While I don't have any hard facts or make any claims about what it does, the idea that fruit juice = fruit is likely inaccurate. Juicing seems to leave behind the fiber and concentrate the sugar. It seems at least plausible that there's a significant difference in the digestion and metabolism of each.
Well they obiously had a lot more dirt in their diet by proxy. Fruit and veggies weren't as vigoriously washed as they are now, which is the reason why so many people are B12 deficient.
