I'll give it a 6 out of a 10, mainly because the jist of the movie is well intentioned. That being said however, the movie does have it's share of problems. I'd like to reiterate what others have said - it turns into a juicing commercial about halfway through. Juicing may have it's time and place, but as a regular diet it isn't a healthy thing to maintain.
My other problem with this move is the lack of data and facts about the "independent studies" they keep talking about. Sure, they present and bad-mouth the manufacturers studies all day long. But the supposed independent studies which counter all the manufacturers studies are talked about, but not presented or shown in any way. Where are they? Because of this, the movie at times feels like a story you hear from your buddy how they heard from so-and-so about this or that.
For example, the story about the Pilots being told by the "Pilot Association" that aspartame is to be avoided? Manufactured BS. While I don't doubt that something artificial is most likely bad for you, there hasn't been ANY formal statement to Pilots on the issue of aspartame. As a Pilot, I would know. I have never been told by nor read anything related to the matter. Neither has my wife, who is a Helli Pilot. We both looked at each other when that segment came on and said WTF to each other.
Even the so-called "Aspartame Consumer Safety Network" confirms that the FAA may know about it, but hasn't issued any statement about it. Thay also claim that organizations like AOPA and ALPA have been warning Pilots for years. This is also false. They have not and a simple goggle search under those two organization will prove it. Here is a link to the ACSN article I'm talking about: http://www.aspartamesafety.com/Article4.htm Again, overall decent flick meant to open your eyes on the dangers of processed food. It succeeds in this area, however many of the "facts" are presented in that fast-and-loose manner so commonly found online these days.
Recommended to watch, trust the jist of it, don't trust the facts presented 100%.