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  • BUILD MUSCLE MASS: MYOS Canine Muscle Health Formula is clinically proven to prevent muscle loss in all dogs, and is an effective muscle building supplement for puppies, adult dogs, and senior pets looking to enhance muscle growth.
  • ONE ALL-NATURAL INGREDIENT: The unique fertilized egg yolk supplement supplies valuable complex nutrients to support the muscle health of all dog breeds using one simple ingredient.
  • IMPROVED MOBILITY: Ideal for dogs with limited movement, this nutritional supplement is a powerful muscle mass gainer. Our Product is perfect for owners looking to improve leg strength and aid their dog’s recovery.
  • SENIOR SUPPORT: Muscle loss is common in older dogs; this natural health supplement may prevent muscle loss and promote increased daily movement and activity.
  • OUR PROMISE TO YOU: All MYOS Canine products come with a 100% satisfaction guarantee - just contact us if for any reason you’re not happy with your purchase and we'll be sure to make it right.

MYOS Canine Muscle Formula 12.7 oz Canister

  • What Is Fortetropin?

    Fortetropin® is a unique formula derived from fertilized chicken egg yolks. Our patented process preserves the biological integrity and bio-activity of nutrients in egg yolks. Fortetropin is considered a natural myostatin-reducing agent.

    Our scientists have developed a patented process to harness the immense power of fertilized egg yolk – one of nature’s most nutrient-dense substances!

    The resulting ingredient is Fortetropin®.



    Completed Research


    Kansas State University: Fortetropin resulted in decreased Liverpool Osteoarthritis in Dogs’ (LOAD) scores in geriatric dogs. Read study


    Kansas State University:  Fortetropin® prevented atrophy of disuse and improved recovery from TPLO surgery. Read study


    University of Tampa:  Fortetropin acts by upregulating mTOR pathway (promoting muscle growth), downregulating Ubiquitin pathway (slowing muscle degradation), and lowering myostatin levels (promoting muscle growth). Read study.


    University of Florida: Safety and tolerability in healthy cats. Read study.


    Animal Medical Center, NYC:  Impact of Fortetropin on serum myostatin concentration in dogs. Read study.


    University of California, Berkeley: Fortetropin increased rate of muscle protein synthesis by 18% in older adults. Read study.


    McMaster University: In a study involving the unilateral leg immobilization model in young men, Fortetropin supplementation prevented a rise in serum myostatin levels. Read study.





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