I swear I'm allergic to the sulphur preservative in wine. I know, not exactly a health food but I really like wine and 2 glasses means a headache & nausea the next day.

I guess the answer is that the vast majority of people don't have side effects (or side effects that are easily linked back to the additive) and no studies definitely, conclusively say they are a no-no, so they are deemed to be ok. Doesn't mean that they are, just that noone has proved it yet. When you think about funding for research, who is going to cough up to have a study show these cheicals are not good for us? Like Bath said, vested interests...

Hard work for you, but from scratch sounds really yummy to me!