It's been proved scientifically that microdosing EPO is undetectable and results in a significant performance boost: https://pubmed.ncbi.nlm.nih.gov/36317927/

It's been proved scientifically that microdosing EPO is undetectable and results in a significant performance boost: https://pubmed.ncbi.nlm.nih.gov/36317927/ https://pubmed.ncbi.nlm.nih.gov/36317927/ https://www.usada.org/wp-content/uploads/R058.pdf https://www.usada.org/wp-content/uploads/R058.pdf Now I cannot say this cannot be proven in the future, but right now it is definitely possible, and not even a secret.