Nope, never heard that before. I doubt I’ll bother having another pineapple core after the last one, but thanks for the info! :-)
I was curious, and found these; (and apparently there are other plant products that also cause phytobezoars):
https://www.thieme-connect.com/products/ejournals/pdf/10.1055/s-0034-1377598.pdf
https://en.wikipedia.org/wiki/Coca-Cola_treatment_of_phytobezoars
In my local Hispanic grocery store, I see ‘pineapple tea’, and always wondered about it. This is from Food52:
https://food52.com/blog/15910-stop-tossing-your-pineapple-peels-turn-them-into-tea-instead