Here is something they dont tell you about. sugar, both natural and artifical weakens your immune system by upto 50% for upto 5 hours making you more susceptible to diseases and infection. keep that in mind whenever you hear about supperfoods or the benefits of fruit and juicing fruit.
what this means is that if you are eating carbs all day, such as fruit and fruit juice you are effectively halving the effectiveness of your immune system (this is coming from someone who used to be a strict veggie).