Fruit is pretty much delicate from a nutritional standpoint. The Hheat used in the canning process to sufficiently destroy micro-organisms and food enzymes also generally affects other properties of foods adversely. Its not such a deal with stuff like Tuna, but fruit, you might as well not bother if you are looking for some nutrional aspects beyond the sugar.
This is my take on it as a food scientist rather than someone trying to give you nutritional advice.
Ask someone else about the Fructose, liver thing or maybe someome will read this and add some comments.