User blog comment:Fliu/Chapter 929: Jurassic Wano/@comment-3075024-20190101175736/@comment-99.72.92.253-20190103050734

Alright, but that does not mean that they cannot be used by or on other devil fruit users. It probably won't be good for them, but I given what we have seen these things are probably only good for Chopper because he has refined both them and himself to reduce the side effects. I doubt that they were good for him when he stared experimenting. I just wonder how they would affect the psychology of say a Smiles devil fruit user vs a natural one. Or a natural on vs Chopper, there are a number of possibilities here.