Alacer (maker of Emergen-C, for one) has claimed it uses no GMO ingredients, no high-fructose corn syrup, and no MSG. But last year it was purchased by Pfizer. Well, we'll see if that changes. http://en.wikipedia.org/wiki/Alacer_Corp.
What *aren't* the big corporations taking over? I guess the only real answer is to buy locally-grown produce, buy organic produce, eat whole foods prepared at home, and look for vitamins/supplements made with whole food concentrates.
When we try to pick out anything by itself, we find it hitched to everything else in the Universe.
~ John Muir