Not entirely Division, winny injected avoids the first-pass of the liver. While both are 17-aa, orals undergo enterohepatic circulation, then further liver damage with metabolism. Also, the bioavailability of the oral is about 2/3 that of the injected, so 50/day inj = 75 or so oral. Oral means a lot of damn pills to get a good effect, so most people short-change themselves. The scar tissue point is valid, but winny may not really need to be injected every day. Does anyone have experience of 100 eod, for example? In reality, most people don't do winny but say 6 weeks, so liver functions are not a big problem inject or oral. But technically the inject will be pathologically a little better than the oral, and certainly more effective overall.