There you have it — slammed right away with the bad news that fruit, of all things, can be unhealthy. To clarify, fresh fruit is still a great choice to satisfy hunger pains, but its canned cousin doesn’t make the grade. Instead of being allowed to naturally maintain its sweetness as ripe and fresh or even flash-frozen fruit does, the contents of these cans are preserved in a thick, sugary soup. On top of that, Jackson says that the can is sometimes lined with a toxic chemical that acts as a preservative. Good luck finding that listed on the label!