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MYOS Muscle Formula


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®.

Clinically Proven

MYOS is dedicated to improving our pets lives with products that have been clinically proven to support muscle health.

Research has shown that better muscle heath leads to better mobility, vitality and quality of life. 


Simple. Natural. Proven. MYOS uses a single, all-natural ingredient called Fortetropin®. No additives or artificial ingredients. Fortetropin® has been shown in multiple clinical studies to accelerate gains in muscle mass, improve mobility and enhance recovery from injury.

Veterinarian Recommended.Veterinarians reported that older dogs engaged in more physical activity after consuming Fortetropin® and resumed certain activities that were thought to have stopped because of age.

100% Safe. Not only is MYOS safe for your dog, but it’s safe for you too. We wouldn’t feed our dogs something that we wouldn’t be willing to eat ourselves.