Idk, I mean they work orally just fine (they’re all engineered to be oral medications for convenience/compliance), but many of them lose tissue selectivity above the minute clinical dose ranges when you start getting into bodybuilding and PED ranges. Some of them really shine anabolicly at low doses compared to test, but quickly lose luster when you turn things up.
I can tell you from firsthand experience that LGD4033 does work better injected, but I don’t think that’s inherently the case across the board.