@sjhume Why don't you drink it, test your BS and see for yourself? Regardless of other people's opinions, only you will be able to see the effect it has on your body, nobody else.
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We are generally advised to eat the whole fruit or vegetable as it includes the fibre which slows down the absorption of the sugars. However, by having the juice you still get all the nutritional benefit (except the fibre), hence you can cram more nutrients into your body with a juice as it's easier to drink a juice containing vegetables and fruit than it is to chow down the same amount of raw food.
I bet you could have a glass of that juice for breakfast, alongside some scrambled eggs or something, and you wouldn't get too much of a problem. I sometimes have a juice mid morning with a handful of macadamias without any problems.