I first read about Breatharians in books that desribe what the Pyramid wall stories have to say about all of our history. Here the books say man in hus prime lived on air, the complete food, most likley all animals lived on air only, back in the true Garden of Eden type stories of the past.
The books also state that humans run in cycles and that the breatharians are on the way back, but modern medicine would not have this, it would destroy their practice.
Just think what the world would be like if no one had the need for food! They also would not be mating like crazy, they would know life and not be worring about producing billions of kids.
My best author explains we have degenerated very badly and a true breatharian has about 100+ more glands than the average sick person does.