Veterinary growth promoters (ractopamine / zilpaterol / zeranol)
Muscle & Strength · Veterinary beta-agonist / estrogenic growth promoter
Tier D
What this is
WADA coverage: ractopamine, zilpaterol and zeranol. Included because they are perceived as anabolic/body-composition agents, not because they have credible consumer health use.
Mechanism
Livestock growth promoters shift nutrient partitioning toward lean tissue; human performance use is extrapolated from veterinary pharmacology rather than tested health-optimization evidence.
Dose & route
No approved human performance dose
Citations
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This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.