Inj are easier on the liver except stanozolol. Oral or inj., its about the same, perhaps a little more potent mg/mg when inj since it doesn't get degraded by the first pass in the liver as the oral form would. However, it is the chemical structure of the AAS that determines liver toxicity. Winstrol is a C-17 alpha alkylated AAS whether it is oral or inj. so a similar burden to the liver. AAS such as testosterone (except methyl-T, oral) and nandrolone esters have little liver toxicity in low to moderate doses, but cannot be taken orally. Oxandrolone is unique among orals because it is not extensively metabolized by the liver and has an oxo- group in its A ring making it less liver toxic than other C-17 alpha-alkylated orals, but at high doses it can adversely affect the liver, but much less so at lower doses when compared to orals such as methyl-T, halotestin, etc.
W6
W6