Direktör James Mangold besvarade detta i ett intervju med Empire Online .

I denna XCU-version har Logans helandefaktor förändrats över tiden. Medan de fortfarande läker honom, läker de inte längre honom perfekt och lämnar ärr.

“One of the things we all thought about as we worked on this film is, well, we don’t want to rebuild everything. We want to have some questions. In order to make a different Logan, and a different tone of a Wolverine movie, we felt like we couldn’t hold on to every tradition established in all the movies religiously, or we’d be trapped by the decisions made before us. So we questioned whether Logan’s healing factor causes him to heal without even a scar. We imagined that it may have when he was younger, but with age, he’s getting older and ailing. Perhaps his healing factor no longer produces baby-soft skin. So we imagined he heals quickly, still, but it leaves a scar. The simple idea was that his body would start to get a little more ravaged with a kind of tattooing of past battles, lacerations that remain of previous conflicts.”

I den sista delen av filmen lämnar hans helande faktor inte bara ärr, det fungerar också mycket långsammare. Det är starkt underförstått att adamantium inuti honom förgiftar honom, vilket resulterar i en minskad helande faktor.