I’m sorry you had to deal with this person trying to shame you. I’ve been vegan (never fruitarian) 18 years. My periods went away from pregnancy/nursing and then from my IUD (I just wrote about this yesterday) but never because of what I ate or didn’t. I agree a missing period is something that warrants further questioning, not something to brag about.
Every body is different, and I wish people wouldn’t do this sort of shaming. There are plenty of legit reasons to eat plants, without reaching for fake reasons like this. ❤