What is better buying foods with or without artificial preservatives?

That depends. If you want foods that last longer, and are cheaper buy foods with preservatives. If you want foods that are healthier( foods with preservatives are most likely going to have extra fat, sugar and salt ) and are natural in taste, ( Some artificially preserved foods have an artificial taste that isn't as satifying as the real thing ) buy foods without artificial preservatives. It depends. Generally, avoid anything with nitrates. Some of the preservatives have been shown to have no negative effects, but nitrates seem to cause problems.