You've seen all the long unpronounceable words on the labels of your products.  You've heard about the need to avoid certain additives that can potentially have negative effects on your health.  But the question remains: what the heck are they?  Here are a couple of links to sites that have those and answers and more.

www.eande.va.com.au  This site list additives by name and number, where the additive is most likely to be found and common physical reactions that have been linked to each.

www.ukfoodguide.net   While this is a European site, it has an amazingly comprehensive list of additives divided by categories including preservatives, dye colors, sweeteners, emulsifiers, stabilizers, gelling agents, thickeners, antioxidants, sweeteners and others.

It even tells you which additives have been banned and in what countries.  This is a great site for information that is hard to elsewhere.  Plus it's in a very user-friendly layout.