Going from what a mate has told me who is a nutrionist preservatives are work of the devil
Big cause of general fatness! Body doesnt know what to do with preservatives in a large amount (found in quite a lot of foods! and looking at some peoples trollies in asda diets are to be desired) and cant break it down. So instead it stores all this as fat until the body has the time to break it down.
If you start eating organic most people will find they start to loose weight as the body can digest all the organic matter as its proper food and will then start to work on the deposits stored.
Makes a big difference in the well being of people now, we still eat a lot of the same foods people use to back in early 1920s+ but it was just fresh produce all the time.
So no I doubt you will live longer probably just end up a fattie and die of a heart attack.
O another thing, there is a chemical in seaweed that makes all food taste better. They add this to foods today so everything tastes better than it normally would. The only problem is it has around 50 different chemical names and looking for it on a food label could take quite some time.