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White plastic gallon jug with red label and black cap

SpeCtra

SpeCtra 2679-GL Mega-FLX + HA Joint Solution Gallon

SKU CH-28D5-3KFB9

Gallon equine joint and muscle supplement with 150 mg/oz hyaluronic acid, patented selenium and vitamin E blend, MSM, keratin.

  • 150 mg/oz Hyaluronic Acid for fast joint relief
  • Patented selenium and Vitamin E blend targets muscle soreness
  • Proprietary FLX4 antioxidant builds long-term joint resilience
  • Supplies bioactive precursors that cells use to repair tissue
  • Reduces inflammatory mediators to improve equine mobility

Sore Muscle & Joint Solution for Horses

SPECTRA 2679-GL Mega-FLX + HA is a gallon-sized liquid supplement formulated for horses experiencing joint pain and muscle soreness. It combines 150 mg/oz Hyaluronic Acid with a patented blend of Selenium, Vitamin E, MSM, keratin and key amino acids. The proprietary FLX4 Functional Antioxidant system targets inflammation and supports long-term lameness improvement.

Check Feeding Program and Veterinary Advice

Verify that your current feeding regimen does not already supply high levels of Selenium or Vitamin E to avoid over-supplementation. Confirm the correct dosage rate for your horse's weight and workload before adding this product. Consult a veterinarian if the animal is on medication or has a diagnosed metabolic condition.

Gallon Container Handles Daily Dosing

The one-gallon jug provides a practical volume for daily top-dressing on feed, reducing the frequency of reorders for single-horse or multi-horse barns. A wide opening allows easy scooping or pumping without spillage. The liquid format ensures consistent ingredient suspension when shaken, delivering uniform nutrient levels in every serving.

How it compares

Measured against everything we stock in Agriculture & Livestock Supplies, at today’s prices. Recalculated every night.

Price $96.99
Pricier than about 84% of the 106 comparable items (median $34.99).

Specifications

Product
Brand nameSPECTRA

Questions about this item

Does the gallon jug of Mega-FLX + HA arrive ready to pour, or do I need a separate pump or measuring cup?

The product ships as a one-gallon liquid concentrate that you can pour directly into feed; no pump or measuring cup is included, so have a clean scoop or syringe on hand for accurate dosing.

The label shows 150 mg per ounce of hyaluronic acid — is that the only strength available in this formula?

Yes, the Mega-FLX + HA formula is produced at a single concentration of 150 mg of hyaluronic acid per fluid ounce, combined with the patented FLX4 antioxidant blend, selenium, vitamin E, MSM, keratin and key amino acids.

How long does a typical horse stay on the gallon before you see improved mobility?

The proprietary FLX4 system supplies bioactive precursors for joint repair while hyaluronic acid and MSM provide fast relief; many owners report noticeable mobility gains within the first few weeks of daily feeding at the recommended rate.

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