User blog comment:Ohshizim15/Big Daddy's Return to normal after they leave Rapture?/@comment-1976987-20100903081555

Impossible. The effects of the voice modulator are permanent, as said by Frank Fontain, and as you did mention that the suits are grafted to their skin, but seeing as the time he got out could have been around 1962, depending on how long he stayed around to gather up the little sisters (This is the good ending story, which I got), he could have been able to get some sort of surgery, and with ADAM he could have been able to survive it, but remember he didn't actually BECOME BECOME big daddy, I presume he only put the suit on, but it is a "One way street" so I guess we may never know. We could debate it for a VERY long time, and may never come out into a solid answer. Sorry, dude, I guess we will never find out.