Watched Heavy Muscle Radio with Palumbo and Aceto, they touched on this, they reiterated no need for orals and also stated there is no steroid that affects the kidneys, steroids specifically orals affects the liver. Bonac is true in terms of saying training especially over training does impact the kidneys, ask anyone who has gotten rhabdomyolysis they'll confirm this, hydration, high blood pressure, diuretics..these affect the kidneys.