Whether she sometimes has valid points or not, when the majority of them are invalid then she's being destructive. Same as Dr. Oz.
This is not promoting 'awareness of what we eat' it's promoting paranoia and the same sort of anti-science sentiment behind anti-vaxxers and anti-gmoers. It would be promoting awareness if she simply listed these ingredients, what they are, what they are used for. She doesn't do that, she approaches everything as if all ingredients with more than 2 syllables are bad, and worthy of crusading against.
Since when does cashing in on fear mongering = activism?