https://www.theguardian.com/lifeandstyle/2017/aug/11/why-we-fell-for-clean-eating
Huge article!
Sure, there is a lot of mumbo jumbo out there, but I've always taken "clean" to mean only eating things that either grew in the ground or once had a heart beat.
>>but I've always taken "clean" to mean only eating things that either grew in the ground or once had a heart beat
My definition of clean is closer to "can I pick up the spilled doritos before the kids get their grubby hands on them"