My dear wife found a nice app on her iPhone the other day. I had a look at it and installed it too.
The free version lists the most common 50 additives, whereas the full version has a lot more.
Avoid those additives that are potentially dangerous or unsafe to your health & see which ones are considered safe. This application is perfect for those at risk, the health conscious, parents, vegetarians, vegans and/or people on religious based diets.
What I found amazing is the fact that most food colours (series 100) are potentially dangerous. So the lesson from there: Avoid colour in your food, unless you use spices or vegetables or fruit – I mean NATURAL ingredients.