The whole inject winny over injest winny is old bro-ology - I believe it is theorized that you get greater nitrogen retention from injection, but who knows. Also, you waste very little by injesting, certaily not 50%, 17aa makes orals well over 90% bioavailable. As well, injecting STILL effects your liver, you only skip first pass - which is arguably the most stressful - but it is duration of the liver being stressed rather than the amount of the liver being stressed that causes the most damage - it's people who are on liver damaging compounds for long periods of time that causes the most damage. It's this thought process that leads people to be on injectable winny for longer runs than orals, and that in itself can be more damaging. As well, the most damaging aspect of winny - cholesterol sides - that is the same with both inject and oral. I just think there are better compounds than winny.