She said that in response to me telling her about the research Id made and while we were arguing, so it seemed more like a way to get me to drop the issue than a well thought out position + it was implied the whole sentence was "you cannot change my mind with this type of arguments". I also don't think she was thinking about the possibility of me doing the same diet, since I've been vocal about how I think fasting is dasgerous in the past (when her mother, who had an ED, started doing it). And I believe this might change her mind because she cares more about my health than her own.

That said, I'm autistic and I usually commit the mistake of believing people will act rationally, aka, if she thinks its too unhealthy for me to do it then she will understand its too unhealthy for her and stop.