Board Thread:Manga/@comment-24407809-20160709015000/@comment-28980080-20160710023718

GodKingReiss wrote: Weeeeell, the last time someone partially ingested a serum instead of fully injecting it, that didn't go too well... Wow, how the hell did I forget about that?

Personally, though, I don't think that the structure of Rod's titan form had anything to do with how much (or how little) he ingested. Perhaps he would've become that ginormously hideous thing no matter what he did with the serum. But again, nobody knows a whole lot about this stuff, just that it makes Titans and can heal people on the brink of death.