combination of third-party certification and transparent manufacturing practices. The product carries NASC (National Animal Supplement Council) certification — a named third-party body that conducts quality audits of supplement manufacturers. The NASC Quality Seal is publicly verifiable and indicates compliance with their labeling, quality, and adverse event reporting standards.
While no standalone Certificate of Analysis is publicly downloadable, Formula 707 describes an ingredient auditing program: all ingredients are purchased from vetted U.S. companies according to Standard Operating Procedures aligned with FDA-established cGMPs. The company manufactures in its own facility in La Salle, Colorado — not a contract manufacturer — which provides direct control over production quality. For competition safety, Formula 707 states that the product contains no prohibited substances and has been used in major federations without issue, though this is a self-declaration rather than an independent testing result.
Value — 11 / 15
Price note: This audit uses the Fresh Pack (28-day supply) price from Amazon as the reference, as pellet bag prices were not publicly visible at the time of research. Pellet bags (5 lb, 10 lb, 20 lb) are expected to offer lower per-day costs. The Value score should be considered conservative and may improve with verified pellet bag pricing.
Cost Per Effective Day (CPED): $40.40 ÷ 28 days = $1.44 per day. Score: 7 / 8.
Cost Per Gram of Primary Active (CPG): $1.44 ÷ 4.5 g glucosamine = $0.32 per gram. Score: 2 / 5.
Size options: Available in Fresh Packs (28 count), 5 lb bag (~40 days), 10 lb bag (~80 days), and 20 lb bucket (~160 days) at 2 oz/day maintenance, with per-day savings on larger sizes. Score: 2 / 2.
Total: 7 + 2 + 2 = 11 / 15.
The Bottom Line
Formula 707 Joint 6-in-1’s strongest attribute is its quality infrastructure — NASC certification, an in-house cGMP-aligned Colorado facility, and a described ingredient auditing program earn it the highest Quality Assurance score (8/15) in our database. Its most critical weakness is dosing: at 4,500 mg, glucosamine reaches only 45% of the therapeutic threshold, and chondroitin at 255 mg is essentially a label ingredient at 10% of target. This product is best suited for owners who prioritize manufacturing quality and formula breadth — particularly the green-lipped mussel and bromelain combination for anti-inflammatory support — and who are comfortable with sub-threshold glucosamine dosing. Owners seeking full-strength core joint actives should consider Flex+Max (6.9), SmartFlex Ultra (6.8), or Cosequin ASU (6.5), all of which deliver higher glucosamine at verified therapeutic doses. Overall score: 6.4 / 10.
Product Specifications
| Specification | Detail |
|---|---|
| Brand | Formula 707 (John Ewing Company) |
| Product | Joint 6-in-1 Pellets |
| Form | Pellet (alfalfa and wheat midd-based) |
| Serving size | 2 oz / 56.7 g (maintenance) / 2–4 oz (loading, first month) |
| Container sizes | Fresh Packs (28 ct), 5 lb bag, 10 lb bag, 20 lb bucket |
| Servings per container (10 lb bag) | ~80 days at 2 oz/day maintenance |
| Price (Fresh Packs, 28-day) | ~$40.40 (Amazon, accessed April 2026) |
| Cost per day | ~$1.44 (Fresh Pack reference; pellet bags likely lower) |
| Country of origin | USA (La Salle, Colorado — own facility) |
| Sport safety | Self-declared no prohibited substances; NASC certified; no NSF/Informed Sport |
Active ingredients per 2 oz (56.7 g) maintenance serving:
| Ingredient | Amount | Threshold (500 kg horse) | % of Threshold |
|---|---|---|---|
| Methylsulfonylmethane (MSM) | 5,000 mg | 10,000 mg | 50% |
| Glucosamine HCl (shellfish) | 4,500 mg | 10,000 mg | 45% |
| Type II Collagen | 3,200 mg | 2,000 mg | 160% |
| DL-Methionine | 1,600 mg | 2,500 mg | 64% |
| Green-Lipped Mussel (Perna canaliculus) | 940 mg | — | — |
| Chondroitin Sulfate (porcine) | 255 mg | 2,500 mg | 10% |
| Zinc | 130 mg | 400 mg | 33% |
| Bromelain (2000 GDU) | 110 mg | — | — |
| Manganese | 100 mg | 50 mg | 200% |
| Copper | 26 mg | 100 mg | 26% |
Frequently Asked Questions
Is 4,500 mg of glucosamine enough for a horse?
The widely accepted therapeutic threshold for oral glucosamine in a 500 kg horse is 10,000 mg per day. At 4,500 mg, Formula 707 Joint 6-in-1 delivers 45% of that target. While this is more than many budget supplements provide, it falls short of the dose supported by the research literature. Owners seeking full-threshold glucosamine should consider products like SmartFlex Ultra or Flex+Max, both of which deliver 10,000 mg per serving.
How does Joint 6-in-1 compare to Cosequin ASU?
Cosequin ASU scores 6.5/10 versus Joint 6-in-1’s 6.4/10. Cosequin ASU delivers higher glucosamine (7,200 mg vs 4,500 mg) and has the advantage of ASU at a full 1,050 mg dose. Formula 707 counters with broader ingredient breadth (green-lipped mussel, collagen, bromelain) and significantly stronger Quality Assurance (8/15 vs 6/15). Cosequin ASU earns a Recommended badge while Formula 707 receives Use With Caution due to its lower Dosing Adequacy.
Does the NASC certification mean this product is tested for prohibited substances?
NASC certification confirms that the manufacturer meets quality standards for labeling accuracy, adverse event reporting, and manufacturing practices. It does not specifically certify that each batch is tested for prohibited substances. Formula 707 separately states that the product contains no prohibited ingredients and has been used in major federations without issue, but this is a company self-declaration, not an independent lab verification like NSF Certified for Sport.
Sources
- Formula 707 — Joint 6-in-1 Pellets product page (accessed April 2026). Product description, dosing instructions, NASC certification, manufacturing claims, customer reviews.
- Chewy — Formula 707 Joint 6-in-1 Hay Flavor Pellets, 5 lb bag (accessed April 2026). Active ingredient amounts per serving, inactive ingredients, serving count per container, cGMP and ingredient sourcing description.
- Amazon — Formula 707 Joint 6in1, Daily Fresh Packs (28 ct) (accessed April 2026). Price reference (~$40.40 for 28-day supply). Consumer reviews.
- Heartland Veterinary Supply — Formula 707 Joint 6-in-1 Pellets (accessed April 2026). Confirmed per-serving ingredient amounts with forms and sources specified.
- Mad Barn Feed Database — Joint 6-in-1 Fresh Packs (accessed April 2026). Scoop size (56.7 g = 2 oz), ingredient listing.
- Formula 707 — Company homepage (accessed April 2026). NASC certification, Colorado facility, company history (since 1946).