I made juice this morning: 2 oranges, 2 kiwi, and 1 grapefruit. Made two cups of juice for my wife and me. I don't know about the science of sugar, but eating 1 orange, 1 kiwi, and half a grapefruit doesn't seem excessive to me.
I'd bet that eating the fruit & vegetables would be better. But at this point, neither my wife or I will be eating kale or celery for breakfast. Juicing helps us at least some vegetables in our diet. Baby steps.
Eating fruit is better than drinking fresh fruit juice, which is better than drinking Mountain Dew.
The problem is that people think fruit juice is healthy and nutritious, and they aren't aware they should limit consumption.
And that one cup of juice could be swigged down easily. You can see how some people would just pour another glass? (Especially if they think undiluted juice is healthy?)
56 grams of sugar total
Total sugar/serving:
28 grams
Total sugar/serving of a 12 oz. Coca Cola:
36 grams
Would you think that drinking more than 2/3's of a can of Coca Cola every morning would be healthy, if you were to add a bunch of vitamin C and whatever nutrients are present in Kiwi/Grapefruit to go along with it?
I was replying to that quote of yours, meaning that it doesn't take an excessive amount of fruit to make 8 oz. of juice.
I admitted that I don't know about the science of sugar, but I have a hard time believing that fresh fruit juice is equivalent to Coca Cola with some vitamins added in.