Nope. Now I wonder if this is a good or bad thing from a evolutionary biology point of view... a strong healthy gut or a lazy immune system?

Sodium and Potassium Benzoate are actually carcinogenic in the presence of vitamin C. I remember reading that benzene, a well known carcinogen, will be formed under these conditions. If you supplement vit C at all avoiding benzoates can quite literally be a matter of life and death.

Definitely yes - especially Sodium Benzoate. In food, in medicins and in cosmetics.

ugh, just thinking about sulfites makes my stomach do a few flips. I can totally sympathize and the last time I did it to myself was overdoing some canned coconut milk like you did. If I cook with it and am only going to take in a small amount, I can be ok but not like a whole smoothie or something. Trader Joe's Lite coconut milk is sulfite free. and Aroy-D has some in a Tetra Pak (BPA free!) that's awesome but hard for me to get. Some Aroy-D canned is free of sulfites but read the labels because some of theirs isn't. Natural Value has some that's sulfite free I think and also guar gum free. It's also hard for me to find but if you find some let me know, please. This sensitivity really keeps my binge drinking to a minimum too since it's in red wines and ciders usually.

Sulfite sensitivityoccurs in about 1 out of 100 people. hmmm, sulfite`s a top allergen but not a "true allergy"

Sodium benzoate doesn`t get to me too much but I do try to avoid it. It sends my 10 yr old bouncing off the walls. I mostly get it in things like chili sauces and since I'm only using a small amount I don't really notice it.

Sodium metabisulfite gives me asthma. I discovered it one night checking labels when I had a bad attack during a meal. It turned out they were present both the can of tomatoes and the "Real Lemon" lemon juice that I added in preparing the soup.