This post is a response to Anonymous' comment on my blog: The Naked Truth. It became too long to not use as it's own blog post. Please re-read that blog if you haven't already and check out her full comment.
My comment about preservatives being neither good nor bad was not a comment on the functionality of the preservative (good, or else food companies would save money by not using them), but rather in terms of healthy/unhealthy. They aren't specifically bad for you, and not specifically good for you either - other than the fact that they inhibit certain microbial growth, thus making the food safer.
It's interesting how everything is either health food or junk food to some people. How do you define health food. Does one serving have to provide specific quantities of every nutrient? Does it have to be low fat, sodium, calories, sugar? If so, are you prepared to show me sound, peer reviewed science that fat, sugar, sodium, and calories of any quantity are bad? Healthy is another loaded term and very much depends on the person and a tally of everything else they have eaten that day/week. For instance, if you are short by a certain amount of fat, protein, and calories... a Snickers bar could complete your diet. In this case, it would have positively contributed to your health and can be considered healthy.
Today's clickable link will lead you to the American Center on Science and Health and a study/experiment headed up by Dr. Ruth Kava PhD, R.D. which tried to analyze nutrient intake, and in one instance, see if weight loss was possible on a McDonald's only diet for 30 days.