Multiple Studies. One Solution: Fortetropin® for Muscle Health

Evidence Matters: How Fortetropin® Outperforms Other Supplements

Why Fortetropin® Is Different: Clinically Validated Across Species

Dear Veterinarian, 

At MYOS, we recognize how critical muscle health is to the wellbeing of your patients—whether for recovery, mobility, or aging. That’s why our products are powered by Fortetropin®, a proprietary, all-natural bioactive derived from fertilized egg yolk, and validated by multiple peer-reviewed clinical studies across species.

Unlike other supplements —which generally require exercise or additional anabolic stimuli—Fortetropin® works even in sedentary conditions. This unique mechanism makes it a valuable tool in both rehabilitation and geriatric care

Key Clinical Evidence in Dogs

Orthopedic Recovery (Kansas State University, 2019/2020)
Fortetropin® significantly reduced muscle atrophy in dogs following TPLO surgery, leading to improved recovery outcomes.

Clinical Studies 

Mobility in Geriatric Dogs (Canadian Vet Journal, 2020)
Supplementation reduced Liverpool Osteoarthritis Disease (LOAD) scores, improving mobility and quality of lifeClinical Studies PDF with links

Feline Muscle Health Evidence

Safety & Tolerability (University of Florida, 2021)
Daily doses of 1–4g were shown to be safe and well tolerated in cats, supporting long-term nutritional useClinical Studies PDF with link

CKD Patients (North Carolina State University, 2023)
70% of cats with stage 2–3 CKD showed increased lean muscle mass with no adverse renal effects, making Fortetropin® a promising option for fragile feline populationsClinical Studies PDF with links

Equine Evidence

Safety & Performance (Petaluma Equine Vet Hospital, 2022)
Horses tolerated Fortetropin® well, with data supporting both safety and muscle maintenance benefitsClinical Studies PDF with links

Human & Translational Research

University of Tampa (2016): Significant gains in muscle mass and size in young athletes.

UC Berkeley (2019): 18% increase in muscle protein synthesis in older adults.

McMaster University (2022): Helped prevent serum myostatin rise during leg immobilization in young menClinical Studies PDF with links

Rodent Studies

(2016) University of Tampa.  Rats demonstrated increased muscle growth, reduced atrophy, and lowered myostatin levels—further validating Fortetropin®’s mechanism of action

(2025) 21-Day Sedentary Mouse Study
Administration of Fortetropin® for just 21 days in sedentary, adult mice produced a significant 8% increase in lean muscle mass in both the thigh (quadriceps) and calf (gastrocnemius) compared to untreated controls. Importantly, this increase occurred without the need for exercise or other external stimuli, demonstrating Fortetropin®’s ability to directly support muscle development.

(2025) FSHD Rodent Model

Fortetropin® demonstrated statistically significant improvements in total muscle mass and treadmill running performance, underscoring its potential to improve both structure and function in disease states.

Why Fortetropin® is Different

Clinically proven across dogs, cats, horses, and humans.

Unique mechanism: lowers myostatin and activates muscle protein synthesis with or without exercise.

Safe and natural: well-tolerated in multiple species, including fragile populations.

Broad applications: from post-surgical recovery to mobility support in aging pets.

We are proud to provide veterinarians with a science-backed nutritional tool to help patients recover faster, stay stronger, and live healthier lives.

If you’d like more details or copies of the published research, I’d be happy to share them.