Do they still make them- I have one form 1975 that is still going strong-they were the industrial juicer.
The motor on this thing is twice to 3 X's the size of a blender-hahah. I still use it and they clean up very nicely. I find I'd rather eat raw than juice raw-but I like to chew.
And of course one would have to eat a lot of a lot of stuff-to get the concentrated effect.