“and ditching meat altogether”
so, CNN is advocating killing us all via B-12 deficiency ...
You are aware, of course, that no mammals are capable of manufacturing Vitamin B-12 in their bodies.
Any B-12 contained in a mammal (or fish, reptile, bird - or indeed any multicellular organism) was obtained by the animal by ingesting a source of B-12.
B-12 is created only by certain bacteria and archeae.
Regards,